SELECTIVE INSURANCE GROUP INC SIGIP Financial Statement Data


2025 Q2

Submissions

Field Row 1
adsh 0000230557-25-000010
cik 230557
name SELECTIVE INSURANCE GROUP INC
sic 6331
countryba US
stprba NJ
cityba BRANCHVILLE
zipba 07890
bas1 40 WANTAGE AVENUE
bas2
baph 9739483000
countryma US
stprma NJ
cityma BRANCHVILLE
zipma 07890
mas1 40 WANTAGE AVE
mas2 40 WANTAGE AVE
countryinc US
stprinc NJ
ein 222168890
former SRI CORP
changed 19860508
afs 1-LAF
wksi 0
fye 1231
form 10-Q
period 20250331
fy 2025
fp Q1
filed 20250425
accepted 2025-04-25 12:06:00.0
prevrpt 0
detail 1
instance sigi-20250331_htm.xml
nciks 1
aciks

Description
Field Name Field Description
adsh Accession Number. The 20-character string formed from the 18-digit number assigned by the SEC to each EDGAR submission.
cik Central Index Key (CIK). Ten digit number assigned by the SEC to each registrant that submits filings.
name Name of registrant. This corresponds to the name of the legal entity as recorded in EDGAR as of the filing date.
sic Standard Industrial Classification (SIC). Four digit code assigned by the SEC as of the filing date, indicating the registrant’s type of business.
countryba The ISO 3166-1 country of the registrant's business address.
stprba The state or province of the registrant’s business address, if field countryba is US or CA.
cityba The city of the registrant's business address.
zipba The zip code of the registrant’s business address.
bas1 The first line of the street of the registrant’s business address.
bas2 The second line of the street of the registrant’s business address.
baph The phone number of the registrant’s business address.
countryma The ISO 3166-1 country of the registrant's mailing address.
stprma The state or province of the registrant’s mailing address, if field countryma is US or CA.
cityma The city of the registrant's mailing address.
zipma The zip code of the registrant’s mailing address.
mas1 The first line of the street of the registrant’s mailing address.
mas2 The second line of the street of the registrant’s mailing address.
countryinc The ISO 3166-1 country of incorporation for the registrant.
stprinc The state or province of incorporation for the registrant, if countryinc is US or CA.
ein Employee Identification Number, 9 digit identification number assigned by the Internal Revenue Service to business entities operating in the United States.
former Most recent former name of the registrant, if any.
changed Date of change from the former name, if any.
afs Filer status with the SEC at the time of submission:
1-LAF=Large Accelerated, 2-ACC=Accelerated, 3-SRA=Smaller Reporting Accelerated, 4-NON=Non-Accelerated, 5-SML=Smaller Reporting Filer, NULL=not assigned.
wksi Well Known Seasoned Issuer (WKSI). An issuer that meets specific SEC requirements at some point during a 60-day period preceding the date the issuer satisfies its obligation to update its shelf registration statement.
fye Fiscal Year End Date, rounded to nearest month-end.
form The submission type of the registrant’s filing.
period Balance Sheet Date, rounded to nearest month-end.
fy Fiscal Year Focus (as defined in the EDGAR XBRL Guide Ch. 3.1.8).
fp Fiscal Period Focus (as defined in the EDGAR XBRL Guide Ch. 3.1.8) within Fiscal Year.
filed The date of the registrant’s filing with the Commission.
accepted The acceptance date and time of the registrant’s filing with the Commission.
prevrpt Previous Report – TRUE indicates that the submission information was subsequently amended.
detail TRUE indicates that the XBRL submission contains quantitative disclosures within the footnotes and schedules at the required detail level (e.g., each amount).
instance The name of the submitted XBRL Instance Document. The name often begins with the company ticker symbol.
nciks Number of Central Index Keys (CIK) of registrants (i.e., business units) included in the consolidating entity’s submitted filing.
aciks Additional CIKs of co-registrants included in a consolidating entity’s EDGAR submission, separated by spaces. If there are no other co-registrants (i.e., nciks=1), the value of aciks is NULL. For a very small number of filers, the entire list of co-registrants is too long to fit in the field. Where this is the case, users should refer to the complete submission file for all CIK information.

Numbers

adsh ddate tag value uom qtrs version segments coreg footnote
0000230557-25-000010 20241231 Commercial Mortgage Loan Fair Value 224842000.0000 USD 0 0000230557-25-000010
0000230557-25-000010 20240331 Common Stock Dividends Per Share Declared 0.3500 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Accrued Investment Income Receivable 74300000.0000 USD 0 us-gaap/2024 Investment Type= Debt Securities Available For Sale;
0000230557-25-000010 20250331 Additional Paid In Capital Common Stock 571289000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Allowance For Loan And Lease Losses Real Estate 66000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Alternative Investment 42776000.0000 USD 0 us-gaap/2024 Investment Type= Real Assets;
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 462904000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 451230000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 38061000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 1784383000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Payments For Repurchase Of Common Stock 25200000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 10388000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 1852079000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 7606000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 10388000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Commercial Mortgage Loan Fair Value 0.0000 USD 0 0000230557-25-000010 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2;
0000230557-25-000010 20241231 Common Stock Shares Outstanding 60847896.0000 shares 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 2854000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 35000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 11649000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 669000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 8000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 11580000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 695000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 11544000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20241231 Deferred Income Tax Assets Net 146788000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Dividends Common Stock 23354000.0000 USD 1 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20250331 Dividends Preferred Stock Cash 2300000.0000 USD 1 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20241231 Equity Securities Fv Ni 1834000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20241231 Equity Securities Fv Ni 213601000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Equity Securities Fv Ni 1834000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20241231 Equity Securities Fv Ni Cost 211486000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Gain Loss On Investments 229000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 24735000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 24735000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 125245000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Income Loss From Equity Method Investments Net Of Dividends Or Distributions 5873000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Income Tax Expense Benefit 25118000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Increase Decrease In Employee Related Liabilities -16051000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Increase Decrease In Other Operating Liabilities -101445000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 49932000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A7.25 Senior Notes Due2034;
0000230557-25-000010 20250331 Mortgage Loans On Real Estate Commercial And Consumer Net 257748000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Net Cash Provided By Used In Financing Activities 346185000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Cash Provided By Used In Operating Activities 283987000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Investment Income 3615000.0000 USD 1 us-gaap/2024 Investment Type= Commercial Mortgage Loans;
0000230557-25-000010 20240331 O C I Reclassification Adjustment From A O C I For Write Down Of Securities Net Of Tax -61000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20240331 Other Income 27000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Product Or Service= Miscellaneous Income;
0000230557-25-000010 20250331 Other Income 572000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Miscellaneous Income;
0000230557-25-000010 20241231 Other Short Term Investments 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Other Short Term Investments 509318000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Other Short Term Investments 631090000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Payments To Acquire Available For Sale Securities Debt 521745000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments To Acquire Property Plant And Equipment 13013000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 64115000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines;
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 555833000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines;
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 222000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 87990000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines;
0000230557-25-000010 20250331 Preferred Stock Dividends Income Statement Impact 2300000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Preferred Stock Par Or Stated Value Per Share 0.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Preferred Stock Shares Authorized 5000000.0000 shares 0 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 1050944000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 103846000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines;
0000230557-25-000010 20250331 Premiums Earned Net 294687000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= General Liability;
0000230557-25-000010 20250331 Premiums Earned Net 8221000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Other Commercial;
0000230557-25-000010 20250331 Premiums Earned Net 52968000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Personal Automobile;
0000230557-25-000010 20250331 Premiums Receivable Gross 1561342000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Sale Of Equity Securities Fv Ni 6336000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Sale Of Short Term Investments 1294522000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Revenues 1058745000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Revenues 104227000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines;
0000230557-25-000010 20250331 Revenues 104227000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Revenues 1164266000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Stockholders Equity 210895000.0000 USD 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20241231 Stockholders Equity -72206000.0000 USD 0 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent;
0000230557-25-000010 20250331 Stockholders Equity -85893000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment;
0000230557-25-000010 20250331 Stockholders Equity -272068000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Stockholders Equity 571289000.0000 USD 0 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20240331 Stock Issued During Period Shares Dividend Reinvestment Plan 4806.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20240331 Stock Issued During Period Value New Issues 0.0000 USD 1 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20241231 Treasury Stock Common Shares 44761468.0000 shares 0 us-gaap/2024
0000230557-25-000010 20250331 Treasury Stock Shares Acquired 233611.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Accrued Income Taxes 56148000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Accumulated Other Comprehensive Income Loss Net Of Tax -336845000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Additional Paid In Capital Common Stock 557042000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Alternative Investment 440896000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 483609000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 139906000.0000 USD 0 us-gaap/2024 Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 3312258000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 367994000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 242679000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 1692358000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 120155000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 2033149000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 120155000.0000 USD 0 us-gaap/2024 Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 3237221000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20240331 Benefits Losses And Expenses 1062393000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents 11844000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents 108294000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Commercial Mortgage Loan Fair Value 0.0000 USD 0 0000230557-25-000010 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1;
0000230557-25-000010 20250331 Commercial Mortgage Loan Fair Value 251498000.0000 USD 0 0000230557-25-000010
0000230557-25-000010 20250331 Common Stock Dividends Per Share Declared 0.3800 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Common Stock Shares Authorized 360000000.0000 shares 0 us-gaap/2024
0000230557-25-000010 20240331 Comprehensive Income Net Of Tax 70547000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Comprehensive Income Net Of Tax 174673000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 6000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 29000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 280000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Debt Securities Held To Maturity Allowance For Credit Loss 0.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss 25310000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Deferred Policy Acquisition Cost Amortization Expense 219435000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Depreciation Amortization And Accretion Net 9084000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Dividends Preferred Stock Cash 2300000.0000 USD 1 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20240331 Earnings Per Share Basic 1.3200 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Earnings Per Share Basic 1.7700 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 43279000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities 2465000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Equity Securities Fv Ni 1821000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 841000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 264650000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 1821000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20240331 Gain Loss On Investments -1635000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Gain Loss On Investments 2650000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Gain Loss On Investments -629000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Gain Loss On Sale Of Property Plant Equipment 72000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest -5335000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 32918000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Income Tax Expense Benefit -5815000.0000 USD 1 us-gaap/2024 Consolidation Items= Corporate Non Segment;
0000230557-25-000010 20240331 Increase Decrease In Premiums Receivable 126033000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables 170279000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables 157255000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 0.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A5.90 Senior Notes;
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 99590000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A6.70 Senior Notes Due2035;
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 504148000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= Long Term Debt Excluding Issuance Costs;
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 60000000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A3.03 F H L B I Due2026;
0000230557-25-000010 20240331 Net Cash Provided By Used In Financing Activities -29627000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Cash Provided By Used In Investing Activities -584902000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Income Loss 131855000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent 64777000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Income 4860000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Miscellaneous Income;
0000230557-25-000010 20241231 Other Short Term Investments 35093000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Other Short Term Investments 272000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20240331 Payments Of Dividends Common Stock 20784000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments Of Dividends Common Stock 22268000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments To Acquire Held To Maturity Securities 2400000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Payments To Acquire Mortgage Notes Receivable 22256000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Payments To Acquire Property Plant And Equipment 6199000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 704292000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Preferred Stock Dividends Income Statement Impact 2300000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Preferred Stock Dividends Per Share Declared 287.5000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Preferred Stock Liquidation Preference 25000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 12088000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Surety Segment;
0000230557-25-000010 20240331 Premiums Earned Net 56960000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Personal Automobile;
0000230557-25-000010 20250331 Premiums Earned Net 283585000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Commercial Automobile;
0000230557-25-000010 20250331 Premiums Receivable Allowance For Doubtful Accounts 21600000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Prepaid Reinsurance Premiums 235378000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital 3859000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Sale Of Available For Sale Securities Debt 241928000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Revenues 106214000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Revenues 1285186000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20231231 Stockholders Equity -635209000.0000 USD 0 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20240331 Stockholders Equity -384972000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Other Comprehensive Income;
0000230557-25-000010 20241231 Stockholders Equity 3120076000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Stock Issued During Period Value New Issues 0.0000 USD 1 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20240331 Stock Issued During Period Value Share Based Compensation 11091000.0000 USD 1 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20240331 Stock Issued During Period Value Share Based Compensation 438000.0000 USD 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Treasury Stock Shares Acquired 233611.0000 shares 1 us-gaap/2024
0000230557-25-000010 20240331 Unrealized Gains Losses On Securities With Credit Loss Recognized In Earnings Net -2474000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Unrealized Gains Losses On Securities With Credit Loss Recognized In Earnings Net 10086000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20241231 Commercial Mortgage Loan Fair Value 0.0000 USD 0 0000230557-25-000010 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2;
0000230557-25-000010 20231231 Common Stock Shares Outstanding 60636437.0000 shares 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20240331 Common Stock Shares Outstanding 60791439.0000 shares 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 570000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 12616000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 11342000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Debt Securities Availableforsale Allowancefor Credit Loss Net -497000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Deferred Policy Acquisition Cost Amortization Expense 247434000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Depreciation Amortization And Accretion Net 9131000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Dividends Common Stock 21464000.0000 USD 1 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20250331 Employee Related Liabilities Current And Noncurrent 105611000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20241231 Equity Securities Fv Ni 169500000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Measured At Net Asset Value Per Share;
0000230557-25-000010 20250331 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20241231 Goodwill 7849000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities 25375000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 24800000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 106214000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 138886000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Income Tax Expense Benefit 557000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Income Tax Expense Benefit 28990000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Income Tax Expense Benefit 9584000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Tax Expense Benefit -58000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Increase Decrease In Deferred Policy Acquisition Costs 13188000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Increase Decrease In Other Operating Assets 6226000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Investments 9651297000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20231231 Liability For Claims And Claims Adjustment Expense 5336911000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 294627000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A5.375 Senior Notes Due2049;
0000230557-25-000010 20240331 Net Cash Provided By Used In Investing Activities -86007000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Net Income Loss 2093000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Net Income Loss Available To Common Stockholders Diluted 80218000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent 64088000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent -11971000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax -689000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax 54715000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Income 77000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Product Or Service= Miscellaneous Income;
0000230557-25-000010 20250331 Payments To Acquire Equity Securities Fv Ni 57682000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 0.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 84344000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines;
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 84344000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 704292000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations;
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 704292000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 0.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20241231 Preferred Stock Shares Authorized 5000000.0000 shares 0 us-gaap/2024
0000230557-25-000010 20250331 Preferred Stock Value 200000000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 251720000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Commercial Automobile;
0000230557-25-000010 20240331 Proceeds From Debt Net Of Issuance Costs 0.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital 3448000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Property Plant And Equipment Net 100098000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Reinsurance Recoverables Allowance 2000000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Reinsurance Recoverables On Unpaid Losses Gross 1063145000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Reinsurance Recoverables On Unpaid Losses Gross 926944000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Restricted Cash 62933000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Retained Earnings Accumulated Deficit 3223731000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Revenues 1164959000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Revenues 120920000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Revenues 917070000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Stockholders Equity 3006494000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Stockholders Equity 534327000.0000 USD 0 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20240331 Stockholders Equity -641906000.0000 USD 0 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20241231 Stockholders Equity -86582000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment;
0000230557-25-000010 20241231 Stockholders Equity -250263000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Net Unrealized Investment Gain Loss;
0000230557-25-000010 20241231 Stockholders Equity 211219000.0000 USD 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20241231 Stockholders Equity -650829000.0000 USD 0 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20250331 Stockholders Equity -186175000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Net Unrealized Investment Gain Loss;
0000230557-25-000010 20250331 Stockholders Equity 3223731000.0000 USD 0 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20250331 Treasury Stock Value 676085000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Treasury Stock Value Acquired Cost Method 19400000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Unearned Premiums 2616268000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Alternative Investment 42173000.0000 USD 0 us-gaap/2024 Investment Type= Real Assets;
0000230557-25-000010 20250331 Assets 14197563000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 8476078000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 782506000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 35518000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 1692358000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 7426000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 9302000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 3068180000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 9302000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 7905444000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 425344000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 134475000.0000 USD 0 us-gaap/2024 Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Benefits Losses And Expenses 1146300000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Commercial Mortgage Loan Fair Value 224842000.0000 USD 0 0000230557-25-000010 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3;
0000230557-25-000010 20250331 Common Stock Par Or Stated Value Per Share 2.0000 USD 0 us-gaap/2024
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 28212000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss 25375000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Deferred Income Tax Assets Net 134161000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Employee Related Liabilities Current And Noncurrent 121662000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 841000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 196200000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Measured At Net Asset Value Per Share;
0000230557-25-000010 20240331 Gain Loss On Investments -78000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Gain Loss On Investments -274000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Gain Loss On Sale Of Property Plant Equipment 0.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Goodwill 7849000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Held To Maturity Securities 25310000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 24735000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 24800000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 102566000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 10682000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 2037000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Income Tax Expense Benefit -17000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Income Tax Expense Benefit -5712000.0000 USD 1 us-gaap/2024 Consolidation Items= Corporate Non Segment;
0000230557-25-000010 20250331 Income Tax Expense Benefit 183000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Increase Decrease In Premiums Receivable 71936000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance 81686000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Investments 10295310000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Liabilities 10939023000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 294654000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A5.375 Senior Notes Due2049;
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 904095000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= Long Term Debt Excluding Issuance Costs;
0000230557-25-000010 20250331 Net Income Loss 95802000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Net Income Loss 36053000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Net Income Loss -497000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Net Income Loss Available To Common Stockholders Diluted 107596000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Net Investment Income 2794000.0000 USD 1 us-gaap/2024 Investment Type= Commercial Mortgage Loans;
0000230557-25-000010 20240331 Net Investment Income 4908000.0000 USD 1 us-gaap/2024 Investment Type= Equity Securities;
0000230557-25-000010 20250331 O C I Reclassification Adjustment From A O C I For Write Down Of Securities Net Of Tax -216000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Other Short Term Investments 630818000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20240331 Other Underwriting Expense 115987000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Underwriting Expense 124870000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Underwriting Expense 671000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Payments Of Debt Issuance Costs 4000000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Payments Of Dividends Preferred Stock And Preference Stock 2300000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 746325000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations;
0000230557-25-000010 20241231 Preferred Stock Shares Issued 8000.0000 shares 0 us-gaap/2024
0000230557-25-000010 20231231 Preferred Stock Shares Outstanding 8000.0000 shares 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20240331 Preferred Stock Shares Outstanding 8000.0000 shares 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20241231 Preferred Stock Value 200000000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 39921000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Business Owners Policies;
0000230557-25-000010 20250331 Premiums Earned Net 103655000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines;
0000230557-25-000010 20241231 Premiums Receivable At Carrying Value 1467806000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Premiums Receivable At Carrying Value 1539742000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Equity Investments In Excess Of Current Year Earnings 5148000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20240331 Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options 885000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Property Plant And Equipment Net 93303000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Revenues 841244000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Revenues 104486000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines;
0000230557-25-000010 20240331 Revenues 104486000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Share Based Compensation 12823000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Shares Paid For Tax Withholding For Share Based Compensation 69068.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20241231 Stockholders Equity 557042000.0000 USD 0 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20250331 Stockholders Equity 211673000.0000 USD 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Stock Issued During Period Shares Share Based Compensation 220856.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Stock Issued During Period Value Dividend Reinvestment Plan 12000.0000 USD 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Treasury Stock Common Shares 45063439.0000 shares 0 us-gaap/2024
0000230557-25-000010 20241231 Treasury Stock Value 650829000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Accrued Investment Income Receivable 76892000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Accrued Investment Income Receivable 77110000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Accumulated Other Comprehensive Income Loss Net Of Tax -272068000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Alternative Investment 440896000.0000 USD 0 us-gaap/2024 Investment Type= Partnership Interest;
0000230557-25-000010 20250331 Alternative Investment 411111000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Alternative Investment 411111000.0000 USD 0 us-gaap/2024 Investment Type= Partnership Interest;
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 2065611000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 1812744000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 8871026000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 1943238000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 35518000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 443804000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 10388000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Cash 91000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents 63024000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect -1428000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Commitments And Contingencies USD 0 us-gaap/2024
0000230557-25-000010 20250331 Common Stock Shares Outstanding 60772988.0000 shares 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20240331 Current Federal Tax Expense Benefit 21413000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Current Federal Tax Expense Benefit 33593000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 30381000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 15442000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 31948000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 14924000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 5499000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 19000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Deferred Policy Acquisition Costs 479304000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Earnings Per Share Diluted 1.3100 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 808000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20241231 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Nonredeemable Preferred Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 266471000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Equity Securities Fv Ni Cost 263305000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 24800000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 13985000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 120920000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Equity Method Investments Net Of Dividends Or Distributions 5006000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Income Tax Expense Benefit 20048000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Income Tax Expense Benefit 21866000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Income Tax Expense Benefit 3997000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Tax Expense Benefit 34702000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Increase Decrease In Interest And Dividends Receivable 201000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Increase Decrease In Other Operating Liabilities -7816000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 60000000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A3.03 F H L B I Due2026;
0000230557-25-000010 20240331 Net Income Loss 15034000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Net Income Loss -61000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Net Income Loss 82518000.0000 USD 1 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20250331 Net Income Loss 689000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Net Income Loss -216000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Net Income Loss 109896000.0000 USD 1 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20240331 Net Investment Income 263000.0000 USD 1 us-gaap/2024 Investment Type= Other Investments;
0000230557-25-000010 20250331 Net Investment Income 3567000.0000 USD 1 us-gaap/2024 Investment Type= Equity Securities;
0000230557-25-000010 20250331 Operating Costs And Expenses 18098000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax -12293000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Other Income 640000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Miscellaneous Income;
0000230557-25-000010 20241231 Other Liabilities 538738000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Other Short Term Investments 474225000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20240331 Payments For Repurchase Of Common Stock 6697000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments To Acquire Available For Sale Securities Debt 861837000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Payments To Acquire Equity Securities Fv Ni 6473000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments To Acquire Mortgage Notes Receivable 32332000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments To Acquire Short Term Investments 4802547000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 704292000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 273415000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= General Liability;
0000230557-25-000010 20240331 Premiums Earned Net 87777000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Workers Compensation;
0000230557-25-000010 20250331 Premiums Earned Net 1158757000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Premiums Earned Net 13258000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Surety Segment;
0000230557-25-000010 20241231 Premiums Receivable Allowance For Doubtful Accounts 20400000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options 787000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities 262911000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities 2404000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Sale Of Available For Sale Securities Debt 219889000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Retained Earnings Accumulated Deficit 3139489000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Revenues 917070000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines;
0000230557-25-000010 20231231 Stockholders Equity 210447000.0000 USD 0 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20231231 Stockholders Equity 3029396000.0000 USD 0 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20241231 Stockholders Equity -178057000.0000 USD 0 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent;
0000230557-25-000010 20241231 Stockholders Equity 3139489000.0000 USD 0 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20250331 Stockholders Equity -123558000.0000 USD 0 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent;
0000230557-25-000010 20240331 Treasury Stock Value Acquired Cost Method 0.0000 USD 1 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20241231 Accrued Income Taxes 19706000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Accrued Investment Income Receivable 74600000.0000 USD 0 us-gaap/2024 Investment Type= Debt Securities Available For Sale;
0000230557-25-000010 20250331 Alternative Investment 322644000.0000 USD 0 us-gaap/2024 Investment Type= Private Equity Funds;
0000230557-25-000010 20241231 Assets 13514189000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 10656000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 761771000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 151030000.0000 USD 0 us-gaap/2024 Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 752620000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 2825501000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 8127334000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 752960000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 752960000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 1692358000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 8605175000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 2996304000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 412802000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 1852079000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 3237221000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Common Stock Par Or Stated Value Per Share 2.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Common Stock Shares Issued 105836427.0000 shares 0 us-gaap/2024
0000230557-25-000010 20250331 Common Stock Value 211673000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 0.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 419000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 0.0000 USD 0 us-gaap/2024 Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20241231 Equity Securities Fv Ni 213601000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 41445000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20240331 Finance Lease Principal Payments 731000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Finance Lease Principal Payments 701000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 24735000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 24800000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 19031000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 166557000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Increase Decrease In Deferred Policy Acquisition Costs 23476000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Increase Decrease In Income Taxes 18979000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance 105677000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Interest Expense Debt 9573000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 903232000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Net Income Loss 82518000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Net Income Loss 84348000.0000 USD 1 us-gaap/2024 Business Segments= Investment Segment; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Net Income Loss 99382000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Net Income Loss 2796000.0000 USD 1 us-gaap/2024 Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Net Investment Income 6881000.0000 USD 1 us-gaap/2024 Investment Type= Partnership Interest;
0000230557-25-000010 20250331 Net Investment Income 105082000.0000 USD 1 us-gaap/2024 Investment Type= Fixed Maturities;
0000230557-25-000010 20250331 Net Investment Income 7079000.0000 USD 1 us-gaap/2024 Investment Type= Partnership Interest;
0000230557-25-000010 20241231 Notes Receivable Gross 233774000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Notes Receivable Gross 257846000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent 64777000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent 54499000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale Without Allowance For Credit Loss Parent;
0000230557-25-000010 20250331 Other Investments 98405000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Other Liabilities 564678000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Other Short Term Investments 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20240331 Payments To Acquire Held To Maturity Securities 0.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 64115000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 87990000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 746325000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20241231 Preferred Stock Par Or Stated Value Per Share 0.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Preferred Stock Shares Issued 8000.0000 shares 0 us-gaap/2024
0000230557-25-000010 20240331 Premiums Earned Net 112988000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines;
0000230557-25-000010 20240331 Premiums Earned Net 161553000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Commercial Property;
0000230557-25-000010 20240331 Premiums Earned Net 44113000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Homeowners;
0000230557-25-000010 20240331 Premiums Earned Net 2773000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Other Personal;
0000230557-25-000010 20250331 Premiums Earned Net 79036000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Workers Compensation;
0000230557-25-000010 20250331 Proceeds From Debt Net Of Issuance Costs 395900000.0000 USD 1 us-gaap/2024 Longterm Debt Type= A5.90 Senior Notes;
0000230557-25-000010 20240331 Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities 193109000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Sale And Collection Of Mortgage Notes Receivable 2812000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Sale And Collection Of Mortgage Notes Receivable 8260000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Reinsurance Recoverables On Paid And Unpaid Losses 924944000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Restricted Cash 108170000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Revenues 113015000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Revenues 841244000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines;
0000230557-25-000010 20240331 Revenues 1164959000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Revenues 142969000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines;
0000230557-25-000010 20240331 Share Based Compensation 10115000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20231231 Stockholders Equity -373001000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Stockholders Equity 200000000.0000 USD 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20240331 Stockholders Equity 3088150000.0000 USD 0 us-gaap/2024 Equity Components= Retained Earnings;
0000230557-25-000010 20241231 Stockholders Equity 200000000.0000 USD 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20250331 Stockholders Equity -62617000.0000 USD 0 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent;
0000230557-25-000010 20250331 Stock Issued During Period Shares Dividend Reinvestment Plan 6207.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20240331 Stock Issued During Period Shares New Issues 0.0000 shares 1 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20240331 Stock Issued During Period Shares Share Based Compensation 219264.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Unearned Premiums 2698499000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 11535000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 7473377000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 1665155000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 84637000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 3068180000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 240917000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 2197185000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 1852079000.0000 USD 0 us-gaap/2024 Financial Instrument= Residential Mortgage Backed Securities;
0000230557-25-000010 20231231 Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents 13272000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Commercial Mortgage Loan Fair Value 0.0000 USD 0 0000230557-25-000010 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1;
0000230557-25-000010 20241231 Commitments And Contingencies USD 0 us-gaap/2024
0000230557-25-000010 20250331 Common Stock Shares Authorized 360000000.0000 shares 0 us-gaap/2024
0000230557-25-000010 20241231 Common Stock Shares Issued 105609364.0000 shares 0 us-gaap/2024
0000230557-25-000010 20240331 Debt Securities Available For Sale Allowance For Credit Loss 2627000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 21000.0000 USD 0 us-gaap/2024 Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20240331 Deferred Federal Income Tax Expense Benefit -1365000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Earnings Per Share Diluted 1.7600 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Equity Securities Fv Ni 211767000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 69423000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Equity Securities Fv Ni 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20241231 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 10381000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 967000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Income Tax Expense Benefit 25863000.0000 USD 1 us-gaap/2024 Consolidation Items= Operating Segments;
0000230557-25-000010 20240331 Income Tax Expense Benefit 203000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Income Tax Expense Benefit -132000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20241231 Liabilities 10394113000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Liabilities And Stockholders Equity 13514189000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Liability For Claims And Claims Adjustment Expense 5501750000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 49931000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A7.25 Senior Notes Due2034;
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 399912000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A5.90 Senior Notes;
0000230557-25-000010 20250331 Long Term Debt And Capital Lease Obligations Including Current Maturities 99597000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Basis= Carrying Reported Amount Fair Value Disclosure; Longterm Debt Type= A6.70 Senior Notes Due2035;
0000230557-25-000010 20240331 Net Cash Provided By Used In Operating Activities 114206000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Income Loss -24000.0000 USD 1 us-gaap/2024 Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Net Income Loss Available To Common Stockholders Basic 80218000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Net Investment Income 94102000.0000 USD 1 us-gaap/2024 Investment Type= Fixed Maturities;
0000230557-25-000010 20250331 Net Investment Income 6233000.0000 USD 1 us-gaap/2024 Investment Type= Short Term Investments;
0000230557-25-000010 20241231 Other Assets 231403000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent -12735000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent -689000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax -764000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Other Income 7134000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Miscellaneous Income;
0000230557-25-000010 20250331 Other Income 5509000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Other Investments 101065000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Other Short Term Investments 509318000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Other Short Term Investments 631090000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20240331 Other Underwriting Expense 745000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Payments Of Dividends Preferred Stock And Preference Stock 2300000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Payments To Acquire Short Term Investments 1232780000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Policyholder Benefits And Claims Incurred Net 555833000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 746325000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 581666000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 76669000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 746325000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Preferred Stock Liquidation Preference 25000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Preferred Stock Shares Outstanding 8000.0000 shares 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20250331 Premiums Earned Net 142892000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines;
0000230557-25-000010 20250331 Premiums Earned Net 85119000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Product Or Service= Casualty Insurance Product Line;
0000230557-25-000010 20250331 Premiums Earned Net 912210000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines;
0000230557-25-000010 20250331 Premiums Earned Net 46893000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Business Owners Policies;
0000230557-25-000010 20250331 Premiums Earned Net 186530000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Commercial Property;
0000230557-25-000010 20250331 Premiums Earned Net 2744000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Other Personal;
0000230557-25-000010 20241231 Premiums Receivable Gross 1488206000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Debt Net Of Issuance Costs 395867000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Proceeds From Equity Investments In Excess Of Current Year Earnings 3266000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Proceeds From Sale Of Short Term Investments 4681279000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Reinsurance Recoverables Allowance 2000000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Reinsurance Recoverables On Paid And Unpaid Losses 1061145000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Revenues 1285186000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Shares Paid For Tax Withholding For Share Based Compensation 68360.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20231231 Stockholders Equity 200000000.0000 USD 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20241231 Stockholders Equity -336845000.0000 USD 0 us-gaap/2024 Equity Components= Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Stockholders Equity 3258540000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Stockholders Equity 200000000.0000 USD 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20250331 Stockholders Equity -676085000.0000 USD 0 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20240331 Stock Issued During Period Value Dividend Reinvestment Plan 488000.0000 USD 1 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20240331 Stock Issued During Period Value Dividend Reinvestment Plan 10000.0000 USD 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20250331 Stock Issued During Period Value Share Based Compensation 442000.0000 USD 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20240331 Treasury Stock Shares Acquired 0.0000 shares 1 us-gaap/2024 Equity Components= Common Stock;
0000230557-25-000010 20241231 Accumulated Depreciation Depletion And Amortization Property Plant And Equipment 287685000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Accumulated Depreciation Depletion And Amortization Property Plant And Equipment 294790000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Adjustments Related To Tax Withholding For Share Based Compensation 6697000.0000 USD 1 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20250331 Adjustments Related To Tax Withholding For Share Based Compensation 5835000.0000 USD 1 us-gaap/2024 Equity Components= Treasury Stock Common;
0000230557-25-000010 20241231 Alternative Investment 52100000.0000 USD 0 us-gaap/2024 Investment Type= Private Credit Funds;
0000230557-25-000010 20241231 Alternative Investment 346020000.0000 USD 0 us-gaap/2024 Investment Type= Private Equity Funds;
0000230557-25-000010 20250331 Available For Sale Debt Securities Amortized Cost Basis 2228290000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 9302000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 2033149000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 96414000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 345000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Foreign Government Debt Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 8605175000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 740877000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Cash 124000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect 45270000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Deferred Federal Income Tax Expense Benefit -4603000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Deferred Policy Acquisition Costs 492492000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Allowance For Loan And Lease Losses Real Estate 98000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Alternative Investment 46294000.0000 USD 0 us-gaap/2024 Investment Type= Private Credit Funds;
0000230557-25-000010 20241231 Available For Sale Debt Securities Amortized Cost Basis 3181046000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 8127334000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 618439000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 340000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20241231 Available For Sale Securities Debt Securities 451230000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 38061000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 740532000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level2; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 661670000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 432950000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 134475000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 2197185000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 740877000.0000 USD 0 us-gaap/2024 Financial Instrument= Commercial Mortgage Backed Securities;
0000230557-25-000010 20250331 Available For Sale Securities Debt Securities 432950000.0000 USD 0 us-gaap/2024 Financial Instrument= U S States And Political Subdivisions;
0000230557-25-000010 20250331 Commercial Mortgage Loan Fair Value 251498000.0000 USD 0 0000230557-25-000010 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3;
0000230557-25-000010 20241231 Common Stock Value 211219000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20231231 Debt Securities Available For Sale Allowance For Credit Loss 12999000.0000 USD 0 us-gaap/2024 Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 4889000.0000 USD 0 us-gaap/2024 Financial Instrument= Asset Backed Securities;
0000230557-25-000010 20241231 Debt Securities Available For Sale Allowance For Credit Loss 0.0000 USD 0 us-gaap/2024 Financial Instrument= U S Treasury And Government;
0000230557-25-000010 20250331 Debt Securities Available For Sale Allowance For Credit Loss 30175000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Debt Securities Availableforsale Allowancefor Credit Loss Net 2093000.0000 USD 1 0000230557-25-000010
0000230557-25-000010 20250331 Debt Securities Held To Maturity Allowance For Credit Loss 0.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Equity Securities Fv Ni 808000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level3; Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Equity Securities Fv Ni 67602000.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Fair Value By Measurement Frequency= Fair Value Measurements Recurring; Financial Instrument= Common Stock;
0000230557-25-000010 20250331 Equity Securities Fv Ni 266471000.0000 USD 0 us-gaap/2024 Fair Value By Measurement Frequency= Fair Value Measurements Recurring;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1;
0000230557-25-000010 20250331 Held To Maturity Securities Fair Value 0.0000 USD 0 us-gaap/2024 Fair Value By Fair Value Hierarchy Level= Fair Value Inputs Level1; Financial Instrument= Corporate Debt Securities;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 45637000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest 872000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Increase Decrease In Employee Related Liabilities -24085000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Increase Decrease In Income Taxes 31850000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Increase Decrease In Interest And Dividends Receivable 2091000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Increase Decrease In Other Operating Assets 7421000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Interest Expense Debt 7181000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Liabilities And Stockholders Equity 14197563000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Liability For Claims And Claims Adjustment Expense 6589801000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Liability For Claims And Claims Adjustment Expense 6610855000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Long Term Debt And Capital Lease Obligations Including Current Maturities 507938000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20241231 Mortgage Loans On Real Estate Commercial And Consumer Net 233708000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Net Income Loss 764000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Net Income Loss 109896000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Income Loss Available To Common Stockholders Basic 107596000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Net Investment Income 107849000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Net Investment Income 3519000.0000 USD 1 us-gaap/2024 Investment Type= Short Term Investments;
0000230557-25-000010 20250331 Net Investment Income 120691000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Net Investment Income 231000.0000 USD 1 us-gaap/2024 Investment Type= Other Investments;
0000230557-25-000010 20240331 Operating Costs And Expenses 15498000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Other Assets 281640000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent -764000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent -11971000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Other Comprehensive Income;
0000230557-25-000010 20250331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent 689000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment;
0000230557-25-000010 20250331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent 64088000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Net Unrealized Investment Gain Loss;
0000230557-25-000010 20250331 Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent 9589000.0000 USD 1 us-gaap/2024 Equity Components= Aoci Gain Loss Debt Securities Available For Sale With Allowance For Credit Loss Parent;
0000230557-25-000010 20240331 Other Income 7801000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20240331 Payments To Acquire Other Investments 12738000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Payments To Acquire Other Investments 22129000.0000 USD 1 us-gaap/2024
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 581666000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 76669000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20250331 Policyholder Benefits And Claims Incurred Net 201000.0000 USD 1 us-gaap/2024 Equity Components= Accumulated Defined Benefit Plans Adjustment; Reclassification Out Of Accumulated Other Comprehensive Income= Reclassification Out Of Accumulated Other Comprehensive Income;
0000230557-25-000010 20240331 Preferred Stock Dividends Per Share Declared 287.5000 USD 1 us-gaap/2024
0000230557-25-000010 20241231 Preferred Stock Shares Outstanding 8000.0000 shares 0 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20240331 Premiums Earned Net 71638000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Product Or Service= Casualty Insurance Product Line;
0000230557-25-000010 20240331 Premiums Earned Net 41350000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Product Or Service= Property Insurance Product Line;
0000230557-25-000010 20240331 Premiums Earned Net 834110000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines;
0000230557-25-000010 20240331 Premiums Earned Net 7636000.0000 USD 1 us-gaap/2024 Business Segments= Standard Commercial Lines; Product Or Service= Other Commercial;
0000230557-25-000010 20240331 Premiums Earned Net 1050944000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations;
0000230557-25-000010 20250331 Premiums Earned Net 57773000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Product Or Service= Property Insurance Product Line;
0000230557-25-000010 20250331 Premiums Earned Net 47943000.0000 USD 1 us-gaap/2024 Business Segments= Standard Personal Lines; Product Or Service= Homeowners;
0000230557-25-000010 20250331 Premiums Earned Net 1158757000.0000 USD 1 us-gaap/2024 Business Segments= Total Insurance Operations;
0000230557-25-000010 20231231 Premiums Receivable Allowance For Doubtful Accounts 18900000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Premiums Receivable Allowance For Doubtful Accounts 20000000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20250331 Prepaid Reinsurance Premiums 235923000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Proceeds From Sale Of Equity Securities Fv Ni 0.0000 USD 1 us-gaap/2024
0000230557-25-000010 20231231 Reinsurance Recoverables Allowance 1700000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Reinsurance Recoverables Allowance 1700000.0000 USD 0 us-gaap/2024
0000230557-25-000010 20240331 Revenues 113015000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines;
0000230557-25-000010 20250331 Revenues 142969000.0000 USD 1 us-gaap/2024 Business Segments= E S Lines; Consolidation Items= Operating Segments;
0000230557-25-000010 20231231 Stockholders Equity 522748000.0000 USD 0 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20250331 Stock Issued During Period Shares New Issues 0.0000 shares 1 us-gaap/2024 Equity Components= Preferred Stock;
0000230557-25-000010 20250331 Stock Issued During Period Value Dividend Reinvestment Plan 508000.0000 USD 1 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20250331 Stock Issued During Period Value Share Based Compensation 13739000.0000 USD 1 us-gaap/2024 Equity Components= Additional Paid In Capital;
0000230557-25-000010 20250331 Treasury Stock Value Acquired Cost Method 19421000.0000 USD 1 us-gaap/2024 Equity Components= Treasury Stock Common;

Description
Field Name Field Description
adsh Accession Number. The 20-character string formed from the 18-digit number assigned by the SEC to each EDGAR submission.
tag The unique identifier (name) for a tag in a specific taxonomy release.
version For a standard tag, an identifier for the taxonomy; otherwise the accession number where the tag was defined.
ddate The end date for the data value, rounded to the nearest month end.
qtrs The count of the number of quarters represented by the data value, rounded to the nearest whole number. “0” indicates it is a point-in-time value.
uom The unit of measure for the value.
segments Tags used to represent axis and member reporting.
coreg If specified, indicates a specific co-registrant, the parent company, or other entity (e.g., guarantor). NULL indicates the consolidated entity.
value The value. This is not scaled, it is as found in the Interactive Data file, but is limited to four digits to the right of the decimal point.
footnote The text of any superscripted footnotes on the value, as shown on the statement page, truncated to 512 characters, or if there is no footnote, then this field will be blank.

Tags

tag version custom abstract datatype iord crdr tlabel doc
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents us-gaap/2024 0 0 monetary I D Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
Debt Securities Available For Sale Allowance For Credit Loss us-gaap/2024 0 0 monetary I C Debt Securities, Available-for-Sale, Allowance for Credit Loss Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Income Loss From Equity Method Investments Net Of Dividends Or Distributions us-gaap/2024 0 0 monetary D C Income (Loss) from Equity Method Investments, Net of Dividends or Distributions This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.
Payments To Acquire Equity Securities Fv Ni us-gaap/2024 0 0 monetary D C Payments to Acquire Equity Securities, FV-NI Amount of cash outflow to acquire investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity.
Payments To Acquire Property Plant And Equipment us-gaap/2024 0 0 monetary D C Payments to Acquire Property, Plant, and Equipment The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
Stock Issued During Period Shares Dividend Reinvestment Plan us-gaap/2024 0 0 shares D Stock Issued During Period, Shares, Dividend Reinvestment Plan Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest us-gaap/2024 0 0 monetary D C Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment us-gaap/2024 0 0 monetary I C Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.
Alternative Investment us-gaap/2024 0 0 monetary I D Alternative Investment Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.
Comprehensive Income Net Of Tax us-gaap/2024 0 0 monetary D C Comprehensive Income (Loss), Net of Tax, Attributable to Parent Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
Deferred Income Tax Assets Net us-gaap/2024 0 0 monetary I D Deferred Income Tax Assets, Net Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.
Deferred Policy Acquisition Costs us-gaap/2024 0 0 monetary I D Deferred Policy Acquisition Cost Amount of deferred policy acquisition cost capitalized on contract remaining in force.
Equity Securities Fv Ni us-gaap/2024 0 0 monetary I D Equity Securities, FV-NI, Current Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.
Increase Decrease In Premiums Receivable us-gaap/2024 0 0 monetary D C Increase (Decrease) in Premiums Receivable The change in the premium receivable balance on the balance sheet.
Liabilities us-gaap/2024 0 0 monetary I C Liabilities Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others.
Gain Loss On Investments us-gaap/2024 0 0 monetary D C Gain (Loss) on Investments Amount of realized and unrealized gain (loss) on investment.
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax us-gaap/2024 0 0 monetary D C OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.
Other Income us-gaap/2024 0 0 monetary D C Other Income Amount of revenue and income classified as other.
Payments To Acquire Mortgage Notes Receivable us-gaap/2024 0 0 monetary D C Payments to Acquire Mortgage Notes Receivable The cash outflow from the purchase of receivables arising from the mortgage note on real estate.
Liabilities And Stockholders Equity us-gaap/2024 0 0 monetary I C Liabilities and Equity Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.
Proceeds From Sale And Collection Of Mortgage Notes Receivable us-gaap/2024 0 0 monetary D D Proceeds from Sale and Collection of Mortgage Notes Receivable The cash inflow from proceeds from sale of receivables arising from the mortgage note on real estate; includes collections on mortgage notes receivable that are not classified as operating cash flows.
Reinsurance Recoverables Allowance us-gaap/2024 0 0 monetary I C Reinsurance Recoverable, Allowance for Credit Loss Amount of allowance for credit loss on reinsurance recoverable.
Reinsurance Recoverables On Unpaid Losses Gross us-gaap/2024 0 0 monetary I D Reinsurance Recoverables on Unpaid Losses, Gross Amount before valuation allowance of reinsurance recoverables for losses reported to the ceding insurer but not yet paid, and for amounts expected based upon statistical projections and other measures of incurred losses and loss settlement expenses which have not yet been reported to the ceding insurer.
Retained Earnings Accumulated Deficit us-gaap/2024 0 0 monetary I C Retained Earnings (Accumulated Deficit) Amount of accumulated undistributed earnings (deficit).
O C I Reclassification Adjustment From A O C I For Write Down Of Securities Net Of Tax 0000230557-25-000010 1 0 monetary D C OCI, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized amounts realized upon: (i) the disposal of; or (ii) the intent-to-sell write-down, of available-for-sale securities.
Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities us-gaap/2024 0 0 monetary D D Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity.
Held To Maturity Securities Fair Value us-gaap/2024 0 0 monetary I D Debt Securities, Held-to-Maturity, Fair Value Fair value of investment in debt security measured at amortized cost (held-to-maturity).
Adjustments Related To Tax Withholding For Share Based Compensation us-gaap/2024 0 0 monetary D D Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.
Available For Sale Securities Debt Securities us-gaap/2024 0 0 monetary I D Debt Securities, Available-for-Sale Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Common Stock Dividends Per Share Declared us-gaap/2024 0 0 perShare D Common Stock, Dividends, Per Share, Declared Aggregate dividends declared during the period for each share of common stock outstanding.
Common Stock Par Or Stated Value Per Share us-gaap/2024 0 0 perShare I Common Stock, Par or Stated Value Per Share Face amount or stated value per share of common stock.
Common Stock Shares Outstanding us-gaap/2024 0 0 shares I Common Stock, Shares, Outstanding Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
Income Tax Expense Benefit us-gaap/2024 0 0 monetary D D Income Tax Expense (Benefit) Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
Net Income Loss us-gaap/2024 0 0 monetary D C Net Income (Loss) Attributable to Parent The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent us-gaap/2024 0 0 monetary D C Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Amount, after tax and reclassification adjustment, of gain (loss) in value of unsold investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent.
Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent us-gaap/2024 0 0 monetary D D Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.
Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax us-gaap/2024 0 0 monetary D D Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Amount, after tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.
Payments Of Debt Issuance Costs us-gaap/2024 0 0 monetary D C Payments of Debt Issuance Costs The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital us-gaap/2024 0 0 monetary D D Proceeds from Equity Method Investment, Distribution, Return of Capital Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.
Stockholders Equity us-gaap/2024 0 0 monetary I C Equity, Attributable to Parent Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.
Stock Issued During Period Value Share Based Compensation us-gaap/2024 0 0 monetary D C Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).
Treasury Stock Value us-gaap/2024 0 0 monetary I D Treasury Stock, Value The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.
Unrealized Gains Losses On Securities With Credit Loss Recognized In Earnings Net 0000230557-25-000010 1 0 monetary D C Unrealized Gains (Losses) On Securities With Credit Loss Recognized In Earnings, Net Amount, after tax and before reclassification adjustment, of unrealized holding gain (loss) on investments in debt securities having credit losses recognized in the consolidated statement of income, and includes non-credit changes on debt securities currently having credit losses.
Commercial Mortgage Loan Fair Value 0000230557-25-000010 1 0 monetary I D Commercial Mortgage Loan, Fair Value Fair value of investment in commercial loan measured at original cost.
Accumulated Other Comprehensive Income Loss Net Of Tax us-gaap/2024 0 0 monetary I C Accumulated Other Comprehensive Income (Loss), Net of Tax Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.
Assets us-gaap/2024 0 0 monetary I D Assets Amount of asset recognized for present right to economic benefit.
Cash us-gaap/2024 0 0 monetary I D Cash Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.
Common Stock Shares Issued us-gaap/2024 0 0 shares I Common Stock, Shares, Issued Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.
Depreciation Amortization And Accretion Net us-gaap/2024 0 0 monetary D D Depreciation, Amortization and Accretion, Net The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.
Earnings Per Share Diluted us-gaap/2024 0 0 perShare D Earnings Per Share, Diluted The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.
Employee Related Liabilities Current And Noncurrent us-gaap/2024 0 0 monetary I C Employee-related Liabilities Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.
Equity Securities Fv Ni Cost us-gaap/2024 0 0 monetary I D Equity Securities, FV-NI, Cost Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.
Net Income Loss Available To Common Stockholders Diluted us-gaap/2024 0 0 monetary D C Net Income (Loss) Available to Common Stockholders, Diluted Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.
Notes Receivable Gross us-gaap/2024 0 0 monetary I D Financing Receivable, before Allowance for Credit Loss Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.
Policyholder Benefits And Claims Incurred Net us-gaap/2024 0 0 monetary D D Policyholder Benefits and Claims Incurred, Net Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred.
Premiums Receivable At Carrying Value us-gaap/2024 0 0 monetary I D Premiums Receivable, Net The carrying amount as of the balance sheet date due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, net of the allowance for doubtful accounts.
Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options us-gaap/2024 0 0 monetary D D Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised.
Unearned Premiums us-gaap/2024 0 0 monetary I C Unearned Premiums Carrying amount of premiums written on insurance contracts that have not been earned as of the balance sheet date.
Stock Issued During Period Value Dividend Reinvestment Plan us-gaap/2024 0 0 monetary D C Stock Issued During Period, Value, Dividend Reinvestment Plan Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity.
Dividends Common Stock us-gaap/2024 0 0 monetary D D Dividends, Common Stock Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).
Finance Lease Principal Payments us-gaap/2024 0 0 monetary D C Finance Lease, Principal Payments Amount of cash outflow for principal payment on finance lease.
Increase Decrease In Other Operating Assets us-gaap/2024 0 0 monetary D C Increase (Decrease) in Other Operating Assets Amount of increase (decrease) in operating assets classified as other.
Payments To Acquire Available For Sale Securities Debt us-gaap/2024 0 0 monetary D C Payments to Acquire Debt Securities, Available-for-Sale Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Payments To Acquire Other Investments us-gaap/2024 0 0 monetary D C Payments to Acquire Other Investments Amount of cash outflow to acquire investments classified as other.
Preferred Stock Shares Issued us-gaap/2024 0 0 shares I Preferred Stock, Shares Issued Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt.
Share Based Compensation us-gaap/2024 0 0 monetary D D Share-Based Payment Arrangement, Noncash Expense Amount of noncash expense for share-based payment arrangement.
Benefits Losses And Expenses us-gaap/2024 0 0 monetary D D Benefits, Losses and Expenses The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.
Deferred Federal Income Tax Expense Benefit us-gaap/2024 0 0 monetary D D Deferred Federal Income Tax Expense (Benefit) Amount of deferred federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, deferred national tax expense (benefit) for non-US (United States of America) jurisdiction.
Increase Decrease In Employee Related Liabilities us-gaap/2024 0 0 monetary D D Increase (Decrease) in Employee Related Liabilities The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.
Increase Decrease In Other Operating Liabilities us-gaap/2024 0 0 monetary D D Increase (Decrease) in Other Operating Liabilities Amount of increase (decrease) in operating liabilities classified as other.
Interest Expense Debt us-gaap/2024 0 0 monetary D D Interest Expense, Debt Amount of the cost of borrowed funds accounted for as interest expense for debt.
Preferred Stock Value us-gaap/2024 0 0 monetary I C Preferred Stock, Value, Issued Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.
Premiums Earned Net us-gaap/2024 0 0 monetary D C Premiums Earned, Net Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned.
Proceeds From Debt Net Of Issuance Costs us-gaap/2024 0 0 monetary D D Proceeds from Debt, Net of Issuance Costs The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.
Proceeds From Sale Of Short Term Investments us-gaap/2024 0 0 monetary D D Proceeds from Sale of Short-Term Investments The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.
Treasury Stock Shares Acquired us-gaap/2024 0 0 shares D Treasury Stock, Shares, Acquired Number of shares that have been repurchased during the period and are being held in treasury.
Accrued Investment Income Receivable us-gaap/2024 0 0 monetary I D Accrued Investment Income Receivable Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.
Available For Sale Debt Securities Amortized Cost Basis us-gaap/2024 0 0 monetary I D Debt Securities, Available-for-Sale, Amortized Cost Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Deferred Policy Acquisition Cost Amortization Expense us-gaap/2024 0 0 monetary D D Deferred Policy Acquisition Costs, Amortization Expense Amount of amortization expense (reversal of expense) for deferred policy acquisition costs.
Goodwill us-gaap/2024 0 0 monetary I D Goodwill Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
Held To Maturity Securities us-gaap/2024 0 0 monetary I D Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).
Liability For Claims And Claims Adjustment Expense us-gaap/2024 0 0 monetary I C Liability for Claims and Claims Adjustment Expense The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.
Net Cash Provided By Used In Operating Activities us-gaap/2024 0 0 monetary D Net Cash Provided by (Used in) Operating Activities Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
Other Short Term Investments us-gaap/2024 0 0 monetary I D Other Short-Term Investments Amount of short-term investments classified as other.
Other Underwriting Expense us-gaap/2024 0 0 monetary D D Other Underwriting Expense Costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with and are not primarily related to the acquisition or renewal of insurance contracts.
Proceeds From Sale Of Equity Securities Fv Ni us-gaap/2024 0 0 monetary D D Proceeds from Sale of Equity Securities, FV-NI Amount of cash inflow from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity.
Restricted Cash us-gaap/2024 0 0 monetary I D Restricted Cash Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.
Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance 0000230557-25-000010 1 0 monetary D D Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance Change during the period in the unearned portion of premiums written, net of prepaid reinsurance. Premiums written are initially booked as unearned premiums and are recognized as revenue over the known or estimated life of the policy
Accrued Income Taxes us-gaap/2024 0 0 monetary I C Accrued Income Taxes Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.
Allowance For Loan And Lease Losses Real Estate us-gaap/2024 0 0 monetary I C Allowance for Loan and Lease Losses, Real Estate The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect us-gaap/2024 0 0 monetary D D Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
Common Stock Value us-gaap/2024 0 0 monetary I C Common Stock, Value, Issued Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.
Current Federal Tax Expense Benefit us-gaap/2024 0 0 monetary D D Current Federal Tax Expense (Benefit) Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction.
Dividends Preferred Stock Cash us-gaap/2024 0 0 monetary D D Dividends, Preferred Stock, Cash Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.
Increase Decrease In Interest And Dividends Receivable us-gaap/2024 0 0 monetary D C Increase (Decrease) in Interest and Dividends Receivable The increase (decrease) during the reporting period in the aggregate amount due to the entity in the form of unpaid interest and dividends.
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent us-gaap/2024 0 0 monetary D C Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Amount after tax of other comprehensive income (loss) attributable to parent entity.
Revenues us-gaap/2024 0 0 monetary D C Revenues Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).
Stock Issued During Period Shares New Issues us-gaap/2024 0 0 shares D Stock Issued During Period, Shares, New Issues Number of new stock issued during the period.
Additional Paid In Capital Common Stock us-gaap/2024 0 0 monetary I C Additional Paid in Capital, Common Stock Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.
Commitments And Contingencies us-gaap/2024 0 0 monetary I C Commitments and Contingencies Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.
Common Stock Shares Authorized us-gaap/2024 0 0 shares I Common Stock, Shares Authorized The maximum number of common shares permitted to be issued by an entity's charter and bylaws.
Debt Securities Held To Maturity Allowance For Credit Loss us-gaap/2024 0 0 monetary I C Debt Securities, Held-to-Maturity, Allowance for Credit Loss Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity).
Gain Loss On Sale Of Property Plant Equipment us-gaap/2024 0 0 monetary D C Gain (Loss) on Disposition of Property Plant Equipment Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.
Long Term Debt And Capital Lease Obligations Including Current Maturities us-gaap/2024 0 0 monetary I C Long-Term Debt and Lease Obligation, Including Current Maturities Amount of long-term debt and lease obligation, including portion classified as current.
Net Cash Provided By Used In Financing Activities us-gaap/2024 0 0 monetary D D Net Cash Provided by (Used in) Financing Activities Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
Net Income Loss Available To Common Stockholders Basic us-gaap/2024 0 0 monetary D C Net Income (Loss) Available to Common Stockholders, Basic Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.
Operating Costs And Expenses us-gaap/2024 0 0 monetary D D Operating Costs and Expenses Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.
Other Liabilities us-gaap/2024 0 0 monetary I C Other Liabilities Amount of liabilities classified as other.
Payments For Repurchase Of Common Stock us-gaap/2024 0 0 monetary D C Payments for Repurchase of Common Stock The cash outflow to reacquire common stock during the period.
Payments To Acquire Held To Maturity Securities us-gaap/2024 0 0 monetary D C Payments to Acquire Held-to-Maturity Securities Amount of cash outflow through purchase of long-term held-to-maturity securities.
Preferred Stock Par Or Stated Value Per Share us-gaap/2024 0 0 perShare I Preferred Stock, Par or Stated Value Per Share Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.
Premiums Receivable Allowance For Doubtful Accounts us-gaap/2024 0 0 monetary I C Premium Receivable, Allowance for Credit Loss The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value.
Prepaid Reinsurance Premiums us-gaap/2024 0 0 monetary I D Prepaid Reinsurance Premiums The unexpired portion of premiums ceded on policies in force as of the balance sheet date.
Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities us-gaap/2024 0 0 monetary D D Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Proceeds From Sale Of Available For Sale Securities Debt us-gaap/2024 0 0 monetary D D Proceeds from Sale of Debt Securities, Available-for-Sale Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Shares Paid For Tax Withholding For Share Based Compensation us-gaap/2024 0 0 shares D Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.
Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss us-gaap/2024 0 0 monetary I D Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).
Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables 0000230557-25-000010 1 0 monetary D D Increase (Decrease) In Reserves For Losses And Loss Expenses, Net Of Reinsurance Recoverables The net change during the reporting period in the reserve account established to account for expected losses net of reinsurance recoverables.
Earnings Per Share Basic us-gaap/2024 0 0 perShare D Earnings Per Share, Basic The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.
Preferred Stock Dividends Per Share Declared us-gaap/2024 0 0 perShare D Preferred Stock, Dividends Per Share, Declared Aggregate dividends declared during the period for each share of preferred stock outstanding.
Increase Decrease In Income Taxes us-gaap/2024 0 0 monetary D D Increase (Decrease) in Income Taxes The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes, and in deferred and other tax liabilities and assets.
Preferred Stock Dividends Income Statement Impact us-gaap/2024 0 0 monetary D D Preferred Stock Dividends, Income Statement Impact The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.
Net Cash Provided By Used In Investing Activities us-gaap/2024 0 0 monetary D D Net Cash Provided by (Used in) Investing Activities Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
Net Investment Income us-gaap/2024 0 0 monetary D C Net Investment Income Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.
Other Investments us-gaap/2024 0 0 monetary I D Other Investments Amount of investments classified as other.
Preferred Stock Shares Authorized us-gaap/2024 0 0 shares I Preferred Stock, Shares Authorized The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.
Preferred Stock Shares Outstanding us-gaap/2024 0 0 shares I Preferred Stock, Shares Outstanding Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.
Premiums Receivable Gross us-gaap/2024 0 0 monetary I D Premiums Receivable, Gross Gross amount, as of the balance sheet date, due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, before deducting the allowance for doubtful accounts.
Reinsurance Recoverables On Paid And Unpaid Losses us-gaap/2024 0 0 monetary I D Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments Amount, after valuation allowance, recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, policy benefits and policy reserves. Excludes premiums paid under reinsurance contracts.
Stock Issued During Period Value New Issues us-gaap/2024 0 0 monetary D C Stock Issued During Period, Value, New Issues Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.
Increase Decrease In Deferred Policy Acquisition Costs us-gaap/2024 0 0 monetary D C Increase (Decrease) in Deferred Policy Acquisition Costs The increase (decrease) during the reporting period in the balance sheet value of capitalized sales costs that are associated with acquiring a new insurance customers.
Debt Securities Availableforsale Allowancefor Credit Loss Net 0000230557-25-000010 1 0 monetary D C Debt Securities, Available-for-sale, Allowance for Credit Loss, Net Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized amounts realized upon a credit-related impairment loss.
Proceeds From Equity Investments In Excess Of Current Year Earnings 0000230557-25-000010 1 0 monetary D D Proceeds From Equity Investments, In Excess Of Current Year Earnings Proceeds From Equity Investments, In Excess Of Current Year Earnings
Mortgage Loans On Real Estate Commercial And Consumer Net us-gaap/2024 0 0 monetary I D Mortgage Loans on Real Estate, Commercial and Consumer, Net The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.
Investments us-gaap/2024 0 0 monetary I D Investments Sum of the carrying amounts as of the balance sheet date of all investments.
Other Assets us-gaap/2024 0 0 monetary I D Other Assets Amount of assets classified as other.
Payments Of Dividends Common Stock us-gaap/2024 0 0 monetary D C Payments of Ordinary Dividends, Common Stock Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.
Payments Of Dividends Preferred Stock And Preference Stock us-gaap/2024 0 0 monetary D C Payments of Ordinary Dividends, Preferred Stock and Preference Stock Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity.
Payments To Acquire Short Term Investments us-gaap/2024 0 0 monetary D C Payments to Acquire Short-Term Investments The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.
Preferred Stock Liquidation Preference us-gaap/2024 0 0 perShare I Preferred Stock, Liquidation Preference Per Share The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.
Property Plant And Equipment Net us-gaap/2024 0 0 monetary I D Property, Plant and Equipment, Net Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
Stock Issued During Period Shares Share Based Compensation us-gaap/2024 0 0 shares D Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).
Treasury Stock Common Shares us-gaap/2024 0 0 shares I Treasury Stock, Common, Shares Number of previously issued common shares repurchased by the issuing entity and held in treasury.
Treasury Stock Value Acquired Cost Method us-gaap/2024 0 0 monetary D D Treasury Stock, Value, Acquired, Cost Method Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Description
Field Name Field Description
tag The unique identifier (name) for a tag in a specific taxonomy release.
version For a standard tag, an identifier for the taxonomy; otherwise the accession number where the tag was defined.
custom 1 if tag is custom (version=adsh), 0 if it is standard. Note: This flag is technically redundant with the version and adsh columns.
abstract 1 if the tag is not used to represent a numeric fact.
datatype If abstract=1, then NULL, otherwise the data type (e.g., monetary) for the tag.
iord If abstract=1, then NULL; otherwise, “I” if the value is a point-in time, or “D” if the value is a duration.
crdr If datatype = monetary, then the tag’s natural accounting balance (debit or credit); if not defined, then NULL.
tlabel If a standard tag, then the label text provided by the taxonomy, otherwise the text provided by the filer. A tag which had neither would have a NULL value here.
doc The detailed definition for the tag. If a standard tag, then the text provided by the taxonomy, otherwise the text assigned by the filer. Some tags have neither, and this field is NULL.

Presentation of Statements

adsh report line stmt inpth rfile tag version plabel negating
0000230557-25-000010 2 3 BS 0 H Held To Maturity Securities us-gaap/2024 Fixed income securities, held-to-maturity at carrying value (fair value: $24,800 2025; $24,735 2024) 0
0000230557-25-000010 2 4 BS 0 H Debt Securities Held To Maturity Allowance For Credit Loss us-gaap/2024 Less: allowance for credit losses 1
0000230557-25-000010 2 5 BS 0 H Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss us-gaap/2024 Fixed income securities, held-to-maturity, net of allowance for credit losses 0
0000230557-25-000010 2 6 BS 0 H Available For Sale Securities Debt Securities us-gaap/2024 Fixed income securities, available-for-sale at fair value (allowance for credit losses: $30,175 2025 and $31,948 2024; amortized cost: $8,871,026 2025 and $8,476,078 2024) 0
0000230557-25-000010 2 7 BS 0 H Notes Receivable Gross us-gaap/2024 Commercial mortgage loans at carrying value (fair value: $251,498 2025 and $224,842 2024) 0
0000230557-25-000010 2 8 BS 0 H Allowance For Loan And Lease Losses Real Estate us-gaap/2024 Less: allowance for credit losses 1
0000230557-25-000010 2 9 BS 0 H Mortgage Loans On Real Estate Commercial And Consumer Net us-gaap/2024 Commercial mortgage loans, net of allowance for credit losses 0
0000230557-25-000010 2 10 BS 0 H Equity Securities Fv Ni us-gaap/2024 Equity securities at fair value (cost: $263,305 2025; $211,486 2024) 0
0000230557-25-000010 2 11 BS 0 H Other Short Term Investments us-gaap/2024 Short-term investments 0
0000230557-25-000010 2 12 BS 0 H Alternative Investment us-gaap/2024 Alternative investments 0
0000230557-25-000010 2 13 BS 0 H Other Investments us-gaap/2024 Other investments 0
0000230557-25-000010 2 14 BS 0 H Investments us-gaap/2024 Total investments (Note 4 and 5) 0
0000230557-25-000010 2 15 BS 0 H Cash us-gaap/2024 Cash 0
0000230557-25-000010 2 16 BS 0 H Restricted Cash us-gaap/2024 Restricted cash 0
0000230557-25-000010 2 17 BS 0 H Accrued Investment Income Receivable us-gaap/2024 Accrued investment income 0
0000230557-25-000010 2 18 BS 0 H Premiums Receivable Gross us-gaap/2024 Premiums receivable 0
0000230557-25-000010 2 19 BS 0 H Premiums Receivable Allowance For Doubtful Accounts us-gaap/2024 Less: allowance for credit losses (Note 6) 1
0000230557-25-000010 2 20 BS 0 H Premiums Receivable At Carrying Value us-gaap/2024 Premiums receivable, net of allowance for credit losses 0
0000230557-25-000010 2 21 BS 0 H Reinsurance Recoverables On Unpaid Losses Gross us-gaap/2024 Reinsurance recoverable 0
0000230557-25-000010 2 22 BS 0 H Reinsurance Recoverables Allowance us-gaap/2024 Less: allowance for credit losses (Note 7) 1
0000230557-25-000010 2 23 BS 0 H Reinsurance Recoverables On Paid And Unpaid Losses us-gaap/2024 Reinsurance recoverable, net of allowance for credit losses 0
0000230557-25-000010 2 24 BS 0 H Prepaid Reinsurance Premiums us-gaap/2024 Prepaid reinsurance premiums 0
0000230557-25-000010 2 25 BS 0 H Deferred Income Tax Assets Net us-gaap/2024 Deferred federal income tax 0
0000230557-25-000010 2 26 BS 0 H Property Plant And Equipment Net us-gaap/2024 Property and equipment at cost, net of accumulated depreciation and amortization of: $294,790 2025; $287,685 2024 0
0000230557-25-000010 2 27 BS 0 H Deferred Policy Acquisition Costs us-gaap/2024 Deferred policy acquisition costs 0
0000230557-25-000010 2 28 BS 0 H Goodwill us-gaap/2024 Goodwill 0
0000230557-25-000010 2 29 BS 0 H Other Assets us-gaap/2024 Other assets 0
0000230557-25-000010 2 30 BS 0 H Assets us-gaap/2024 Total assets 0
0000230557-25-000010 2 33 BS 0 H Liability For Claims And Claims Adjustment Expense us-gaap/2024 Reserve for loss and loss expense (Note 8) 0
0000230557-25-000010 2 34 BS 0 H Unearned Premiums us-gaap/2024 Unearned premiums 0
0000230557-25-000010 2 35 BS 0 H Long Term Debt And Capital Lease Obligations Including Current Maturities us-gaap/2024 Long-term debt 0
0000230557-25-000010 2 36 BS 0 H Accrued Income Taxes us-gaap/2024 Current federal income tax 0
0000230557-25-000010 2 37 BS 0 H Employee Related Liabilities Current And Noncurrent us-gaap/2024 Accrued salaries and benefits 0
0000230557-25-000010 2 38 BS 0 H Other Liabilities us-gaap/2024 Other liabilities 0
0000230557-25-000010 2 39 BS 0 H Liabilities us-gaap/2024 Total liabilities 0
0000230557-25-000010 2 41 BS 0 H Preferred Stock Value us-gaap/2024 Preferred stock 0
0000230557-25-000010 2 42 BS 0 H Common Stock Value us-gaap/2024 Common stock 0
0000230557-25-000010 2 43 BS 0 H Additional Paid In Capital Common Stock us-gaap/2024 Additional paid-in capital 0
0000230557-25-000010 2 44 BS 0 H Retained Earnings Accumulated Deficit us-gaap/2024 Retained earnings 0
0000230557-25-000010 2 45 BS 0 H Accumulated Other Comprehensive Income Loss Net Of Tax us-gaap/2024 Accumulated other comprehensive income (loss) (Note 11) 0
0000230557-25-000010 2 46 BS 0 H Treasury Stock Value us-gaap/2024 Treasury stock at cost (shares: 45,063,439 2025; 44,761,468 2024) 1
0000230557-25-000010 2 47 BS 0 H Stockholders Equity us-gaap/2024 Total stockholders equity 0
0000230557-25-000010 2 48 BS 0 H Commitments And Contingencies us-gaap/2024 Commitments and contingencies 0
0000230557-25-000010 2 49 BS 0 H Liabilities And Stockholders Equity us-gaap/2024 Total liabilities and stockholders equity 0
0000230557-25-000010 3 1 BS 1 H Held To Maturity Securities Fair Value us-gaap/2024 Fixed income securities, held-to-maturity, fair value 0
0000230557-25-000010 3 2 BS 1 H Debt Securities Available For Sale Allowance For Credit Loss us-gaap/2024 Fixed income securities, available-for-sale, allowance for credit loss 0
0000230557-25-000010 3 3 BS 1 H Available For Sale Debt Securities Amortized Cost Basis us-gaap/2024 Fixed income securities, available-for-sale, amortized cost 0
0000230557-25-000010 3 4 BS 1 H Commercial Mortgage Loan Fair Value 0000230557-25-000010 Commercial mortgage loans, fair value 0
0000230557-25-000010 3 5 BS 1 H Equity Securities Fv Ni Cost us-gaap/2024 Equity securities, cost 0
0000230557-25-000010 3 6 BS 1 H Accumulated Depreciation Depletion And Amortization Property Plant And Equipment us-gaap/2024 Property and equipment, accumulated depreciation and amortization 0
0000230557-25-000010 3 7 BS 1 H Preferred Stock Par Or Stated Value Per Share us-gaap/2024 Preferred stock, par or stated value (in dollars per share) 0
0000230557-25-000010 3 8 BS 1 H Preferred Stock Shares Authorized us-gaap/2024 Preferred stock, authorized (in shares) 0
0000230557-25-000010 3 9 BS 1 H Preferred Stock Shares Issued us-gaap/2024 Preferred stock, issued (in shares) 0
0000230557-25-000010 3 10 BS 1 H Preferred Stock Liquidation Preference us-gaap/2024 Preferred stock, liquidation preference (in dollars per share) 0
0000230557-25-000010 3 11 BS 1 H Common Stock Par Or Stated Value Per Share us-gaap/2024 Common stock, par or stated value (in dollars per share) 0
0000230557-25-000010 3 12 BS 1 H Common Stock Shares Authorized us-gaap/2024 Common stock, authorized (in shares) 0
0000230557-25-000010 3 13 BS 1 H Common Stock Shares Issued us-gaap/2024 Common stock, issued (in shares) 0
0000230557-25-000010 3 14 BS 1 H Treasury Stock Common Shares us-gaap/2024 Treasury stock, common (in shares) 0
0000230557-25-000010 4 2 IS 0 H Premiums Earned Net us-gaap/2024 Net premiums earned 0
0000230557-25-000010 4 3 IS 0 H Net Investment Income us-gaap/2024 Net investment income earned 0
0000230557-25-000010 4 4 IS 0 H Gain Loss On Investments us-gaap/2024 Net realized and unrealized investment gains (losses) 0
0000230557-25-000010 4 5 IS 0 H Other Income us-gaap/2024 Other income 0
0000230557-25-000010 4 6 IS 0 H Revenues us-gaap/2024 Total revenues 0
0000230557-25-000010 4 8 IS 0 H Policyholder Benefits And Claims Incurred Net us-gaap/2024 Loss and loss expense incurred 0
0000230557-25-000010 4 9 IS 0 H Deferred Policy Acquisition Cost Amortization Expense us-gaap/2024 Amortization of deferred policy acquisition costs 0
0000230557-25-000010 4 10 IS 0 H Other Underwriting Expense us-gaap/2024 Other insurance expenses 0
0000230557-25-000010 4 11 IS 0 H Interest Expense Debt us-gaap/2024 Interest expense 0
0000230557-25-000010 4 12 IS 0 H Operating Costs And Expenses us-gaap/2024 Corporate expenses 0
0000230557-25-000010 4 13 IS 0 H Benefits Losses And Expenses us-gaap/2024 Total expenses 0
0000230557-25-000010 4 14 IS 0 H Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest us-gaap/2024 Income (loss) before federal income tax 0
0000230557-25-000010 4 16 IS 0 H Current Federal Tax Expense Benefit us-gaap/2024 Current 0
0000230557-25-000010 4 17 IS 0 H Deferred Federal Income Tax Expense Benefit us-gaap/2024 Deferred 0
0000230557-25-000010 4 18 IS 0 H Income Tax Expense Benefit us-gaap/2024 Total federal income tax expense (benefit) 0
0000230557-25-000010 4 19 IS 0 H Net Income Loss us-gaap/2024 Net income (loss) 0
0000230557-25-000010 4 20 IS 0 H Preferred Stock Dividends Income Statement Impact us-gaap/2024 Preferred stock dividends 0
0000230557-25-000010 4 21 IS 0 H Net Income Loss Available To Common Stockholders Basic us-gaap/2024 Net income (loss) available to common stockholders, basic 0
0000230557-25-000010 4 22 IS 0 H Net Income Loss Available To Common Stockholders Diluted us-gaap/2024 Net income (loss) available to common stockholders, diluted 0
0000230557-25-000010 4 24 IS 0 H Earnings Per Share Basic us-gaap/2024 Net income (loss) available to common stockholders - Basic (in dollars per share) 0
0000230557-25-000010 4 25 IS 0 H Earnings Per Share Diluted us-gaap/2024 Net income (loss) available to common stockholders - Diluted (in dollars per share) 0
0000230557-25-000010 5 1 CI 0 H Net Income Loss us-gaap/2024 Net income (loss) 0
0000230557-25-000010 5 4 CI 0 H Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax us-gaap/2024 Unrealized holding gains (losses) arising during period 0
0000230557-25-000010 5 5 CI 0 H Unrealized Gains Losses On Securities With Credit Loss Recognized In Earnings Net 0000230557-25-000010 Unrealized gains (losses) on securities with credit loss recognized in earnings 0
0000230557-25-000010 5 7 CI 0 H O C I Reclassification Adjustment From A O C I For Write Down Of Securities Net Of Tax 0000230557-25-000010 Net realized (gains) losses on disposals and losses on intent-to-sell available-for-sale securities 0
0000230557-25-000010 5 8 CI 0 H Debt Securities Availableforsale Allowancefor Credit Loss Net 0000230557-25-000010 Credit loss (benefit) expense 0
0000230557-25-000010 5 9 CI 0 H Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent us-gaap/2024 Total unrealized gains (losses) on investment securities 0
0000230557-25-000010 5 12 CI 0 H Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax us-gaap/2024 Net actuarial loss 1
0000230557-25-000010 5 13 CI 0 H Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent us-gaap/2024 Total defined benefit pension and post-retirement plans 1
0000230557-25-000010 5 14 CI 0 H Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent us-gaap/2024 Other comprehensive income (loss) 0
0000230557-25-000010 5 15 CI 0 H Comprehensive Income Net Of Tax us-gaap/2024 Comprehensive income (loss) 0
0000230557-25-000010 6 12 EQ 0 H Stockholders Equity us-gaap/2024 Beginning of period 0
0000230557-25-000010 6 13 EQ 0 H Stock Issued During Period Value New Issues us-gaap/2024 Issuance of preferred stock 0
0000230557-25-000010 6 14 EQ 0 H Stock Issued During Period Value Dividend Reinvestment Plan us-gaap/2024 Dividend reinvestment plan 0
0000230557-25-000010 6 15 EQ 0 H Stock Issued During Period Value Share Based Compensation us-gaap/2024 Stock purchase and compensation plans 0
0000230557-25-000010 6 16 EQ 0 H Net Income Loss us-gaap/2024 Net income (loss) 0
0000230557-25-000010 6 17 EQ 0 H Dividends Preferred Stock Cash us-gaap/2024 Dividends to preferred stockholders 1
0000230557-25-000010 6 18 EQ 0 H Dividends Common Stock us-gaap/2024 Dividends to common stockholders 1
0000230557-25-000010 6 19 EQ 0 H Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent us-gaap/2024 Other comprehensive income (loss) 0
0000230557-25-000010 6 20 EQ 0 H Treasury Stock Value Acquired Cost Method us-gaap/2024 Acquisition of treasury stock - share repurchase authorization 1
0000230557-25-000010 6 21 EQ 0 H Adjustments Related To Tax Withholding For Share Based Compensation us-gaap/2024 Acquisition of treasury stock - shares acquired related to employee share-based compensation plans 1
0000230557-25-000010 6 22 EQ 0 H Stockholders Equity us-gaap/2024 End of period 0
0000230557-25-000010 6 23 EQ 0 H Preferred Stock Dividends Per Share Declared us-gaap/2024 Dividends declared per preferred share (in dollars per share) 0
0000230557-25-000010 6 24 EQ 0 H Common Stock Dividends Per Share Declared us-gaap/2024 Dividends declared per common share (in dollars per share) 0
0000230557-25-000010 6 26 EQ 0 H Preferred Stock Shares Outstanding us-gaap/2024 Preferred stock, shares outstanding, beginning balance (in shares) 0
0000230557-25-000010 6 27 EQ 0 H Stock Issued During Period Shares New Issues us-gaap/2024 Issuance of preferred stock (in shares) 0
0000230557-25-000010 6 28 EQ 0 H Preferred Stock Shares Outstanding us-gaap/2024 Preferred stock, shares outstanding, ending balance (in shares) 0
0000230557-25-000010 6 30 EQ 0 H Common Stock Shares Outstanding us-gaap/2024 Common stock, shares outstanding, beginning of period (in shares) 0
0000230557-25-000010 6 31 EQ 0 H Stock Issued During Period Shares Dividend Reinvestment Plan us-gaap/2024 Dividend reinvestment plan (in shares) 0
0000230557-25-000010 6 32 EQ 0 H Stock Issued During Period Shares Share Based Compensation us-gaap/2024 Stock purchase and compensation plan (in shares) 0
0000230557-25-000010 6 33 EQ 0 H Treasury Stock Shares Acquired us-gaap/2024 Acquisition of treasury stock - share repurchase authorization (in shares) 1
0000230557-25-000010 6 34 EQ 0 H Shares Paid For Tax Withholding For Share Based Compensation us-gaap/2024 Acquisition of treasury stock - shares acquired related to employee share-based compensation plans (in shares) 1
0000230557-25-000010 6 35 EQ 0 H Common Stock Shares Outstanding us-gaap/2024 Common stock, shares outstanding, end of period (in shares) 0
0000230557-25-000010 7 2 CF 0 H Net Income Loss us-gaap/2024 Net income (loss) 0
0000230557-25-000010 7 4 CF 0 H Depreciation Amortization And Accretion Net us-gaap/2024 Depreciation and amortization 0
0000230557-25-000010 7 5 CF 0 H Share Based Compensation us-gaap/2024 Stock-based compensation expense 0
0000230557-25-000010 7 6 CF 0 H Income Loss From Equity Method Investments Net Of Dividends Or Distributions us-gaap/2024 Undistributed gains of equity method investments 1
0000230557-25-000010 7 7 CF 0 H Proceeds From Equity Investments In Excess Of Current Year Earnings 0000230557-25-000010 Distributions in excess of current year income of equity method investments 0
0000230557-25-000010 7 8 CF 0 H Gain Loss On Investments us-gaap/2024 Net realized and unrealized (gains) losses 1
0000230557-25-000010 7 9 CF 0 H Gain Loss On Sale Of Property Plant Equipment us-gaap/2024 Loss (gain) on disposal of fixed assets 1
0000230557-25-000010 7 11 CF 0 H Increase Decrease In Reserves For Losses And Loss Expenses Net Of Reinsurance Recoverables 0000230557-25-000010 Increase in reserve for loss and loss expense, net of reinsurance recoverable 0
0000230557-25-000010 7 12 CF 0 H Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance 0000230557-25-000010 Increase in unearned premiums, net of prepaid reinsurance 0
0000230557-25-000010 7 13 CF 0 H Increase Decrease In Income Taxes us-gaap/2024 Decrease in net federal income taxes 0
0000230557-25-000010 7 14 CF 0 H Increase Decrease In Premiums Receivable us-gaap/2024 Increase in premiums receivable 1
0000230557-25-000010 7 15 CF 0 H Increase Decrease In Deferred Policy Acquisition Costs us-gaap/2024 Increase in deferred policy acquisition costs 1
0000230557-25-000010 7 16 CF 0 H Increase Decrease In Interest And Dividends Receivable us-gaap/2024 Increase in accrued investment income 1
0000230557-25-000010 7 17 CF 0 H Increase Decrease In Employee Related Liabilities us-gaap/2024 Increase (decrease) in accrued salaries and benefits 0
0000230557-25-000010 7 18 CF 0 H Increase Decrease In Other Operating Assets us-gaap/2024 Increase in other assets 1
0000230557-25-000010 7 19 CF 0 H Increase Decrease In Other Operating Liabilities us-gaap/2024 Increase (decrease) in other liabilities 0
0000230557-25-000010 7 20 CF 0 H Net Cash Provided By Used In Operating Activities us-gaap/2024 Net cash provided by (used in) operating activities 0
0000230557-25-000010 7 22 CF 0 H Payments To Acquire Held To Maturity Securities us-gaap/2024 Purchases of fixed income securities, held-to-maturity 1
0000230557-25-000010 7 23 CF 0 H Payments To Acquire Available For Sale Securities Debt us-gaap/2024 Purchases of fixed income securities, available-for-sale 1
0000230557-25-000010 7 24 CF 0 H Payments To Acquire Mortgage Notes Receivable us-gaap/2024 Purchases of commercial mortgage loans 1
0000230557-25-000010 7 25 CF 0 H Payments To Acquire Equity Securities Fv Ni us-gaap/2024 Purchases of equity securities 1
0000230557-25-000010 7 26 CF 0 H Payments To Acquire Other Investments us-gaap/2024 Purchases of alternative investments and other investments 1
0000230557-25-000010 7 27 CF 0 H Payments To Acquire Short Term Investments us-gaap/2024 Purchases of short-term investments 1
0000230557-25-000010 7 28 CF 0 H Proceeds From Sale Of Available For Sale Securities Debt us-gaap/2024 Sales of fixed income securities, available-for-sale 0
0000230557-25-000010 7 29 CF 0 H Proceeds From Sale And Collection Of Mortgage Notes Receivable us-gaap/2024 Proceeds from commercial mortgage loans 0
0000230557-25-000010 7 30 CF 0 H Proceeds From Sale Of Short Term Investments us-gaap/2024 Sales of short-term investments 0
0000230557-25-000010 7 31 CF 0 H Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities us-gaap/2024 Redemption and maturities of fixed income securities, held-to-maturity 0
0000230557-25-000010 7 32 CF 0 H Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities us-gaap/2024 Redemption and maturities of fixed income securities, available-for-sale 0
0000230557-25-000010 7 33 CF 0 H Proceeds From Sale Of Equity Securities Fv Ni us-gaap/2024 Sales of equity securities 0
0000230557-25-000010 7 34 CF 0 H Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital us-gaap/2024 Distributions from alternative investments and other investments 0
0000230557-25-000010 7 35 CF 0 H Payments To Acquire Property Plant And Equipment us-gaap/2024 Purchases of property and equipment 1
0000230557-25-000010 7 36 CF 0 H Net Cash Provided By Used In Investing Activities us-gaap/2024 Net cash provided by (used in) investing activities 0
0000230557-25-000010 7 38 CF 0 H Payments Of Dividends Preferred Stock And Preference Stock us-gaap/2024 Dividends to preferred stockholders 1
0000230557-25-000010 7 39 CF 0 H Payments Of Dividends Common Stock us-gaap/2024 Dividends to common stockholders 1
0000230557-25-000010 7 40 CF 0 H Payments For Repurchase Of Common Stock us-gaap/2024 Acquisition of treasury stock 1
0000230557-25-000010 7 41 CF 0 H Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options us-gaap/2024 Net proceeds from stock purchase and compensation plans 0
0000230557-25-000010 7 42 CF 0 H Proceeds From Debt Net Of Issuance Costs us-gaap/2024 Proceeds from borrowings (net of debt issuance costs of $4.0 million) 0
0000230557-25-000010 7 43 CF 0 H Finance Lease Principal Payments us-gaap/2024 Repayments of finance lease obligations 1
0000230557-25-000010 7 44 CF 0 H Net Cash Provided By Used In Financing Activities us-gaap/2024 Net cash provided by (used in) financing activities 0
0000230557-25-000010 7 45 CF 0 H Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect us-gaap/2024 Net increase (decrease) in cash and restricted cash 0
0000230557-25-000010 7 46 CF 0 H Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents us-gaap/2024 Cash and restricted cash, beginning of period 0
0000230557-25-000010 7 47 CF 0 H Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents us-gaap/2024 Cash and restricted cash, end of period 0
0000230557-25-000010 8 1 CF 1 H Payments Of Debt Issuance Costs us-gaap/2024 Debt issuance costs paid 0

Description
Field Name Field Description
adsh Accession Number. The 20-character string formed from the 18-digit number assigned by the SEC to each EDGAR submission.
report Represents the report grouping. This field corresponds to the statement (stmt) field, which indicates the type of statement. The numeric value refers to the “R file” as posted on the EDGAR Web site.
line Represents the tag’s presentation line order for a given report. Together with the statement and report field, presentation location, order and grouping can be derived.
stmt The financial statement location to which the value of the “report” field pertains.
inpth Value was presented “parenthetically” instead of in columns within the financial statements. For example: Receivables (net of allowance for bad debts of $200 in 2012) $700.
rfile The type of interactive data file rendered on the EDGAR web site, H = .htm file, X = .xml file.
tag The tag chosen by the filer for this line item.
version The taxonomy identifier if the tag is a standard tag, otherwise adsh.
plabel The text presented on the line item, also known as a “preferred” label.
negating Flag to indicate whether the plabel is negating.