Net change in unrealized appreciation (depreciation) Unrealized Gain (Loss) on Investments SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Debt and Equity Securities, FV-NI Debt and Equity Securities, FV-NI [Line Items] Total Loss and Loss Adjustment Expense Recoverability Total Loss and Loss Adjustment Expense Recoverability [Member] Total Loss and Loss Adjustment Expense Recoverability Net realized gain Realized Investment Gains (Losses) Schedule of Other Investments Investment Holdings, Other than Securities [Table Text Block] Resinsurers [Axis] Resinsurers [Axis] Resinsurers Prior years Prior years Prior year favorable (adverse) loss development Prior Year Claims and Claims Adjustment Expense Award Timing Predetermined Award Timing Predetermined [Flag] Related Party Transaction [Axis] Related Party Transaction [Axis] Service RSUs Service RSUs [Member] Service RSUs Entity File Number Entity File Number Additional paid-in capital Additional Paid-in Capital [Member] Income from investment in related party investment fund (see Note 3) Income from investments in related party investment fund Share of Solasglas' net income (see Note 3) Income (loss) from investment in Solasglas Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Unearned premium reserves Unearned Premiums Funds held by cedants Premiums Receivable, Funds Withheld By Cedant Premiums Receivable, Funds Withheld By Cedant Recently Issued Accounting Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Investment management fee rate - monthly (in percent) Related Party Transaction, Monthly Management Fee Percentage The monthly rate charged by investment advisor calculated as a percentage of assets under management Change in net unearned premium reserves (Increase) Decrease in Unearned Premiums, Net Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in dollars per share) Earnings Per Share, Basic Corporate and other expenses Corporate and other expenses Other Expenses Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Schedule of Letters of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Liabilities Liabilities, Fair Value Disclosure [Abstract] Shares available for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Stock, Class of Stock [Table] Stock, Class of Stock [Table] Solasglas Investments, LP (SILP) Solasglas Investments, LP (SILP) [Member] Solasglas Investment LP (SILP) [Member] Schedule of Gross Premiums Written by Line of Business Schedule of Segment Reporting Information, by Segment [Table Text Block] Management fees Equity Method Investment, Summarized Financial Information, Management Fee Expense Equity Method Investment, Summarized Financial Information, Management Fee Expense Adjustment to Compensation, Amount Adjustment to Compensation Amount Affiliated Entity Affiliated Entity [Member] Schedule of Assets Measured at Fair Value on a Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Underwriting income (loss) Underwriting Income (Loss) Consolidation Consolidation, Policy [Policy Text Block] Share-based compensation expense Stock compensation expense Share-Based Payment Arrangement, Noncash Expense Schedule of Ceded Credit Risk Ceded Credit Risk [Table Text Block] Anti-dilutive stock options outstanding Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Net realized and unrealized gains (losses) on other investments (see Note 5) Unrealized Gain (Loss) on Investments and Derivatives Unrealized Gain (Loss) on Investments and Derivatives Common stock held (in shares) Related Party Transaction, Investment Owned, Shares Related Party Transaction, Investment Owned, Shares Service Agreement Service Agreement [Member] Service Agreement [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Contributions to investment in Solasglas Payments to Acquire Equity Method Investments Beginning balance Ending balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Ordinary share capital, authorized (in shares) Common Stock, Shares Authorized Total liabilities and equity Liabilities and Equity Fair Value, Recurring Fair Value, Recurring [Member] Deferred acquisition costs Deferred Policy Acquisition Cost Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Liabilities and equity Liabilities and Equity [Abstract] Reinsurance balances receivable, net Premiums Receivable, Net Cover [Abstract] Cover [Abstract] Maximum Maximum [Member] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Purchases of other investments Payments to Acquire Other Investments 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 Activity for Unvested Restricted Share Awards and Employee Restricted Stock Units Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Total fair value of restricted shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Proceeds from sales of fixed maturity investments Proceeds from Sale, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] U.S. government and agencies U.S. government and government agencies US Government Agencies Debt Securities [Member] Unearned premium reserves Increase (Decrease) in Unearned Premiums Investment management fee rate - annual (in percent) Related Party Transaction, Annual Management Fee Percentage The annual rate charged by investment advisor calculated as a percentage of assets under management Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Liabilities Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Cash securing debt facility Cash Securing Debt Facility [Member] Cash Securing Debt Facility Entity Shell Company Entity Shell Company Net investment income Net investment income Investment Income The net income earned from investments in securities and other investments including derivatives. It includes dividends from shares in corporations, and interest from bonds, loans, mortgages, derivatives, commercial paper, bank accounts, certificates of deposits, treasuries, and other financial securities. It also includes realized and unrealized gains and losses on all investments. Borrowings from debt facility Proceeds from Issuance of Debt Less: deferred financing costs Deferred Finance Costs Deferred Finance Costs Attritional losses Liability for Unpaid Claims and Claims Adjustment Expense, Attritional Losses Liability for Unpaid Claims and Claims Adjustment Expense, Attritional Losses Loss and loss adjustment expense reserves Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Citibank Citibank [Member] Citibank Operating Segments Operating Segments [Member] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Name Measure Name Letter of Credit Letter of Credit [Member] Proceeds from redemptions and maturities of fixed maturity investments Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Management fee Management Fee Expense Class of Stock [Line Items] Class of Stock [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Gross premiums written Gross premiums written Assumed Premiums Written Award Timing Method Award Timing Method [Text Block] CIBC CIBC [Member] CIBC Award Type [Axis] Award Type [Axis] Debt Total debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Deferred acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Total assets Total allocated assets Assets Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol 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 Entity Address, City or Town Entity Address, City or Town Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Change in unrealized gains Debt Securities, Trading, Unrealized Gain (Loss) Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Concentration Risk Type [Axis] Concentration Risk Type [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Private equity securities Private Equity Funds [Member] Reinsurance Concentration Risk Reinsurance Concentration Risk [Member] Reinsurance Concentration Risk Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Not rated Not rated [Member] Not rated Assets Assets, Fair Value Disclosure [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Other investments Other Investments Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Realized and change in unrealized gains (losses) Equity Method Investment, Summarized Financial Information, Gain (Loss) On Investment [Abstract] Equity Method Investment, Summarized Financial Information, Gain (Loss) On Investment Profit commission receivable Profit Commissions Receivable, Gross, Percent Profit Commissions Receivable, Gross, Percent Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unearned premiums ceded Prepaid Reinsurance Premiums Level 2 Fair Value, Inputs, Level 2 [Member] Restricted cash and cash equivalents Total restricted cash and cash equivalents Restricted Cash and Cash Equivalent Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Ordinary share capital, outstanding (in shares) Balance – beginning of period (in shares) Balance – end of period (in shares) Common Stock, Shares, Outstanding Non-agency RMBS Non-Agency Residential Mortgage-Backed Securities [Member] Non-Agency Residential Mortgage-Backed Securities Net of Collateral Reinsurance Recoverables, Net Of Collateral Reinsurance Recoverables, Net Of Collateral Less than 6 months Measurement Period One [Member] Measurement Period One PEO PEO [Member] Fixed maturity investments, at fair value Total fixed maturity investments, at fair value Total fixed maturity securities Debt Securities, Trading Interest income Investment Income, Interest GRIL GRIL [Member] GRIL Total before provision Reinsurance Recoverables, Gross Net change in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Resinsurers [Domain] Resinsurers [Domain] Resinsurers [Domain] Foreign exchange and translation adjustment Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss) Interest and dividend income, net of withholding taxes and other expenses Investment Income, Interest and Dividend Net of Withholding Taxes Investment Income, Interest and Dividend Net of Withholding Taxes Service RSs Service Restricted Stock [Member] Service Restricted Stock Retained earnings Retained Earnings [Member] Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Number of non-vested restricted  shares Number of non-vested RSUs Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash, cash equivalents and restricted cash at beginning of the period Cash, cash equivalents and restricted cash at end of the period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative contracts, at fair value Derivative Asset Income tax expense Income Tax Expense (Benefit) EPS: Earnings Per Share Attributable To Common Stockholders [Abstract] Earnings Per Share Attributable To Common Stockholders Other assets Other Assets Fair values measured on a nonrecurring basis Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Preferred share capital, issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Incurred losses related to: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Net investment income (loss) Net Investment Income Performance RSs Performance Restricted Stock [Member] Performance Restricted Stock Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Gross realized losses Equity Securities, FV-NI, Realized Loss Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Purchases of other assets Payments to Acquire Other Productive Assets Due from brokers Due from Correspondent Brokers Premiums receivable Premiums Receivable, Reinsurance Premiums Receivable, Reinsurance Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Greenlight Re Greenlight Re [Member] Greenlight Re All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] A- or better by A.M. Best A- or better by A.M. Best [Member] A- or better by A.M. Best Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Reinsurance balances payable Reinsurance Payable Proceeds from lines of credit Proceeds from Long-Term Lines of Credit Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Downward adjustments and impairments Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment And Impairments, Annual Amount Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment And Impairments, Annual Amount Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accrued interest Interest Receivable Forfeiture of restricted shares (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Related Party Transactions [Abstract] Related Party Transactions [Abstract] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Preferred share capital, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Fair value / carrying value Equity Securities, FV-NI Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Other liabilities Accrued expenses and other liabilities Other Liabilities Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year PEO Total Compensation Amount PEO Total Compensation Amount Net gain on investment transactions Gain (Loss) on Investments Contract termination prior notice period (in days) Related Party Transactions, Contract Termination Prior Notice Period Related Party Transactions, Contract Termination Prior Notice Period Equity Components [Axis] Equity Components [Axis] Cash securing trust accounts Trust Accounts [Member] Trust accounts pledged to clients for statutory purposes as collateral under reinsurance agreements. Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Capital withdrawals payable Capital Withdrawals Payable Capital Withdrawals Payable Supplementary information: Supplemental Cash Flow Information [Abstract] Net loss and loss adjustment expenses incurred Net loss and LAE incurred Total net loss and LAE incurred Policyholder Benefits and Claims Incurred, Net Entity Address, Country Entity Address, Country Other Performance Measure, Amount Other Performance Measure, Amount Schedule of Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Total Investment income Interest and Dividend Income, Operating Interest and dividends payable Interest and Dividends Payable Related Party [Domain] Related and Nonrelated Parties [Domain] Individual: Individual [Axis] Investments Investments [Abstract] Downward carrying value changes and impairment Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount Entity [Domain] Entity [Domain] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Investment in related party investment fund, at fair value Investments, at fair value Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Interest paid in cash Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Schedule of Effects of Reinsurance Effects of Reinsurance [Table Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Lender Name [Axis] Lender Name [Axis] Ceded Credit Risk [Table] Ceded Credit Risk [Table] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Gross realized gains Equity Securities, FV-NI, Realized Gain Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Equity [Abstract] Case reserves Liability for Unpaid Claims and Claims Adjustment Expense, Reported Claims, Amount Upward carrying value changes Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount SEGMENT REPORTING Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Deposit interest expense Interest Expense, Deposits Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Ownership [Domain] Ownership [Domain] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Investment income from Lloyd's syndicates Investment Income (Loss) From Third-Party Syndicates Investment Income (Loss) From Third-Party Syndicates Repurchase of ordinary shares Stock Repurchased During Period, Value Cost Debt Securities, Trading, Amortized Cost Entity Central Index Key Entity Central Index Key Ceded Credit Risk Ceded Credit Risk [Line Items] PEO Name PEO Name Total revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Agency residential mortgage-backed securities ("RMBS") Agency RMBS Residential Mortgage-Backed Securities [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Service RSUs Service Restricted Stock Units [Member] Service Restricted Stock Units Total incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Funds withheld Funds Held under Reinsurance Agreements, Liability Cash securing letters of credit issued Cash Collateral, Letters of Credit Issued [Member] Cash Collateral, Letters of Credit Issued Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Fair Value of Fixed Maturity Investments Trading and Equity Investments Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] OTHER INVESTMENTS Financial Instruments Disclosure [Text Block] Net premiums written Net premiums written Premiums Written, Net Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Research and operating Research And Operating Expense Research And Operating Expense Entity Filer Category Entity Filer Category Dividend income (net of withholding taxes) Dividend Income, Operating Local Phone Number Local Phone Number Provision for expected credit losses Reinsurance Receivable, Allowance for Credit Loss, Percent Reinsurance Receivable, Allowance for Credit Loss, Percent Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Deposit interest expense, net Interest Income (Expense), Deposits, Net Interest Income (Expense), Deposits, Net Subsequent Event Type [Axis] Subsequent Event Type [Axis] Private debt securities Private Convertible Debt Securities [Member] Private Convertible Debt Securities SHARE-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Assets Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Entity Address, Address Line Three Entity Address, Address Line Three 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 FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Credit Facility [Domain] Credit Facility [Domain] Change in unrealized gains Debt and Equity Securities, Unrealized Gain (Loss) Shareholders' equity Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total expenses Total expenses Benefits, Losses and Expenses Cliff vesting percentage after date of issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Amount Premiums Receivable, Net [Abstract] Investment, Name [Axis] Investment, Name [Axis] Investments sold short, at fair value Financial Instruments Sold, Not yet Purchased, at Fair Value Investments [Domain] Investments [Domain] Reinsurance recoverable on unpaid loss and loss adjustment expenses Add: Losses recoverable (see Note 8) Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Ownership [Axis] Ownership [Axis] Proceeds from sale of other investments Proceeds from Sale and Maturity of Other Investments Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Total fixed maturity securities Debt Securities, Trading, Restricted Net Investment Income [Abstract] Fair Value as of Grant Date Award Grant Date Fair Value Cost Equity Securities, FV-NI, Cost Entity Registrant Name Entity Registrant Name LCs issued Line of Credit Facility Amounts Drawn Line of Credit Facility Amounts Drawn Collateral Assets Investment Management Agreement Collateral Assets Investement Management Agreement [Member] Collateral Assets Investement Management Agreement [Member] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Municipal bonds Municipal Bonds [Member] Schedule of Breakdown of Net Investment Income Schedule of Other Nonoperating Income (Expense) [Table Text Block] Interest expense Interest Interest expense Interest Expense, Other Effect of dilutive employee and director share-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Carrying value Equity Securities without Readily Determinable Fair Value, Amount Large event losses Large Event Losses Large Event Losses Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Schedule of Debt Schedule of Debt [Table Text Block] Investment Type [Axis] Investment Type [Axis] 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 Fair value / carrying value Other Securities, Investments Other Securities, Investments Related Party [Axis] Related and Nonrelated Parties [Axis] Total investments Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Underwriting expenses Other underwriting expenses Other Underwriting Expense Restatement Determination Date: Restatement Determination Date [Axis] Reinsurance balances receivable Premiums and Other Receivables, Net Issued (forfeited) shares, net Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Unrealized gains Debt Securities, Trading, Unrealized Gain Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Net realized and unrealized losses (gains) on investments Change In Unrealized Gains Losses On Investments And Derivatives Change In Unrealized Gains Losses On Investments And Derivatives Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Liquidity funds Liquidity Fund, Fair Value Liquidity Fund, Fair Value Funds at Lloyd’s Premiums Receivable, Reinsurance, Funds Withheld, Percent Premiums Receivable, Reinsurance, Funds Withheld, Percent Compensation Amount Outstanding Recovery Compensation Amount Schedule of Liability for Unpaid Claims and Claims Adjustment Expense Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] GLRE Limited Partners Greenlight Capital Re Limited Partners [Member] Greenlight Capital Re Limited Partners [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Beginning balance (in dollars per share) Ending balance (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 Denominator for EPS: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Total investment income Total Investment Income (Loss) The net income earned from investments in securities and other investments including derivatives. It includes dividends from shares in corporations, and interest from bonds, loans, mortgages, derivatives, commercial paper, bank accounts, certificates of deposits, treasuries, and other financial securities. It also includes realized and unrealized gains and losses on all investments. Also includes income from equity method investment and equity in income of related party investment fund. Revenues Revenues [Abstract] Share-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Reinsurance balances receivable, net Premiums Receivable, Net, Percent Premiums Receivable, Net, Percent Financial Instruments [Domain] Financial Instruments [Domain] Segments [Domain] Segments [Domain] FIXED MATURITY INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net Investment Income [Line Items] Net Investment Income [Line Items] Net realized and unrealized losses (gains) on derivatives Gain (Loss) on Derivative Instruments Held for Trading Purposes, Net Minimum Minimum [Member] Open Market Open Market [Member] Open Market Unearned premiums ceded Increase (Decrease) in Prepaid Reinsurance Premiums Company Selected Measure Name Company Selected Measure Name Reinsurance balances receivable Increase (Decrease) in Premiums Receivable Other Other Cash and Cash Equivalents [Member] Other Cash and Cash Equivalents DEBT AND CREDIT FACILITIES Debt Disclosure [Text Block] Preferred share capital (par value $0.10; none issued) Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount NET INVESTMENT INCOME NET INVESTMENT INCOME (LOSS) DISCLOSURE [Text Block] NET INVESTMENT INCOME (LOSS) DISCLOSURE Issued (forfeited) shares, net Shares Issued, Value, Share-Based Payment Arrangement, Forfeited Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net income - diluted Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Current year Current Year Claims and Claims Adjustment Expense Acquisition costs Acquisition costs Deferred Policy Acquisition Costs, Amortization Expense Ordinary share capital (par value $0.10; issued and outstanding, xxx) (2025: par value $0.10; issued and outstanding, xxx) Common Stock, Value, Issued Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Table] Net premiums earned Premiums Earned, Net COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Diluted (in shares) Weighted average shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and Contingencies (Note 16) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Three Reinsurers Three Reinsurers [Member] Three Reinsurers Loss and loss adjustment expenses ceded Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure Entity Small Business Entity Small Business Innovations Innovations [Member] Innovations Premiums held by Lloyd's syndicates Premiums Receivable, Reinsurance, Funds Withheld By Third Party Syndicates, Percent Premiums Receivable, Reinsurance, Funds Withheld By Third Party Syndicates, Percent Restricted Cash and Cash Equivalent Item [Line Items] Restricted Cash and Cash Equivalent Item [Line Items] Document Transition Report Document Transition Report Accretion of debt offering costs, net of change in interest accruals Accretion of Debt Offering Costs and Change in Interest Accruals Accretion of Debt Offering Costs and Change in Interest Accruals Equity method investment, ownership interest (as a percent) Equity Method Investment, Ownership Percentage Numerator for EPS: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] IBNR Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Premiums held by Lloyd's syndicates Premiums Receivable, Reinsurance, Funds Withheld By Third Party Syndicates Premiums Receivable, Reinsurance, Funds Withheld By Third Party Syndicates Document Period End Date Document Period End Date Measurement Period [Axis] Measurement Period [Axis] Measurement Period PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Four Reinsurers Four Reinsurers [Member] Four Reinsurers Income before income tax Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax Net investment income Net Investment Income (Loss) Net Investment Income (Loss) Total shareholders' equity Equity, Including Portion Attributable to Noncontrolling Interest Average price (in dollars per share) Shares Acquired, Average Cost Per Share Liability for Claims and Claims Adjustment Expense Liability for Claims and Claims Adjustment Expense [Line Items] Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Equity method investments, fair value Equity Method Investments, Fair Value Disclosure EARNINGS PER SHARE Earnings Per Share [Text Block] LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Performance RSUs Performance Restricted Stock Units [Member] Performance Restricted Stock Units Funds withheld Increase (Decrease) in Funds Held under Reinsurance Agreements Profit commission receivable Profit Commissions Receivable, Gross Profit Commissions Receivable, Gross Performance and Service Restricted Stock Performance and Service Restricted Stock [Member] Performance and Service Restricted Stock All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Investment Income [Table] Investment Income [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Cost Other Investments, Cost Other Investments, Cost Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Premiums receivable Premiums Receivable, Reinsurance, Percent Premiums Receivable, Reinsurance, Percent Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income - basic Net Income (Loss) Available to Common Stockholders, Basic Financial Standby Letter of Credit Financial Standby Letter of Credit [Member] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Other items, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Revolving credit facility Long-Term Line of Credit Level 1 Fair Value, Inputs, Level 1 [Member] Foreign exchange gains (losses) Foreign exchange gains (losses) Gain (Loss), Foreign Currency Transaction, before Tax Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Diluted (in dollars per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Unrealized gains Other Investments, Unrealized Gain Other Investments, Unrealized Gain Credit Rating Source [Domain] Credit Rating, AM Best [Domain] Total before provision Premiums Receivable, Gross, Percent Premiums Receivable, Gross, Percent Earnings per share ("EPS"): Earnings Per Share [Abstract] Paid losses related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Proceeds from redemptions of investment in Solasglas Proceeds from Equity Method Investment, Distribution, Return of Capital Investments, Debt and Equity Securities [Abstract] Reinsurance Contract [Axis] Reinsurance Contract [Axis] INVESTMENT IN RELATED PARTY INVESTMENT FUND Equity Method Investments and Joint Ventures Disclosure [Text Block] Unrealized losses Equity Securities, FV-NI, Unrealized Loss Retrocession Portfolio Retrocession Portfolio [Member] Retrocession Portfolio Gross ceded premiums Gross Ceded Premiums Gross Ceded Premiums Less: Losses recoverable Total reinsurance recoverable, net Reinsurance Recoverables, Including Reinsurance Premium Paid Expenses Equity Method Investments, Summarized Financial Information, Expenses [Abstract] Equity Method Investments, Summarized Financial Information, Expenses Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Income tax paid (refund received) in cash Income Taxes Paid, Net Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Corporate bonds Corporate bonds Corporate Bond Securities [Member] Award Timing Disclosures [Line Items] Loss from catastrophes CAT event losses Loss from Catastrophes Schedule of Net Realized and Unrealized Gains (Losses) on Investments Schedule of Gain (Loss) on Securities Gain (Loss) on Securities [Table Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Net balance at January 1 Net balance at March 31 Liability for Unpaid Claims and Claims Adjustment Expense, Net Credit Rating Source [Axis] Credit Rating, AM Best [Axis] SHARE CAPITAL Equity [Text Block] RETROCESSION Reinsurance [Text Block] Net income Net income Net increase in Partners' capital Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Expiration Date Trading Arrangement Expiration Date Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Investor relations monthly fee Related Party Transaction, Amounts of Transaction 6 to 12 months Measurement Period Two [Member] Measurement Period Two Cliff vesting period after date of issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Schedule of Financial Information of Investment Equity Method Investments [Table Text Block] Segment Reporting Information Segment Reporting Information [Line Items] Preferred share capital, authorized (in shares) Preferred Stock, Shares Authorized Repurchase of ordinary shares Repurchase of ordinary shares Payments for repurchase Payments for Repurchase of Common Stock Gross premiums ceded Ceded Premiums Written Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Dividends Dividend Expense Dividend Expense Total before provision Premiums Receivable, Gross Entity Current Reporting Status Entity Current Reporting Status Investment Advisory Agreement Investment Advisory Agreement [Member] Investment Advisory Agreement [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Retained earnings Retained Earnings (Accumulated Deficit) Citibank FAL Citibank FAL [Member] Citibank FAL Financial Instrument [Axis] Financial Instrument [Axis] Expenses Benefits, Losses and Expenses [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Purchases of fixed maturity investments Payment for Acquisition, Trading Security, Held-for-Investment Ownership percentage Related Party Transaction, Investment Owned, Percentage Related Party Transaction, Investment Owned, Percentage Repayment of debt Repayments of Debt Current Fiscal Year End Date Current Fiscal Year End Date Subsequent Event Type [Domain] Subsequent Event Type [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Reinsurance balances payable Increase (Decrease) in Reinsurance Payables Weighted  average grant date fair value 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] Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Statement [Table] Statement [Table] Derivative contracts, at fair value Derivative Liability Adjustments to reconcile net income or loss to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Board of Directors Chairman Board of Directors Chairman [Member] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Investment income Equity Method Investment, Summarized Financial Information, Investment Income [Abstract] Equity Method Investment, Summarized Financial Information, Investment Income ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Cash and Cash Equivalents [Abstract] Anti-dilutive stock options outstanding (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Private equity securities Private Investments and Unlisted Equity Securities [Member] Private Investments and Unlisted Equity Securities Weighted average number of ordinary shares used in the determination of EPS: Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Loss and loss adjustment expense reserves Total Gross balance at January 1 Gross balance at March 31 Liability for Claims and Claims Adjustment Expense Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Partners' capital Net Assets Schedule of Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Basic (in shares) Weighted average shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Interest and dividends receivable Dividend and Interest Receivable Related Party Transaction [Domain] Related Party Transaction [Domain] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Performance and Service Restricted Stock Units Performance and Service Restricted Stock Units [Member] Performance and Service Restricted Stock Units Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Performance allocation Incentive Fee Adjustment Incentive Fee Adjustment Measurement Period [Domain] Measurement Period [Domain] Measurement Period [Domain] Unrealized gains Equity Securities, FV-NI, Unrealized Gain Net realized gains (losses) Debt Securities, Trading, Realized Gain (Loss) Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Unrealized losses Debt Securities, Trading, Unrealized Loss Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Total Total Expense Total Expense Ordinary share capital, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Schedule of Net Income (Loss) and Weighted Average Number of Shares Schedule of Weighted Average Number of Shares [Table Text Block] Funds at Lloyd’s Premiums Receivable, Reinsurance, Funds Withheld Premiums Receivable, Reinsurance, Funds Withheld Ordinary share capital, issued (in shares) Common Stock, Shares, Issued Funds held by cedants Premiums Receivable, Funds Withheld By Cedant, Percent Premiums Receivable, Funds Withheld By Cedant, Percent RESTRICTED CASH AND CASH EQUIVALENTS Cash and Cash Equivalents Disclosure [Text Block] % Premiums Receivable, Net, Percent [Abstract] Premiums Receivable, Net, Percent Loss and loss adjustment expenses ceded Policyholder Benefits and Claims Incurred, Assumed and Ceded Net realized gains (losses) Equity Securities, FV-NI, Realized Gain (Loss) Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Upward carrying value changes Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Schedule of Carrying Values of Private Investments and Unlisted Equity Securities Carried under Measurement Alternative Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] SUBSEQUENT EVENTS Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Provision for credit losses Provision for expected credit losses Reinsurance Recoverable, Allowance for Credit Loss Schedule of Reinsurance Balances Receivable Schedule Of Reinsurance Balance Receivable, Net [Table Text Block] Schedule Of Reinsurance Balance Receivable, Net Reinsurance recoverable on unpaid loss and loss adjustment expenses Increase (Decrease) in Reinsurance Recoverable Insurance Loss Reserves [Abstract] Insurance Loss Reserves [Abstract] Green Bricks Partners Inc (GRBK) Green Bricks Partners, Inc. (GRBK) [Member] Green Bricks Partners, Inc. (GRBK) Over 1 year Measurement Period Three [Member] Measurement Period Three Total liabilities Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Capacity Line of Credit Facility, Maximum Borrowing Capacity Earned ceded premiums Ceded Premiums Earned Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Unrealized losses Other Investments, Unrealized Loss Other Investments, Unrealized Loss Repurchase of shares (in shares) Repurchase of ordinary shares (in shares) Stock Repurchased During Period, Shares Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Reinsurance Disclosures [Abstract] Reinsurance Disclosures [Abstract] Net realized and unrealized gains (losses) for fixed maturity investments Net realized and unrealized gains (losses) on fixed maturities (see Note 4) Debt Securities, Trading, Gain (Loss) Statement [Line Items] Statement [Line Items] Liability for Unpaid Claims and Claims Adjustment Expense Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Asset-back securities ("ABS") ABS Asset-Backed Securities [Member] Consolidation Items [Axis] Consolidation Items [Axis] HSBC HSBC [Member] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] Subsequent Event [Line Items] Subsequent Event [Line Items] SILP General Partner SILP General Partner [Member] SILP General Partner Issue of shares for vested RSUs (in shares) Stock Issued During Period, Shares, Period Increase (Decrease) Ordinary share capital Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation