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Statement - Consolidated Statements of Cash Flows (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Deferred Policy Acquisition Costs link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Property and Equipment, Net link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Reserve for Losses and Loss Adjustment Expenses link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Reinsurance link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - Senior Debt link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - Junior Subordinated Debt link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - Series A Preferred Shares link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - Equity Awards link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - Other Operating Expenses and Other Expenses link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - Employee Benefits link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - Other Comprehensive (Loss) Income link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - Statutory Matters link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - Dividend Restrictions link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - Other Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - SCHEDULE I - Summary of Investments - Other than Investments in Related Parties link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - SCHEDULE II - Condensed Financial Information of Registrant link:presentationLink link:calculationLink link:definitionLink 0000036 - Disclosure - SCHEDULE III - Supplementary Insurance Information link:presentationLink link:calculationLink link:definitionLink 0000037 - Disclosure - SCHEDULE IV - Reinsurance link:presentationLink link:calculationLink link:definitionLink 0000038 - Disclosure - SCHEDULE V - Valuation and Qualifying Accounts link:presentationLink link:calculationLink link:definitionLink 0000039 - Disclosure - SCHEDULE VI - Supplementary Information Concerning Property Casualty Insurance Operations link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 0000043 - Disclosure - Deferred Policy Acquisition Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 0000044 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 0000045 - Disclosure - Property and Equipment, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 0000046 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 0000047 - Disclosure - Reserve for Losses and Loss Adjustment Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 0000048 - Disclosure - Reinsurance (Tables) link:presentationLink link:calculationLink link:definitionLink 0000049 - Disclosure - Junior Subordinated Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 0000050 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 0000051 - Disclosure - Equity Awards (Tables) link:presentationLink link:calculationLink link:definitionLink 0000052 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 0000053 - Disclosure - Other Operating Expenses and Other Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 0000054 - Disclosure - Other Comprehensive (Loss) Income (Tables) link:presentationLink link:calculationLink link:definitionLink 0000055 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 0000056 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 0000057 - Disclosure - Statutory Matters (Tables) link:presentationLink link:calculationLink link:definitionLink 0000058 - Disclosure - Accounting Policies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000059 - Disclosure - Accounting Policies - Schedule of Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 0000060 - Disclosure - Investments - Schedule of Available-for-Sale Investments (Details) link:presentationLink link:calculationLink link:definitionLink 0000061 - Disclosure - Investments - Schedule of Contract Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 0000062 - Disclosure - Investments - Schedule of Gross Unrealized Losses and Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 0000063 - Disclosure - Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000064 - Disclosure - Investments - Summary of Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 0000065 - Disclosure - Investments - Summary of Realized Gains and Losses on Investments (Details) link:presentationLink link:calculationLink link:definitionLink 0000066 - Disclosure - Investments - Summary of Private Debt and Equity Investments (Details) link:presentationLink link:calculationLink link:definitionLink 0000067 - Disclosure - Deferred Policy Acquisition Costs (Details) link:presentationLink link:calculationLink link:definitionLink 0000068 - Disclosure - Goodwill and Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000069 - Disclosure - Goodwill and Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000070 - Disclosure - Goodwill and Intangible Assets - Schedule of Future Estimated Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - Goodwill and Intangible Assets - Summary of Changes in Net Carrying Value of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000072 - Disclosure - Property and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 0000073 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000074 - Disclosure - Leases - Summary of Operating Lease Liabilities Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 0000074 - Disclosure - Leases - Summary of Operating Lease Liabilities Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 0000075 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000075 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000076 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Reserve for Losses and Loss Adjustment Expenses, Net of Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 0000077 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Incurred Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0000078 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Cumulative Paid Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0000079 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Reserves for Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0000080 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Average Annual Percentage Payouts of Incurred Claims (Details) link:presentationLink link:calculationLink link:definitionLink 0000081 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - IBNR Liabilities and Claims Frequency (Details) link:presentationLink link:calculationLink link:definitionLink 0000082 - Disclosure - Reinsurance - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000083 - Disclosure - Reinsurance - Summary of Premiums Written, Premiums Earned, and Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0000084 - Disclosure - Senior Debt (Details) link:presentationLink link:calculationLink link:definitionLink 0000085 - Disclosure - Junior Subordinated Debt - Summary of Junior Subordinated Debt and Trust Preferred Securities (Details) link:presentationLink link:calculationLink link:definitionLink 0000086 - Disclosure - Junior Subordinated Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000087 - Disclosure - Series A Preferred Shares (Details) link:presentationLink link:calculationLink link:definitionLink 0000088 - Disclosure - Shareholders' Equity - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000089 - Disclosure - Shareholders' Equity - Schedule of Rollforward of Changes in Common Shares Issued and Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 0000090 - Disclosure - Shareholders' Equity - Summary of Cash Dividends Declared (Details) link:presentationLink link:calculationLink link:definitionLink 0000091 - Disclosure - Equity Awards - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000092 - Disclosure - Equity Awards - Summary of Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000093 - Disclosure - Equity Awards - Summary of RSU Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000094 - Disclosure - Equity Awards - Summary of Share Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 0000095 - Disclosure - Equity Awards - Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 0000096 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000097 - Disclosure - Income Taxes - Summary of Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 0000098 - Disclosure - Income Taxes - Summary of Net Deferred Tax Asset (Details) link:presentationLink link:calculationLink link:definitionLink 0000099 - Disclosure - Other Operating Expenses and Other Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0000100 - Disclosure - Employee Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 0000101 - 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Disclosure - Fair Value Measurements - Summary of Assets Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 0000109 - Disclosure - Fair Value Measurements - Summary of Available-for-Sale Fixed Maturity Securities Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 0000110 - Disclosure - Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000111 - Disclosure - Fair Value Measurements - Summary of the Carrying Value and Fair Values of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 0000112 - Disclosure - Statutory Matters - Schedule of Statutory Accounting (Details) link:presentationLink link:calculationLink link:definitionLink 0000113 - Disclosure - Statutory Matters - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000114 - Disclosure - 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Statements of Cash Flows (Parent Company) (Details) link:presentationLink link:calculationLink link:definitionLink 0000121 - Disclosure - SCHEDULE II - Condensed Financial Information of Registrant - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000122 - Disclosure - SCHEDULE III - Supplementary Insurance Information (Details) link:presentationLink link:calculationLink link:definitionLink 0000123 - Disclosure - SCHEDULE IV - Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 0000124 - Disclosure - SCHEDULE V - Valuation and Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 0000125 - Disclosure - SCHEDULE VI - Supplementary Information Concerning Property Casualty Insurance Operations (Details) link:presentationLink link:calculationLink link:definitionLink