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Disclosure - Investments Contractual Maturities of Available-for-Sale Fixed Maturity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Investments Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Investments Realized Gains (Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Investments Unrealized Gains (Losses) on Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Investments Investment Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Investments (Details), Real Estate link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Fair Value Measurements - Fair Value Hierarchy (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Fair Value Measures and Disclosures Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - 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Disclosure - Stock-based Compensation Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Earnings Per Share Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Reserves for Unpaid Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Reserves for Unpaid Losses and Loss Adjustment Expenses Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - 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