0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Statements of Operations (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Balance Sheets (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Changes in Temporary Equity and Stockholders' Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Description of Business link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Markel Fronting Arrangement link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Supplemental Balance Sheet and Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Segment Reporting and Disaggregated Revenue link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Notes Receivable link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Other Assets link:presentationLink link:calculationLink link:definitionLink 9952166 - 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Disclosure - Stockholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Related-Party Transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Description of Business (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Summary of Significant Accounting Policies - Schedule of Reconciliation of Revenue from Segments to Consolidated (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Markel Fronting Arrangement - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Markel Fronting Arrangement - Schedule of Changes in the Deposit Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Supplemental Balance Sheet and Cash Flow Information - Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Supplemental Balance Sheet and Cash Flow Information - Schedule of Restricted Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Supplemental Balance Sheet and Cash Flow Information - Schedule of Assets and Liabilities of Consolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Supplemental Balance Sheet and Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Segment Reporting and Disaggregated Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Segment Reporting and Disaggregated Revenue - Schedule of Segment Information, by Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Segment Reporting and Disaggregated Revenue - Schedule of Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Segment Reporting and Disaggregated Revenue - Schedule of Company's Revenue by Distribution Channel (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Investments - Schedule of Investments, Available-for-Sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Investments - Schedule of Security Holdings in an Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Investments - Schedule of Contractual Maturities of the Company's Available-for-Sale Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Investments - Schedule of Net Investment Income Component (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Investments - Schedule of Net Realized and Unrealized Gains (Losses) on Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Notes Receivable - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Notes Receivable - Schedule of Financing Receivable Credit Quality Indicators (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Leases - Schedule of Operating Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Leases - Schedule of Supplemental Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Leases - Schedule of Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Leases - Schedule of Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Intangible Assets - Schedule of Cost and Accumulated Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Intangible Assets - Schedule of Cost and Accumulated Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Intangible Assets - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Intangible Assets - Schedule of Future Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Reserves for Unpaid Losses and Loss Adjustment Expenses - Schedule of Unpaid Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Reserves for Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Reinsurance - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Reinsurance - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Reinsurance - Schedule of Earned Premium (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Reinsurance - Schedule of Reinsurance on Losses and Loss Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Debt - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Convertible Preferred Stock - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Convertible Preferred Stock - Change of Control, Fundamental Transaction and Optional Term Redemption (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Stockholders' Equity - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Stockholders' Equity - Schedule of Other Ownership Interests (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Share-Based Compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Share-Based Compensation - Schedule of Share-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Share-Based Compensation - Schedule of Restricted Stock Unit Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Share-Based Compensation - Schedule of Restricted Stock Units Award Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Share-Based Compensation - Schedule of Performance Stock Units Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Share-Based Compensation - Schedule of Performance-based Units Award Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Share-Based Compensation - Schedule of Grant-date Fair Value of Performance Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Earnings Per Share - Schedule of the Weighted Average Excluded from Diluted Earnings (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Taxation (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Related-Party Transactions - Schedule of Equity Interests in Hagerty (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Related-Party Transactions - Schedule of Reinsurance Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - Related-Party Transactions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink