0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Nature of business, organization structure and basis of presentation link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Accounting changes link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Fair value link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Loss reserves link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Reinsurance link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Related party transactions link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Net income per common share link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Changes in accumulated other comprehensive income link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Stockholders' equity link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Accounting changes (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Fair value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Loss reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Reinsurance (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Related party transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Net income per common share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Changes in accumulated other comprehensive income (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Nature of business, organization structure and basis of presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Investments - Net Investment Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Investments - Net Investment Gains (Losses) (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Investments - Net Unrealized Gains and Losses on Available-for-Sale Securities as a Separate Component of OCI (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Investments - Change in Net Unrealized Gains (Losses) on Available-for-Sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Investments - Summary of Fixed Maturity Securities Classified as Available-for-Sale (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Investments - Schedule of Fixed Maturity Securities in a Continuous Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Investments - Summary of Contractual Maturities of Fixed Maturity Securities Available-For-Sale (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Fair value - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Fair value - Summary of Significant Inputs used for Fair Value Measurement of Fixed Maturity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair value - Schedule of Fair Value Assets Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Fair value - Schedule of Additional Information about Fair Value Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Fair value - Summary of Fair Value Assets Measured on Recurring Basis, Significant Unobservable Input (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Fair value - Schedule of Estimated Fair Value Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Loss reserves - Summary of Liability For Unpaid Claims And Claim Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Loss reserves - Activity for the Liability for Loss Reserves (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Loss reserves - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Reinsurance - Summary of Effects of Reinsurance on Premiums Written and Earned (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Reinsurance - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Reinsurance - Schedule of Retained Aggregate Loss and Initial and Current Reinsurance Coverage (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Reinsurance - Schedule of Retained Aggregate Loss and Initial and Current Reinsurance Coverage (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Reinsurance - Quota Share Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Reinsurance - Quota Share Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Borrowings - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Borrowings - Schedule of Long-term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Related party transactions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Related party transactions - Schedule of Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Net income per common share - Schedule of Basic and Diluted Net Income Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Changes in accumulated other comprehensive income - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Changes in accumulated other comprehensive income - Reclassification out of Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Stockholders' equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Stockholders' equity - Dividends Declared (Details) link:presentationLink link:calculationLink link:definitionLink