0000001 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Changes in Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)ls) link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Basis of Reporting and Accounting link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Loss and Loss Adjustment Expense Reserves link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Other Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Litigation link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Dividends link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Reporting and Accounting (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Basis of Reporting and Accounting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Loss and Loss Adjustment Expense Reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Other Comprehensive Income (Loss) (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Dividends (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Basis of Reporting and Accounting - Reporting and Accounting Policies - Allowance for Credit Loss (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Basis of Reporting and Accounting Non-Cash Activities (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Basis of Reporting and Accounting - Additional Details (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Basis of Reporting and Accounting Cash Activities (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Investments - Investment Portfolio by Major Security Type (Detail) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Investments - Hybrid Securities (Detail) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Investments - Composition of Fixed Maturities by Maturity (Detail) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Investments - Gross Unrealized losses by Major Security (Detail) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Investments - Components of Net Realized Gains (Losses) (Detail) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Investments - Components of Equity Realized Gains (Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Investments - Components of Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Investments - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value - Composition of Investment Portfolio by Major Security Type (Detail) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Fair Value - Summary of Changes in Fair Value Associated with Level 3 Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Fair Value - Summary of Quantitative Information about Level 3 Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Fair Value - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Debt - Summary of Debt (Detail) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Debt - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Loss and Loss Adjustment Expense Reserves Activity in Loss and Loss Adjustment Expense Reserves (Detail) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Loss and Loss Adjustment Expense Reserves (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Segment Information - Operating Results (Detail) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Segment Information - Underwriting Margins and Combined Ratios for our Underwriting Operations (Detail) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Segment Information - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) Including Reclassification Adjustments by Income Statement (Detail) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) Including Reclassification Adjustments by Income Statement, Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Litigation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Dividends (Details) link:presentationLink link:calculationLink link:definitionLink