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Entity Address, Postal Zip Code Entity Address, Postal Zip Code Short-term investments and other, gross realized losses Short Term Investments And Other Gross Realized Losses Represents the gross loss realized on the sale of short term investment and other. Schedule of Reconciliation of Beginning and Ending Reserve Balances for Losses and Loss Adjustment Expenses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Net realized and unrealized gains (losses) on investments Total Gain (Loss) on Investments Schedule of Gross Carrying Amounts for Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Preferred stock, dividend rate, percentage Preferred Stock, Dividend Rate, Percentage Dividends on common shares Payments of Ordinary Dividends, Common Stock Line of credit (up to) Line of Credit Facility, Maximum Borrowing Capacity Investments Investment [Text Block] Additional paid-in capital Additional Paid in Capital Reserve for losses and loss adjustment expenses gross of reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period Liability for Claims and Claims Adjustment Expense After five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Financial Instruments [Domain] Financial Instruments [Domain] Specialty Admitted Insurance Specialty Admitted Insurance [Member] Represents information regarding specialty admitted insurance. Statistical Measurement [Domain] Statistical Measurement [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Rate of interest Investment Interest Rate Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Vesting of RSUs (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Dividends on Series A preferred shares Dividends, Preferred Stock Dividends payable Dividends Payable Series A convertible preferred shares, outstanding (in shares) Temporary Equity, Shares Outstanding Net income Net income Net income Net Income (Loss) Attributable to Parent Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Number of securities excluded from the calculations of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount After one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Fixed maturity securities Debt Securities [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Ceded premiums payable Ceded Premiums Payable Temporary Equity [Line Items] Temporary Equity [Line Items] Reclassification adjustment for investment (losses) gains realized in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Unrealized losses Bank Loan Participations, Unrealized Losses, Credit Related Impairments Bank Loan Participations, Unrealized Losses, Credit Related Impairments Net investment income Net investment income Net Investment Income Equity Component [Domain] Equity Component [Domain] Cumulative amounts ceded under loss portfolio transfer Cumulative Amounts Ceded Under Loss Portfolio Transfer Cumulative Amounts Ceded Under Loss Portfolio Transfer Subsequent Event Type [Domain] Subsequent Event Type [Domain] Scenario [Axis] Scenario [Axis] Net income per common share: Earnings Per Share Reconciliation [Abstract] Preferred stock, dividend term Preferred Stock, Dividend Term Preferred Stock, Dividend Term Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Investment, Name [Domain] Investment, Name [Domain] State and municipal US States and Political Subdivisions Debt Securities [Member] Plan Name [Axis] Plan Name [Axis] Preferred stock, discount rate, percentage Preferred Stock, Discount Rate, Percentage Preferred Stock, Discount Rate, Percentage Non-employee directors Non-employee Directors [Member] Non-employee Directors [Member] Preferred stock, dividend payment rate, variable spread Preferred Stock, Dividend Payment Rate, Variable Spread Preferred Stock, Dividend Payment Rate, Variable Spread Fixed maturity securities, available-for-sale, at fair value (amortized cost: 2023 – $2,049,221; 2022 – $1,969,783) Fixed maturity securities, available-for-sale Total investments available-for-sale, Fair Value Total fixed maturity securities, available-for-sale Debt Securities, Available-for-Sale Indemnity Trust And Loss Fund Trust Indemnity Trust And Loss Fund Trust [Member] Indemnity Trust And Loss Fund Trust Identifiable intangible assets subject to amortization Finite-Lived Intangible Assets, Net [Abstract] Supplemental information Supplemental Cash Flow Information [Abstract] Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Required collateral, percentage Required Collateral, Percentage Required Collateral, Percentage Plan Name [Domain] Plan Name [Domain] Lapsed (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Lapsed in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Lapsed in Period Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Senior debt Senior debt Long-Term Line of Credit Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Quoted Prices in Active Markets for Identical Assets Level 1 Fair Value, Inputs, Level 1 [Member] Other Operating Expenses [Abstract] Other Operating Expenses and Other Expenses [Abstract] Other Operating Expenses and Other Expenses [Abstract] BBB- or better Standard & Poor's, BBB- or Better Rating [Member] Standard & Poor's, BBB- or Better Rating [Member] Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Prepaid reinsurance premiums Prepaid Reinsurance Premiums Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Weighted-average remaining contractual life of options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Award Type [Axis] Award Type [Axis] Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Gross fee income Fee Income Represents amount of fee income . Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic [Abstract] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Bank loan participations, at fair value Bank loan participations Fair Value, Option, Loans Held as Assets, Aggregate Fair Value Fair Value, Option, Loans Held as Assets, Aggregate Fair Value Schedule of Gross Unrealized Losses and Fair Value for Available-for-Sale Securities Debt Securities, Available-for-Sale [Table Text Block] Fortitude Reinsurance Fortitude Reinsurance [Member] Fortitude Reinsurance Other liabilities Other Liabilities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Other invested assets: Other Investments [Abstract] Purchases Payment To Acquire Bank Loan Participations Represents payment to acquire Bank loan participations. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Short-term investments Short-term investments Other Short-Term Investments Legal Entity [Axis] Legal Entity [Axis] Available-for-sale fixed maturity securities and equity securities Securities (Assets) [Member] Total liabilities Liabilities Preferred stock, convertible, conversion price Preferred Stock, Convertible, Conversion Price Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Geographical [Axis] Geographical [Axis] Percentage of outstanding shares Business Acquisition, Percentage of Voting Interests Acquired Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Reserve for losses and loss adjustment expenses Liability for Claims and Claims Adjustment Expense, Property-Casualty Liability Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Investment in variable interest entities Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Document Type Document Type Weighted- Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Fixed maturity securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Acquired Intangible Assets [Line Items] Acquired Intangible Assets [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Return of capital Proceeds from Equity Method Investment, Distribution, Return of Capital Unvested, beginning of period (in dollars per share) Unvested, end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Segments [Axis] Segments [Axis] Senior Debt Debt Disclosure [Text Block] Assets deposited for securing letters of credit Assets Deposited For Securing Letters Of Credit Represents amount of assets deposited for securing letters of credit. Operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company Invested assets: Investments [Abstract] Gain (Loss) on Securities [Line Items] Gain (Loss) on Securities [Line Items] Net Investment Income [Line Items] Net Investment Income [Line Items] Equity securities: Short-Term Investments [Abstract] Cash equivalent collateral returned to trust Cash Equivalent Collateral Returned to Trust Cash Equivalent Collateral Returned to Trust Financial Instrument [Axis] Financial Instrument [Axis] Total gains or losses (realized/unrealized)-Included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Letter of credit 102.5 Million 2013 Facility [Member] 2013 Facility Other invested assets Carrying Value Other Investments Subsequent Event Subsequent Event [Member] Document Period End Date Document Period End Date Dividends on Series A preferred shares Less: Dividends on Series A preferred shares Temporary Equity, Dividends, Adjustment Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Underwriting profit Underwriting Profit (Loss) Represents the amount related to underwriting profit (loss) during the period. Allowance for credit losses on reinsurance recoverables Reinsurance Recoverables on Unpaid Losses, Allowance Convertible Preferred Stock Convertible Preferred Stock [Member] Residential mortgage-backed Residential Mortgage Backed Fair Value Represents fair value of residential mortgage backed. Total assets Segment assets Assets Total loss and loss adjustment expense payments Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Debt Disclosure [Abstract] Debt Disclosure [Abstract] Net income per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Bank holding companies Bank Holding Companies [Member] Name of the investment category. Tax on net unrealized gains (losses) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Unrealized gains (losses) arising during the period, before U.S. income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Total equity securities Equity securities Equity Securities, FV-NI, Current Antidilutive Securities [Axis] Antidilutive Securities [Axis] Unsecured Debt Unsecured Debt [Member] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Aleka Aleka [Member] Aleka Accounting Policies [Abstract] Accounting Policies [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Gross written premiums Premiums Written, Gross Series A redeemable preferred shares – 2023 and 2022: $0.00125 par value; 20,000,000 shares authorized; 150,000 shares issued and outstanding Temporary Equity, Carrying Amount, Attributable to Parent Income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Schedule Of Acquired Intangible Assets [Table] Schedule Of Acquired Intangible Assets [Table] Represents the tabular information related to intangible assets acquired in the acquisition. Segments [Domain] Segments [Domain] Dividends on Series A preferred shares Dividends on Series A preferred shares Payments of Ordinary Dividends, Preferred Stock and Preference Stock Earnings Per Share Earnings Per Share [Text Block] After one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Reinsurance recoverable on unpaid losses, net Deduct: Loss reserves ceded in Casualty Re LPT Reinsurance Recoverable for Unpaid Claims and Claims Adjustments U.S. income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Award Type [Domain] Award Type [Domain] Various LLCs Various LLCs [Member] Various LLCs Residential mortgage-backed Residential Mortgage-Backed Securities [Member] Weighted-average period of unrecognized share based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Fixed maturity securities, gross unrealized losses Gross unrealized losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Weighted-average remaining contractual life of options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Number of credit facilities Number of Credit Facilities Number of Credit Facilities Schedule of Gross Carrying Amounts and Accumulated Amortization for Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Carrying Value and Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Registrant Name Entity Registrant Name Raiser Raiser [Member] Raiser [Member] Series A convertible preferred shares, authorized (in shares) Temporary Equity, Shares Authorized Subsequent Events Subsequent Events [Text Block] Short-term investments and other Short Term Investments And Other Gross Realized Gains (Losses) Short Term Investments And Other Gross Realized Gains (Losses) Premiums receivable and agents’ balances, net Premiums and Other Receivables, Net Entity Address, City or Town Entity Address, City or Town Subsegments [Axis] Subsegments [Axis] Expenses Operating Expenses [Abstract] Vesting of RSUs Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Asset Class [Domain] Asset Class [Domain] Minimum Minimum [Member] One year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Other income and expenses Other Income And Expenses Represents other income and expenses. Contingent Liabilities [Line Items] Contingent Liabilities [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Deferred policy acquisition costs Deferred Policy Acquisition Cost Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Investment, Name [Axis] Investment, Name [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Trading Symbol Trading Symbol Entity File Number Entity File Number Net gain (loss) in bank loan participations Bank loan participations Bank Loan Participations, Net Gain (Loss) Bank Loan Participations, realized and unrealized net gains (losses) Investment Income [Table] Investment Income [Table] Title of Individual [Axis] Title of Individual [Axis] External Credit Rating, Standard & Poor's [Domain] External Credit Rating, Standard & Poor's [Domain] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period RSUs RSUs Restricted Stock Units (RSUs) [Member] Effective U.S. federal income tax expense (benefit) rate Effective Income Tax Rate Reconciliation, Percent Other Operating Expenses and Other Expenses Other Operating Income and Expense [Text Block] LPT Trust And Loss Fund Trust LPT Trust And Loss Fund Trust [Member] LPT Trust And Loss Fund Trust Estimates and Assumptions Use of Estimates, Policy [Policy Text Block] Junior subordinated debt Junior subordinated debt Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Commercial Auto Business Commercial Auto Business [Member] Commercial Auto Business Restricted stock unit dividend equivalents Restricted Stock Unit Dividend Equivalents Represents amount of dividend equivalent of RSU's. Subsequent Events [Abstract] Subsequent Events [Abstract] Total revenues Segment revenues Revenues Excess And Surplus Lines and Casualty Reinsurance Excess And Surplus Lines And Casualty Reinsurance [Member] Excess And Surplus Lines And Casualty Reinsurance Schedule of Other Operating Expenses Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Associated Trust Agreement [Domain] Associated Trust Agreement [Domain] Associated Trust Agreement [Domain] Investment Income Investment Income, Net Summary of Net Realized Gains and Losses on Investments Realized Gain (Loss) on Investments [Table Text Block] Stock options, restricted share units ("RSU's") and convertible preferred stock Stock Options, Restricted Stock Units And Convertible Preferred Stock [Member] Stock options and share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met. Schedule of Other Invested Assets Other Invested Asset [Table Text Block] Tabular disclosure of other invested assets consisting of private debt and equity investments. Credit Facility [Domain] Credit Facility [Domain] Prior years - retroactive reinsurance Losses and loss adjustment expenses - retroactive reinsurance Prior Year Claims and Claims Adjustment Expense, Retroactive Reinsurance Prior Year Claims and Claims Adjustment Expense, Retroactive Reinsurance Fixed maturity securities, 12 months or more, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Dividend payable, record date Dividends Payable, Date of Record Total Intangible Assets, Gross Intangible Assets, Gross (Excluding Goodwill) Amortization of intangible assets Amortization of intangible assets Amortization of Intangible Assets Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Basic (in dollars per share) Earnings Per Share, Basic Number of insurance companies Number Of Insurance Companies This element represents number of insurance companies owned by the entity. Common stock, covenant, threshold, cash paid (in dollars per share) Common Stock, Dividend Per Share, Cash Payments, Threshold Common Stock, Dividend Per Share, Cash Payments, Threshold Percentage of then-applicable conversion price threshold Preferred Stock, Convertible, Mandatory Conversion, Percentage Preferred Stock, Convertible, Mandatory Conversion, Percentage Letters of credit facility, amount Letter Of Credit Facility Amount Represents amount of letter of credit facility. Payout for achievement, maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Payout For Achievement, Maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Payout For Achievement, Maximum Counterparty Name [Domain] Counterparty Name [Domain] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Total shareholders’ equity Balance Balance Stockholders' Equity Attributable to Parent Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value After five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Dividends on common shares Dividends, Common Stock Entity Interactive Data Current Entity Interactive Data Current Deduct: Change in deferred reinsurance gain - retroactive reinsurance Increase (Decrease) In Deferred Reinsurance Gain Increase (Decrease) In Deferred Reinsurance Gain Commercial mortgage and asset-backed Commercial Mortgage-Backed Securities [Member] Number of shares issued during period (in shares) Sale of Stock, Number of Shares Issued in Transaction Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Casualty Reinsurance Casualty Reinsurance [Member] Represents information regarding casualty reinsurance. Reinsurance recoverables Reinsurance Recoverables, Gross Number of notes issued Number Of Notes Issued Number Of Notes Issued Payout for achievement, target Share-Based Compensation Arrangement by Share-Based Payment Award, Payout For Achievement, Target Share-Based Compensation Arrangement by Share-Based Payment Award, Payout For Achievement, Target Sales – fixed maturity securities Proceeds from Sale of Debt Securities, Available-for-Sale Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Retained Deficit Retained Earnings [Member] Total Amount Dividends, Common Stock, Cash Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Common Shares Common stock Common Stock [Member] Limited partnerships Partnership Interest [Member] Schedule of Summary of Share Based Compensation Expense and Related Tax Benefit Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Net unrealized gains (losses), net of taxes of $5,001 in 2023 and $(11,649) in 2022 Other comprehensive (loss) income Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Number of reportable segments Number of Reportable Segments Common share repurchases Payments for Repurchase of Common Stock Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Class of Stock [Axis] Class of Stock [Axis] Schedule of Summary of RSU Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Income Tax Expense Income Tax, Policy [Policy Text Block] Statement [Table] Statement [Table] Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Document Quarterly Report Document Quarterly Report Series A convertible preferred shares, issued (in shares) Temporary Equity, Shares Issued Series A convertible preferred shares (in dollars per share) Temporary Equity, Par or Stated Value Per Share Statistical Measurement [Axis] Statistical Measurement [Axis] Equity securities, gross realized gain Equity Securities, FV-NI, Realized Gain Identifiable intangibles not subject to amortization Indefinite-Lived Intangible Assets (Excluding Goodwill) Retained deficit Retained Earnings (Accumulated Deficit) Convertible preferred stock, shares issued upon conversion Convertible Preferred Stock, Shares Issued upon Conversion Transfers in to Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 After ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 U.S. Treasury securities and obligations guaranteed by the U.S. government US Treasury and Government [Member] Equity Components [Axis] Equity Components [Axis] Scenario [Domain] Scenario [Domain] Trademarks Trademarks [Member] Recurring basis Fair Value, Recurring Fair Value, Recurring [Member] Exercisable, end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Rasier and Aleka Rasier And Aleka [Member] Rasier And Aleka U.S. income taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Fixed maturity securities, less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Document Fiscal Year Focus Document Fiscal Year Focus Outstanding commitments to invest Commitment to Investment In Limited Partnership Commitment to Investment In Limited Partnership Statement [Line Items] Statement [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Unvested, beginning of period (in shares) Unvested, end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Sales Proceeds From Bank Loan Participations Represents cash inflow from sales of bank loan participations. Contractual life (in years) Share Based Arrangement by Share Based Award Option Contractual Life Share Based Arrangement by Share Based Award Option Contractual Life Securities receivable or payable, net Payments for (Proceeds from) Unsettled Investments, Net Payments for (Proceeds from) Unsettled Investments, Net Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Total investments available-for-sale, Gross Unrealized Losses Aggregate net unrealized loss Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Series A Preferred Stock Series A Preferred Stock [Member] Change in net unearned premiums (Increase) Decrease in Unearned Premiums, Net Net realized investment (losses) gains Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Letter of Credit 30 Million Letter Of Credit 30 Million [Member] Letter Of Credit 30 Million Number of shares to be received per PRSU (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Contingent Right, Number Of Shares To Be Received Share-Based Compensation Arrangement by Share-Based Payment Award, Contingent Right, Number Of Shares To Be Received James River Group, Inc. James River Group Inc [Member] Represents information regarding James River Group, Inc. Document Transition Report Document Transition Report Local Phone Number Local Phone Number Schedule of Summary of Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Number of trading days Preferred Stock, Convertible, Number Of Trading Days Preferred Stock, Convertible, Number Of Trading Days Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Other operating expenses Total Other Cost and Expense, Operating Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Common stock, shares outstanding (in shares) Balance (in shares) Balance (in shares) Common Stock, Shares, Outstanding Goodwill Segment goodwill Goodwill Funds held Funds Held under Reinsurance Agreements, Liability Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Income tax expense Income Tax Expense (Benefit) Geographical [Domain] Geographical [Domain] Income Statement [Abstract] Income Statement [Abstract] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Additional Paid-in Capital Additional Paid-in Capital [Member] Insurance licenses and authorities Licensing Agreements [Member] Cash provided by (used in) operating activities excluding reduction in collateral funds Net Cash Provided by (Used in) Operating Activities Excluding Change in Collateral Funds Net Cash Provided by (Used in) Operating Activities Excluding Change in Collateral Funds Document Fiscal Period Focus Document Fiscal Period Focus Indemnity Trust Indemnity Trust [Member] Indemnity Trust Equity securities, gross realized losses Equity Securities, FV-NI, Realized Loss Proceeds from sales Proceeds from Sale of Equity Method Investments Maturities Proceeds From Maturities From Bank Loan Participations Represents cash inflow from maturities of bank loan participations. Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period Reinsurance Recoverables on Unpaid Losses, Gross Unpaid principal balance Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance Letter of credit 100 Million 2017 Facility 2017 Facility [Member] 2017 Facility Number of impaired securities Debt Securities, Available For Sale, Number Of Impaired Securities Debt Securities, Available For Sale, Number Of Impaired Securities Equity securities, at fair value (cost: 2023 – $115,854; 2022 – $117,169) Equity Securities, FV-NI Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Schedule of Summary of Available-for-Sale Investments Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] PRSU PRSU [Member] PRSU Total invested assets Investments Common shares – 2023 and 2022: $0.0002 par value; 200,000,000 shares authorized; 37,619,226 and 37,470,237 shares issued and outstanding, respectively Common Stock, Value, Issued Carrying Value Reported Value Measurement [Member] Reserve For Losses And Loss Adjustment Expenses [Line Items] Reserve For Losses And Loss Adjustment Expenses [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Preferred stock Preferred Stock [Member] Contingent Liabilities [Table] Contingent Liabilities [Table] Discloses information about contingent liabilities. Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Below BBB- Standard & Poor's, Below BBB- Rating [Member] Standard & Poor's, Below BBB- Rating [Member] Other income Other Income Private Placement Private Placement [Member] Cash, cash equivalents, and restricted cash equivalents at beginning of period Cash, cash equivalents, and restricted cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Underwriting profit (loss) of operating segments Total underwriting profit of operating segments Underwriting Profit Loss Of Operating Segments This element represents amount of underwriting Profit (loss) of operating segments. Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Net income available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Common stock, shares issued (in shares) Common Stock, Shares, Issued Other underwriting expenses of the operating segments Other Underwriting Expense Summary of Net Unrealized Gains and Losses on Investments Unrealized Gain (Loss) on Investments [Table Text Block] Number of issuers Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Accrued expenses Accrued Liabilities Fixed maturity securities, fair value Total fair value Debt Securities, Available-for-Sale, Unrealized Loss Position Amendment Flag Amendment Flag Life (Years) Finite-Lived Intangible Asset, Useful Life Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Temporary Equity, by Class of Stock [Table] Temporary Equity, by Class of Stock [Table] 2014 Director Plan Non Employee Director Incentive Plan 2014 [Member] Represents information regarding 2014 Non Employee Director Incentive Plan. Investment Type [Axis] Investment Type [Axis] Number of loss portfolio transfers Number Of Loss Portfolio Transfers Number Of Loss Portfolio Transfers Corporate and Other Corporate and Other [Member] Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Reserve for Losses and Loss Adjustment Expenses Liability For Claims And Claims Adjustment Expense [Text Block] The entire disclosure for the liability for claims and claims adjustment expense. Schedule of Summary of Company's Segment Results Schedule of Segment Reporting Information, by Segment [Table Text Block] Total investments available-for-sale, Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Entity Current Reporting Status Entity Current Reporting Status Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Exercisable, end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Deduct: Loss and loss adjustment expense payments net of reinsurance: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Liquidation preference (in dollars per share) Temporary Equity, Liquidation Preference Per Share Cash equivalent collateral trust arrangement Cash Equivalent Collateral Held In Trust Arrangement Cash Equivalent Collateral Held In Trust Arrangement Deferred reinsurance gain Deferred Reinsurance Gain Deferred Reinsurance Gain Cash dividend declared (in dollars per share) Dividends Payable, Amount Per Share Counterparty Name [Axis] Counterparty Name [Axis] Broker relationships Broker Relationships [Member] Represents information related to broker relationships. Beginning of period (in shares) End of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Loss Portfolio Transfer Loss Portfolio Transfer [Member] Loss Portfolio Transfer Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Dilutive potential common shares (in dollars per share) Earnings Per Share, Dilutive Potential Common Shares Earnings Per Share, Dilutive Potential Common Shares Accounting Policies [Table] Accounting Policies [Table] Accounting Policies Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Liabilities: Liabilities [Abstract] Associated Trust Agreement [Axis] Associated Trust Agreement [Axis] Associated Trust Agreement Options Share-Based Payment Arrangement, Option [Member] Schedule of Dividends Dividends Declared [Table Text Block] Title of Individual [Domain] Title of Individual [Domain] L PT Trust LPT Trust [Member] LPT Trust Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Retroactive reinsurance benefit recognized Retroactive Reinsurance Benefit Recognized Retroactive Reinsurance Benefit Recognized Per share price (in dollars per share) Sale of Stock, Price Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Temporary Equity [Abstract] Maximum Maximum [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Equity securities Net realized and unrealized gains (losses) on investments in equity securities Equity Securities, FV-NI, Gain (Loss) Cash dividend declared (in dollars per share) Preferred Stock, Convertible, Term Preferred Stock, Convertible, Term Business Acquisition [Line Items] Business Acquisition [Line Items] Reinsurance recoverable on paid losses Reinsurance Recoverable for Paid Claims and Claims Adjustments Entity Small Business Entity Small Business Measurement Basis [Axis] Measurement Basis [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Reinsurance, amount remaining Reinsurance, Aggregate Coverage Limit, Amount Remaining Reinsurance, Aggregate Coverage Limit, Amount Remaining Capital Stock and Equity Awards Stockholders' Equity Note Disclosure [Text Block] Dividend declared per common share (in dollars per share) Dividend declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Revenues Revenues [Abstract] Schedule of Assets Measured at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Purchases – fixed maturity securities Payments to Acquire Debt Securities, Available-for-Sale Net earned premiums Net earned premiums Premiums Earned, Net Development on prior year loss reserves Development On Prior Year Loss Reserves [Abstract] Unrecognized share based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Assets held in trust Assets Held-in-trust Third-party Reinsureds Third-party Reinsureds [Member] Third-party Reinsureds [Member] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] JRG Reinsurance Company Ltd JRG Reinsurance Company Ltd [Member] Represents reinsurance subsidiary of the entity. U.S. tax benefit on share based compensation expense Share-Based Payment Arrangement, Expense, Tax Benefit JRG Reinsurance Company, Ltd. Jrg Reinsurance Company Ltd [Member] Represents reinsurance subsidiary of the entity. Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Title of 12(b) Security Title of 12(b) Security Residential mortgage-backed Residential Mortgage Backed Amortized Cost Represents Amortized Cost of Residential mortgage-backed securities. Cash distributions from LLCs Proceeds from Equity Method Investment, Distribution Subsequent Event [Line Items] Subsequent Event [Line Items] Reinsurance, aggregate coverage limit Reinsurance, Aggregate Coverage Limit Reinsurance, Aggregate Coverage Limit Bank Loan Participations Loan Participations and Assignments [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Fixed maturity securities, less than 12 months, gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Restricted cash equivalents Restricted cash equivalents at beginning of period Restricted cash equivalents at end of period Restricted Cash Equivalents Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Segment Information Segment Reporting Disclosure [Text Block] Amortization of discount Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization of Discount Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization of Discount Entity Address, Country Entity Address, Country Fixed maturity securities, 12 months or more, gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Fair Value Estimate of Fair Value Measurement [Member] Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Subsegments [Domain] Subsegments [Domain] Fixed maturity securities, available-for-sale, at amortized cost Total fixed maturity securities, Cost or Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Current year Current Year Claims and Claims Adjustment Expense Sale of stock, consideration received on transaction Sale of Stock, Consideration Received on Transaction Other expenses Other Expenses Credit Rating, Standard & Poor's [Axis] Credit Rating, Standard & Poor's [Axis] Equity securities, at cost Equity Securities, FV-NI, Cost Commercial mortgage and asset-backed Commercial Mortgage And Asset Backed Amortized Cost Represents amortized cost of commercial mortgage and asset-backed. Schedule of Summary of Available-for-Sale Investments by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Number of underlying projects sold Number of Underlying Projects Sold Number of Underlying Projects Sold Entity Filer Category Entity Filer Category Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Payables to reinsurers Reinsurance Payable Bank loan participations, gross realized losses Bank Loan Participations, Gross Realized Loss Represents the gross realized losses on bank loan participations. Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] UNITED STATES UNITED STATES Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] Short-Duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] Development on prior year loss reserves Prior years - excluding retroactive reinsurance Prior Year Claims and Claims Adjustment Expense Ownership percentage Equity Method Investment, Ownership Percentage Losses and loss adjustment expenses Policyholder Benefits and Claims Incurred, Net, Property, Casualty and Liability Share based compensation expense Share-Based Payment Arrangement, Expense Commitments and contingent liabilities Commitments and Contingencies Security Exchange Name Security Exchange Name Beginning of period (in dollars per share) End of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Changes in fair values of short-term investments and other Short Term Investments And Other, Changes in Fair Value Short Term Investments And Other, Changes in Fair Value Amortization of policy acquisition costs Deferred Policy Acquisition Costs, Amortization Expense Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Excess and Surplus Lines Excess And Surplus Lines [Member] Represents information regarding excess and surplus lines segment. Changes in fair values of bank loan participations Bank Loan Participations, Changes in Fair Value Bank Loan Participations, Changes in Fair Value Amount of letters of credit issued Letters of Credit Outstanding, Amount Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Dividends payable, date to be paid Dividends Payable, Date to be Paid Percentage of available for sale securities Percentage Of Available For Sale Debt Securities Represents percentage of available for sale debt securities. Total gains or losses (realized/unrealized)-Included in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Loss Fund Trust Loss Fund Trust [Member] Loss Fund Trust Schedule of Reconciliation of Securities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Reinsurance premium Reinsurance Premium Reinsurance Premium Cover [Abstract] Cover [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Significant Unobservable Inputs Level 3 Fair Value, Inputs, Level 3 [Member] Less reclassification adjustment: OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax [Abstract] Payments for reinsurance Payments for Reinsurance Other assets Other Assets Segment Reporting [Abstract] Segment Reporting [Abstract] Add: Incurred losses and loss adjustment expenses net of reinsurance: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Net written premiums Premiums Written, Net Investments [Domain] Investments [Domain] Forecast Forecast [Member] Lapsed (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Lapsed in Period, Weighted Average Exercise Price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Lapsed in Period, Weighted Average Exercise Price Total liabilities, Series A redeemable preferred shares, and shareholders’ equity Liabilities and Equity Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Maturities, calls and paydowns Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Significant Other Observable Inputs Level 2 Fair Value, Inputs, Level 2 [Member] Commercial mortgage and asset-backed Commercial Mortgage And Asset Backed Fair Value Represents fair value of commercial mortgage and asset backed. Schedule of Underwriting Profit of Operating Segments by Individual Segment and Reconciliation to Consolidated Income Before Taxes Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Series A Preferred Shares Temporary Equity Disclosure [Text Block] Temporary Equity Disclosure Reinsurance Transaction [Axis] Reinsurance Transaction [Axis] Reinsurance Transaction Current Fiscal Year End Date Current Fiscal Year End Date Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Fixed maturity securities, gross realized gains Debt Securities, Available-for-Sale, Realized Gain Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Sale of Stock [Domain] Sale of Stock [Domain] Vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Accounting Policies [Line Items] Accounting Policies [Line Items] Accounting Policies Issuance costs Payments of Stock Issuance Costs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Compensation expense under share incentive plans APIC, Share-Based Payment Arrangement, Increase for Cost Recognition After ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Renewable energy LLCs Renewable Energy Llcs [Member] Name of the investment category. Number of trading days immediately preceding Mandatory Conversion Preferred Stock, Dividend, Trading Days Preferred Stock, Dividend, Trading Days Reserve for losses and loss adjustment expenses net of reinsurance recoverables at beginning of period Reserve for losses and loss adjustment expenses net of reinsurance recoverables at end of period Liability for Unpaid Claims and Claims Adjustment Expense, Net Equity securities Equity Securities [Member] Bank loan participations, gross realized gains Bank Loan Participations, Gross Realized Gain Represents the gross realized gains on bank loan participations. Corporate Corporate Debt Securities [Member] Changes in fair values of equity securities Equity Securities, FV-NI, Unrealized Gain (Loss) Issuance of Series A preferred shares Proceeds from Issuance of Preferred Stock and Preference Stock Entity Address, Address Line Three Entity Address, Address Line Three Short-term investments, net Payments for (Proceeds from) Short-Term Investments Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Total expenses Benefits, Losses and Expenses Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Class of Stock [Domain] Class of Stock [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Ceded written premiums Ceded Premiums Written Total incurred losses and loss and adjustment expenses Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Interest expense Interest expense Interest expense Interest Expense Common Stock, Covenant Threshold, Per Share Common Stock, Covenant Threshold, Per Share Common Stock, Covenant Threshold, Per Share Securities available-for-sale: Fixed maturity securities, available-for-sale: Debt Securities, Available-for-Sale [Abstract] Credit Facility [Axis] Credit Facility [Axis] Unrealized gains (losses) arising during the period, net of U.S. income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Subsequent Event [Table] Subsequent Event [Table] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Renewable energy notes receivable Renewable Energy Bridge Financing Notes [Member] Name of the investment category. Entity Tax Identification Number Entity Tax Identification Number Maximum number of shares available for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Other operating expenses of the Corporate and Other segment Other operating expenses of the Corporate and Other segment Other Operating Expenses Of Corporate And Other Segment Represents Other operating expenses of the Corporate and Other segment. Sales – equity securities Proceeds from Sale of Equity Securities, FV-NI Cost or Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Purchases – equity securities Payments to Acquire Equity Securities, FV-NI 2014 LTIP Long Term Incentive Plan 2014 [Member] Represents information regarding Long Term Incentive Plan 2014. Number of equity securities held Number Of Equity Securities Held Number Of Equity Securities Held Investment in LLC Investment In Llc [Member] Represents investment in LLC`s. Change in cash, cash equivalents, and restricted cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Accrued investment income Accrued Investment Income Receivable Dilutive potential common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Entity Central Index Key Entity Central Index Key Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Measurement Frequency [Axis] Measurement Frequency [Axis] Weighted- Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Components of Comprehensive (Income) Loss Comprehensive Income (Loss) [Table Text Block] Change in restricted cash equivalents Increase (Decrease) In Restricted Cash Equivalents Increase (Decrease) In Restricted Cash Equivalents Entity [Domain] Entity [Domain] City Area Code City Area Code Assets Assets [Abstract] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Crediting rate on funds withheld Crediting Rate On Funds Withheld Crediting Rate On Funds Withheld Payout for achievement, threshold Share-Based Compensation Arrangement by Share-Based Payment Award, Payout For Achievement, Threshold Share-Based Compensation Arrangement by Share-Based Payment Award, Payout For Achievement, Threshold Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Sale of Stock [Axis] Sale of Stock [Axis] Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table] Short-Duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table] Beginning balance Ending balance Asset value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Maturities and calls – fixed maturity securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Asset Class [Axis] Asset Class [Axis] Senior debt repayments Repayments of senior debt Repayments of Senior Debt Investment Income Income (Loss) from Equity Method Investments Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Reinsurance Transaction [Domain] Reinsurance Transaction [Domain] Reinsurance Transaction [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Investment in private subordinated notes Other invested assets – notes receivable Notes Receivable Represents carrying value of notes receivable as on reporting date. Schedule of Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fixed maturity securities, gross realized losses Debt Securities, Available-for-Sale, Realized Loss Unearned premiums Unearned Premiums