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Statement - Consolidated Statements of Cash Flows (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Discontinued Operations link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Deferred Policy Acquisition Costs link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Property and Equipment, Net link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Reserve for Losses and Loss Adjustment Expenses link:presentationLink link:calculationLink link:definitionLink 9952166 - 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Disclosure - SCHEDULE III - Supplementary Insurance Information link:presentationLink link:calculationLink link:definitionLink 9952186 - Disclosure - SCHEDULE IV - Reinsurance link:presentationLink link:calculationLink link:definitionLink 9952187 - Disclosure - SCHEDULE V - Valuation and Qualifying Accounts link:presentationLink link:calculationLink link:definitionLink 9952188 - Disclosure - SCHEDULE VI - Supplementary Information Concerning Property Casualty Insurance Operations link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Discontinued Operations (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - 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Disclosure - Discontinued Operations - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Discontinued Operations - JRG Re's Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Discontinued Operations - Operating Results of JRG Re Reported in Discontinued Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Discontinued Operations - Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Investments - Schedule of Available-for-Sale Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Investments - Schedule of Contract Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Investments - Schedule of Gross Unrealized Losses and Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Investments - Summary of Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Investments - Summary of Realized Gains and Losses on Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Investments - Summary of Private Debt and Equity Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Deferred Policy Acquisition Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Goodwill and Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Goodwill and Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Goodwill and Intangible Assets - Schedule of Future Estimated Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Goodwill and Intangible Assets - Summary of Changes in Net Carrying Value of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Property and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Leases - Summary of Operating Lease Liabilities Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Leases - Summary of Operating Lease Liabilities Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - 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 9955553 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Retroactive Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Incurred Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Cumulative Paid Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Reserves for Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Average Annual Percentage Payouts of Incurred Claims (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - IBNR Liabilities and Claims Frequency (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Reinsurance - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Reinsurance - Summary of Premiums Written, Premiums Earned, and Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Senior Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Junior Subordinated Debt - Summary of Junior Subordinated Debt and Trust Preferred Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Junior Subordinated Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Series A Preferred Shares (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Shareholders' Equity - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Shareholders' Equity - Schedule of Rollforward of Changes in Common Shares Issued and Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Shareholders' Equity - Summary of Cash Dividends Declared (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Equity Awards - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Equity Awards - Schedule of Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Equity Awards - Summary of RSU Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Equity Awards - Summary of Share Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Equity Awards - Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Income Taxes - Summary of Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Income Taxes - Summary of Net Deferred Tax Asset (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Other Operating Expenses and Other Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Employee Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Commitments and Contingent Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - 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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 9955587 - Disclosure - Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955588 - Disclosure - Fair Value Measurements - Summary of the Carrying Value and Fair Values of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955589 - Disclosure - Statutory Matters - Schedule of Statutory Accounting (Details) link:presentationLink link:calculationLink link:definitionLink 9955590 - Disclosure - Dividend Restrictions (Details) link:presentationLink link:calculationLink link:definitionLink 9955591 - Disclosure - Other Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955592 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink 9955593 - 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Disclosure - SCHEDULE V - Valuation and Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 9955600 - Disclosure - SCHEDULE VI - Supplementary Information Concerning Property Casualty Insurance Operations (Details) link:presentationLink link:calculationLink link:definitionLink