Accounting Policies [Abstract] SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Related Party Transactions [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Segment Reporting [Abstract] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Broker Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Gross Premiums Written Sales [Member] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] Largest broker Largest [Member] Largest (Member) 2nd largest broker Second Largest [Member] Second Largest [Member] 3rd largest broker Third Largest [Member] Third Largest [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Number of operating segments Number of Operating Segments Largest broker Revenues Concentration risk, percentage Concentration Risk, Percentage Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] U.S. and Caribbean North America [Member] Worldwide (1) Worldwide [Member] Worldwide Europe Europe [Member] Asia Asia [Member] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Gross premiums written Assumed Premiums Written Gross premiums by geographical area as a percentage of total gross premiums Gross premiums by geographical area as a percentage of total gross premiums Gross written premiums by geographical area as a percentage of total gross written premiums Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Insurance Product Line [Axis] Insurance Product Line [Axis] Insurance Product Line [Domain] Insurance Product Line [Domain] Total Property Property Insurance Product Line [Member] Aviation Aviation Property Insurance Product Line [Member] Aviation line of business for insurance operations. Commercial Property and Casualty, Commercial Insurance Product Line [Member] Energy Energy Property Insurance Product Line [Member] Energy liability line of business for insurance operations. Motor physical damage Motor Vehicle Physical Damage Product Line [Member] Motor physical damage line of business for insurance operations Personal Property and Casualty, Personal Insurance Product Line [Member] Total Casualty Liability and Casualty Insurance Product Line [Member] Total casualty line of business for insurance operations General liability (1) General Liability [Member] Marine liability Marine Casualty Insurance [Member] Marine Casualty Insurance [Member] Motor liability Motor Vehicle Liability Casualty Product Line [Member] Motor liability line of business for insurance operations Professional liability Professional Malpractice Liability Insurance [Member] Total Specialty Other Insurance Product Line [Member] Financial Financial Guarantee Insurance and Surety Product Line [Member] Specialized insurance coverage relating to financial risks such as surety (surety bonds) and trade credit. Health Health Insurance Product Line [Member] Workers’ compensation (1) Workers' Compensation Insurance Product Line [Member] Workers' compensation line of business of insurance coverage Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gross premiums by line of business as a percentage of total gross premiums Premiums Written, Gross as a percentage of Total Gross Premiums Written Gross written premiums by line of business as a percentage of total gross written premiums Financial Instruments [Abstract] Financial Instruments [Abstract] Trading Securities [Table] Trading Securities [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Equities – listed Common Stock [Member] Exchange traded funds Exchange Traded Funds [Member] Equities – listed Equity Securities [Member] Schedule of Trading Securities and Other Trading Assets [Line Items] Schedule of Trading Securities and Other Trading Assets [Line Items] Cost/ amortized cost Trading Securities, Cost Unrealized gains Trading Securities, Unrealized Holding Gain Unrealized losses Trading Securities, Unrealized Holding Loss Equity securities, trading, at fair value Trading Securities, Equity Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted Stock Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of non-vested shares, Balance at beginning Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Number of non-vested restricted shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of non-vested restricted shares, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Number of non-vested restricted shares, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of non-vested shares, Balance at end Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value, Balance at beginning Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Balance at end Trading, debt maturities, within one year, cost Trading Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Amount of trading debt securities at cost or amortized cost, maturing in the next rolling twelve months following the latest balance sheet presented. Trading, debt maturities, within one year, fair value Trading Securities, Debt Maturities, Next Twelve Months, Fair Value Amount of trading debt securities at fair value, maturing in the next rolling 12 months following the latest balance sheet presented. Trading, debt maturities, 1 to 5 years, Cost Trading Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Amount of trading debt securities at cost or amortized cost, maturing in the rolling 2 to 5 years following the latest balance sheet presented. Trading, debt maturities, 1 to 5 years, fair value Trading Securities, Debt Maturities, Year Two Through Five, Fair Value Amount of trading debt securities at fair value, maturing in the rolling 2 to 5 years following the latest balance sheet presented. Trading, debt maturities, 5 to 10 years, Cost Trading Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Amount of trading debt securities at cost or amortized cost, maturing in the rolling 6 to 10 years following the latest balance sheet presented. Trading, debt maturities, 5 to 10 years, fair value Trading Securities, Debt Maturities, Year Six Through Ten, Fair Value Amount of trading debt securities at fair value, maturing in the rolling 6 to 10 years following the latest balance sheet presented. Trading, debt maturities, after 10 years, Cost Trading Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Amount of trading debt securities at cost or amortized cost, maturing after rolling 10 years following the latest balance sheet presented. Trading, debt maturities, after 10 years, fair value Trading Securities, Debt Maturities, after Ten Years, Fair Value Amount of trading debt securities at fair value, maturing more than 10 years following the latest balance sheet presented. Cost/ amortized cost Debt instruments, trading, at fair value Trading Securities, Debt Reclassifications Reclassification, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash and Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Premium Revenue Recognition Insurance Premiums Revenue Recognition, Policy [Policy Text Block] Reinsurance Premiums Ceded Reinsurance Accounting Policy [Policy Text Block] Deferred Acquisition Costs Deferred Policy Acquisition Costs, Policy [Policy Text Block] Funds Withheld Funds Withheld [Policy Text Block] Accounting policy for funds held on behalf the reinsurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder, which represent a liability of the ceding insurer. Loss and Loss Adjustment Expense Reserves and Recoverable Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] Notes Receivable Loans and Leases Receivable, Nonaccrual Loan and Lease Status, Policy [Policy Text Block] Deposit Assets and Liabilities Deposit Contracts, Policy [Policy Text Block] Fixed Assets Property, Plant and Equipment, Policy [Policy Text Block] Financial Instruments Investment, Policy [Policy Text Block] Derivative Financial Instruments Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block] Share-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Foreign Exchange Foreign Currency Transactions and Translations Policy [Policy Text Block] Other Assets Other Assets [Policy Text Block] Description of immaterial items aggregated and included under the Other Assets line item on the balance sheet. Other Liabilities Other Liabilities [Policy Text Block] Description of items aggregated and included under Other Liabilities on the balance sheet. Non-controlling Interest Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Earnings (Loss) Per Share Earnings Per Share, Policy [Policy Text Block] Taxation Income Tax, Policy [Policy Text Block] Segment Information Segment Reporting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Income Tax Disclosure [Abstract] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Verdant Verdant Holding Company, Ltd [Member] Verdant Holding Company, Ltd [Member] GRIL Greenlight Reinsurance Ireland, DAC [Member] Greenlight Reinsurance Ireland, DAC Ireland IRELAND Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets Other Assets [Member] Income Taxes [Line Items] Income Taxes [Line Items] [Line Items] for Income Taxes [Table] Deferred tax (expense) benefit Deferred Income Tax Expense (Benefit) Current tax (expense) benefit Current Income Tax Expense (Benefit) Income tax (expense) benefit Income Tax Expense (Benefit) Tax rate for taxable income Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Tax rate for trading income Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Trading Income, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Trading Income, Percent Income Taxes Receivable Income Taxes Receivable Current taxes payable Accrued Income Taxes, Current Deferred tax asset Deferred Tax Assets, Net Valuation allowance Deferred Tax Assets, Valuation Allowance Operating Loss Carryforwards Operating Loss Carryforwards Operating Loss Carryforwards, Expiration Date Operating Loss Carryforwards, Expiration Date Tax refunds received Proceeds from Income Tax Refunds Federal Excise Tax rate Federal Excise Tax rate The tax rate on Federal Excise Taxes applicable to non-U.S. reinsurers on premiums written relating to risk located in the United States. Federal Excise Taxes Incurred Federal Excise Taxes Incurred The amount of federal excise taxes incurred on reinsurance premiums received by a non-U.S. reinsurer with respect to risks insured in the United States. Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Private and unlisted equity securities Private and unlisted equity securities [Member] Private equities and unlisted equity securities Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Fair Value of investments in private equity funds Alternative Investments, Fair Value Disclosure Percentage of funds that have redemption restrictions Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage Amount of unfunded commitments relating to private equity funds Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments Due to and from Broker-Dealers and Clearing Organizations [Abstract] Due to prime brokers [Table] Due to prime brokers [Table] Margin borrowing from prime brokers relating to investments purchased on margin as well as borrowings against investments for providing collateral for outstanding letters of credits. GLRE Greenlight Reinsurance, Ltd. [Member] Greenlight Reinsurance, Ltd. Greenlight Reinsurance Ireland, Ltd. [Member] Due to prime broker [Axis] Due to prime broker [Axis] Amounts due to prime brokers relating to letters of credit collateral borrowings and margin borrowings for investment purposes Due to Prime Broker [Domain] Due to Prime Broker [Domain] Due to Prime Broker [Domain] Collateral for LOCs issued Collateral for LOCs and trust accounts [Member] Margin borrowing from prime brokers against investments for purposes of collateral for LOCs issued and trust accounts pledged. Bank Overdrafts Investment Purchases [Member] Investment Purchases [Member] Due to Prime Broker [Line Items] Due to Prime Broker [Line Items] Due to Prime Broker [Line Items] Amounts due to prime brokers Other Payables to Broker-Dealers and Clearing Organizations Maximum temporary leverage Maximum temporary leverage Maximum percentage of assets that leverage is allowed on a temporary basis (30 days). Maximum long-term leverage Maximum long-term leverage The maximum percentage of invested assets for which leverage is allowed over the long-term Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document and Entity Information [Table] Document and Entity Information [Table] Document and Entity Information [Table] Common Class A Common Class B Common Class B [Member] Document and Entity Information [Line Items] Document and Entity Information [Line Items] [Line Items] for Document and Entity Information [Table] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float FINANCIAL INSTRUMENTS Fair Value, Investments in Debt and Marketable Equity Securities (and Certain Trading Assets), and Derivative Instruments Disclosure [Text Block] Fair Value, Investments in Debt and Marketable Equity Securities (and Certain Trading Assets), and Derivative Instruments Disclosure [Text Block] Reinsurance Disclosures [Abstract] Ceded Credit Risk [Table] Ceded Credit Risk [Table] Credit Rating Source [Axis] Credit Rating Source [Axis] Credit Rating Source [Domain] Credit Rating Source [Domain] AM Best, A- Rating [Member] AM Best, A- Rating [Member] Unrated [Member] Unrated [Member] No rating assigned by any external rating agencies. Premiums and Other Receivables, Net [Member] Premiums Receivable [Member] Ceded Credit Risk, Collateralization [Axis] Ceded Credit Risk, Collateralization [Axis] Ceded Credit Risk, Collateralization [Domain] Ceded Credit Risk, Collateralization [Domain] Ceded Credit Risk, Secured Ceded Credit Risk, Secured [Member] Ceded Credit Risk, Unsecured Ceded Credit Risk, Unsecured [Member] Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Loss and loss adjustment expenses incurred, net Policyholder Benefits and Claims Incurred, Net Loss and loss expenses recovered and recoverable Policyholder Benefits and Claims Incurred, Assumed and Ceded Loss and loss adjustment expenses recoverable Reinsurance Recoverables Funds withheld from unrated retrocessionaires Funds Held under Reinsurance Agreements, Liability Collateral Held in Trust Collateral Held in Trust Cash and securities posted as collateral by the retrocessionaire in a trust account for the benefit of the ceding reinsurer. Provision for uncollectible losses recoverable Reinsurance Recoverables, Allowance Debt instruments Debt Securities [Member] Fair Value Measurements, Recurring and Nonrecurring Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Trading Securities (and Certain Trading Assets) Trading Securities [Table Text Block] Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Investment Holdings, Other than Securities Investment Holdings, Other than Securities [Table Text Block] Investments Sold, Not yet Purchased Investments Sold, Not yet Purchased [Table Text Block] Fair Values of Financial Contracts Outstanding Schedule of Derivative Instruments [Table Text Block] Gains and losses on derivatives recognized in income Derivative Instruments, Gain (Loss) [Table Text Block] Derivatives volume of activities based on notional amounts Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Offsetting derivative assets and liabilities Offsetting Assets and Liabilities [Table Text Block] Disclosure of information about derivative and financial assets and liabilities that are subject to offsetting, including enforceable master netting arrangements Geographical [Domain] Tax rate for non-trading income Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Non-trading Income, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Non-trading Income, Percent Financial contracts receivable, Gross amounts of recognized assets (liabilities) Derivative Asset, Fair Value, Gross Asset Financial contracts receivable, Gross amounts offset in the balance sheet Derivative Asset, Fair Value, Gross Liability Financial contracts receivable, Net amounts of assets (liabilities) presented in the balance sheet Derivative Asset Financial contracts receivable, financial instruments available for offset Derivative, Collateral, Obligation to Return Securities Financial contracts receivable, Cash collateral (received) pledged Derivative, Collateral, Obligation to Return Cash Financial contracts receivable, Net amount of asset (liability) Derivative Asset, Fair Value, Amount Offset Against Collateral Financial contracts payable, Gross amounts of recognized assets (liabilities) Derivative Liability, Fair Value, Gross Liability Financial contracts payable, Gross amounts offset in the balance sheet Derivative Liability, Fair Value, Gross Asset Financial contracts payable, Net amounts of assets (liabilities) presented in the balance sheet Derivative Liability Financial contracts payable, financial instruments available for offset Derivative, Collateral, Right to Reclaim Securities Financial contracts payable, Cash collateral (received) pledged Derivative, Collateral, Right to Reclaim Cash Financial contracts payable, Net amount of asset (liability) Derivative Liability, Fair Value, Amount Offset Against Collateral Net Investment Income [Abstract] Realized gains (losses) Realized Gains Losses On Sale Of Investments And Derivatives The net realized gains (losses) on investments and derivatives sold during the period. Change in unrealized gains and losses Unrealized Gain (Loss) on Investments and Derivatives Unrealized Gain (Loss) on Investments and Derivatives Investment related foreign exchange gains (losses) Foreign Currency Transaction Gain (Loss), before Tax Interest and dividend income, net of withholding taxes Interest and Dividend Income, Securities, Operating, Trading or Measured at Fair Value Interest, dividend and other expenses Interest, Dividend, and Other Expense, Securities, Operating, Trading or Measured at Fair Value Interest, Dividend, and Other Expense, Securities, Operating, Trading or Measured at Fair Value Investment advisor compensation Investment Advisor Compensation Expense Investment Advisor Compensation Expense Net investment income (loss) 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. Net investment return (loss) (percentage) Investment Income, Investment Return Percentage The rate of return (loss) on investments for the period, net of all fees and expenses related to investments. Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Board of Directors Chairman Board of Directors Chairman [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Investment Advisory Agreement Investment Advisory Agreement [Member] Investment Advisory Agreement [Member] Service Agreement Service Agreement [Member] Service Agreement [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Performance compensation full rate Related Party Transaction, Performance Compensation Full Rate as a Percentage of Investment Income The full rate of performance compensation as a percent of investment income charged by a related party. Performance compensation reduced rate Related Party Transaction, Performance Compensation Reduced Rate as a Percentage of Investment Income The reduced rate charged by related party for performance compensation as a percent of investment income due to loss carry forward provision. Loss carry forward recoupment required Related Party Transaction, Loss Carry Forward Recoupment Required as a Percentage of Aggregate Investment Loss Earned The additional amount of investment income required after a period of investment loss, in order for the performance compensation rate to return from reduced rate to full rate. Performance compensation expense Incentive Fee Expense Investment management fee rate - monthly Related Party Transaction, Monthly Management Fee Percentage The monthly rate charged by investment advisor calculated as a percentage of assets under management Investment management fee rate - annual Related Party Transaction, Annual Management Fee Percentage The annual rate charged by investment advisor calculated as a percentage of assets under management Investment management fee expense Management Fee Expense Debt instruments, trading, at fair value Listed equity securities Related party debt maturity date Related Party Transaction, Date Trading Debt interest rate Related Party Transaction, Rate Interest Income, Related Party Interest Income, Related Party Investor relations fee monthly Related Party Transaction, Expenses from Transactions with Related Party Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivatives not designated as hedging instruments (notional amounts) Not Designated as Hedging Instrument [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Commodity Contract [Member] Commodity Contract [Member] Credit Default Swap, issued Credit Default Swap, Selling Protection [Member] Credit default swaps, purchased Credit Default Swap, Buying Protection [Member] Forwards Foreign Exchange Forward [Member] Futures Future [Member] Interest rate options Interest Rate Swaption [Member] Interest rate swaps Interest Rate Swap [Member] Options, warrants, and rights Options, Warrants and Rights [Member] Options, Warrants and Rights that are classified as derivative instruments, not designated for hedging purposes Total return swaps – equities Total Return Swap [Member] Weather derivative swap Weather derivative swap [Member] A type of swap transaction in which one party makes periodic payments to the other and receives the promise of a pay-off if an specified weather related event occurs. Underlying Asset Class [Axis] Underlying Asset Class [Axis] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Corporate Debt Corporate Debt Securities [Member] Sovereign debt – Non U.S. Sovereign Debt [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Net investment income (loss) Net Investment Income (Loss) [Member] Net Investment Income (Loss) [Member] Other income (expense), net Other Operating Income (Expense) [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Entered Derivative, Notional Amount of Contracts Entered The notional amount of the derivative contracts entered into during the period. Exited Derivative, Notional Amount of Contracts Exited The notional amount of derivative contracts exited during the period Gain (loss) on derivatives recognized in income Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Financial contracts receivable Derivative Financial Instruments, Assets [Member] Financial contracts payable Derivative Financial Instruments, Liabilities [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] 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] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Beginning balance, Liabilities Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Purchases, Liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Sales, Liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Issuances, Liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Settlements, Liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Total realized and unrealized gains (losses) and amortization included in earnings, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Total realized and unrealized gains (losses) and amortization included in earnings, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization Expense Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization Expense Included in Earnings Total realized and unrealized gains (losses) Included in earnings, Liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Transfers Into Level 3, Liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Transfers out of Level 3, Liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Ending balance Ending balance, Liabilities Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Future commitments [Line Items] Operating Leased Assets [Line Items] Annual rent payments Operating Leases, Rent Expense, Minimum Rentals Operating Leases, Rent Expense Operating Leases, Rent Expense Operating lease renewal option Lessee Leasing Arrangements, Operating Leases, Renewal Term Operating Lease obligations, 2016 Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating lease obligations, 2017 Operating Leases, Future Minimum Payments, Due in Two Years Operating lease obligations, 2018 Operating Leases, Future Minimum Payments, Due in Three Years Operating lease obligations, 2019 Operating Leases, Future Minimum Payments, Due in Four Years Operating lease obligations, 2020 Operating Leases, Future Minimum Payments, Due in Five Years Operating lease obligations, Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating lease obligations, Total Operating Leases, Future Minimum Payments Due Private equity and limited partnerships, 2016 Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months Private equity and limited partnerships, 2017 Unrecorded Unconditional Purchase Obligation, Due within Two Years Private equity and limited partnerships, 2018 Unrecorded Unconditional Purchase Obligation, Due within Three Years Private equity and limited partnerships, 2019 Unrecorded Unconditional Purchase Obligation, Due within Four Years Private equity and limited partnerships, 2020 Unrecorded Unconditional Purchase Obligation, Due within Five Years Private equity and limited partnerships, Thereafter Unrecorded Unconditional Purchase Obligation, Due after Five Years Private equity and limited partnerships, Total Unrecorded Unconditional Purchase Obligation 2016 Contractual Obligation, Future Minimum Payments Due, Remainder of Fiscal Year 2017 Contractual Obligation, Due in Second Year 2018 Contractual Obligation, Due in Third Year 2019 Contractual Obligation, Due in Fourth Year 2020 Contractual Obligation, Due in Fifth Year Thereafter Contractual Obligation, Due after Fifth Year Total Contractual Obligation SEGMENT REPORTING Segment Reporting Disclosure [Text Block] Cash and Cash Equivalents [Abstract] Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash at banks Cash Held in Banks [Member] Cash Held in Banks [Member] Cash held with brokers Cash Held by Brokers [Member] Cash Held by Brokers [Member] Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Total cash and cash equivalents Cash and Cash Equivalents, at Carrying Value RSUs Restricted Stock Units (RSUs) [Member] Share-based compensation expense Allocated Share-based Compensation Expense Number of non-vested restricted shares, Granted Number of non-vested restricted shares, Vested Number of non-vested restricted shares, Forfeited Weighted average grant date fair value, Vested Weighted average grant date fair value, Forfeited Summary of Investments, Other than Investments in Related Parties [Abstract] SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES Summary of Investments, Other than Investments in Related Parties [Text Block] Equity [Abstract] SHARE CAPITAL Stockholders' Equity Note Disclosure [Text Block] Supplementary Insurance Information [Abstract] SUPPLEMENTARY INSURANCE INFORMATION Supplementary Insurance Information, for Insurance Companies Disclosure [Text Block] NET INVESTMENT INCOME NET INVESTMENT INCOME (LOSS) DISCLOSURE [Text Block] The entire disclosure for net income earned from investments in securities and other investments including derivatives. Generally, the disclosure includes interest, dividend and other investment income, interest dividends and other investment expenses, investment related fees, as well as realized gains and losses and change in unrealized gains and losses on all investments. Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Fair Value, Concentration of Risk [Table] Fair Value, Concentration of Risk [Table] Percent of Stockholders' Equity, Total Stockholders' Equity, Total [Member] Percent Investment Concentration Risk Investment Concentration Risk [Member] Investment Concentration Risk [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Micron Technology Inc. Micron Technology Incorporated [Member] Micron Technology Incorporated [Member] Commodities Investment in Gold [Member] Investment in Gold [Member] Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Realized gains Realized Gain (Loss) on Marketable Securities, Cost Method Investments, and Other Investments Gross realized gains Trading Securities, Realized Gain Gross realized losses Trading Securities, Realized Loss Change in unrealized gains and losses on trading securities Trading Securities, Change in Unrealized Holding Gain (Loss) Fair value of cash and investments that have been pledged as security against letters of credit issued Pledged Financial Instruments, Not Separately Reported, Securities for Letter of Credit Facilities Restricted cash pledged as security relating to regulatory trusts Pledged Assets, Not Separately Reported, Other Fair value of investments in excess of 10% of stockholders' equity Fair Value, Concentration of Risk, Investments Summary of Investments, Other than Investments in Related Parties [Table] Summary of Investments, Other than Investments in Related Parties [Table] Summary of Investments, Other than Investments in Related Parties, by Type [Axis] Summary of Investments, Other than Investments in Related Parties, by Type [Axis] Summary of Investments, by Type [Domain] Summary of Investments, by Type [Domain] Debt instruments, trading, at fair value Fixed Maturities [Member] Listed equity securities Total investments, trading Trading Securities [Member] Private and unlisted equity securities Total other investments, at fair value Other than Securities Investment [Member] Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] Cost Summary of Investments, Other than Investments in Related Parties, Cost Fair Value Summary of Investments, Other than Investments in Related Parties, Fair Value Balance Sheet Value Summary of Investments, Other than Investments in Related Parties, Carrying Amount Derivative [Table] Derivative [Table] Credit default swaps (1) Options, warrants, and rights Options Held [Member] Total return swaps Derivative [Line Items] Derivative [Line Items] Fixed Assets Table Property, Plant and Equipment [Table Text Block] Schedule of Weighted Average Number of Shares Schedule of Weighted Average Number of Shares [Table Text Block] Schedule of Line of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Contractual Obligation, Fiscal Year Maturity Schedule Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] DUE TO PRIME BROKERS Due to and from Broker-Dealers and Clearing Organizations Disclosure [Text Block] Investments Sold, Not yet Purchased [Table] Investments Sold, Not yet Purchased [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Securities Sold, Not yet Purchased Securities Sold, Not yet Purchased [Member] Corporate debt – U.S. Domestic Corporate Debt Securities [Member] Sovereign debt – Non U.S. Foreign Government Debt [Member] Investments Sold, Not yet Purchased [Line Items] Investments Sold, Not yet Purchased [Line Items] Proceeds Investment Sold, Not yet Purchased, Sale Proceeds Fair value Investment Sold, Not yet Purchased, at Fair Value Net Investment Income (Loss) Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options Employee Stock Option [Member] 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] Weighted average shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Effect of dilutive service provider share-based awards Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements, Service Provider The incremental number of shares used in the calculationg of dilutied EPS as a result of dilutive effect relating to non-employee share based compensation Effect of dilutive employee and director share-based awards Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements, Employees and Directors Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements, Employees and Directors Weighted average shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Anti-dilutive outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Parent Company Parent Company [Member] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Assets Assets [Abstract] Cash and cash equivalents Investment in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Notes receivable Financing Receivable, Net Due from subsidiaries Due from Affiliates Total assets Assets Liabilities and equity Liabilities and Equity [Abstract] Liabilities Liabilities [Abstract] Due to subsidiaries Due to Affiliate Total liabilities Liabilities Equity Stockholders' Equity Attributable to Parent [Abstract] Share capital Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Shareholders’ equity attributable to shareholders Stockholders' Equity Attributable to Parent Total liabilities and equity Liabilities and Equity Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Financial contracts receivable Financial contracts payable Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Quoted prices in active markets (Level 1) Fair Value, Inputs, Level 1 [Member] Other income (expense), net 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] Financial contracts payable, Transfers Into Level 3 Transfers out of Level 3 Amount transferred from Level 2 to Level 1 due to lock-up period restriction expiration Fair Value, Assets, Level 2 to Level 1 Transfers, Amount Total realized and unrealized gains (losses)included in earnings, net Change in unrealized (losses) gains Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Quarterly Financial Information Disclosure [Abstract] QUARTERLY FINANCIAL RESULTS (UNAUDITED) Quarterly Financial Information [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Revenues Revenues [Abstract] Gross premiums ceded Ceded Premiums Written Net premiums written Premiums Written, Net Change in net unearned premium reserves (Increase) Decrease in Unearned Premiums, Net Net premiums earned Premiums Earned, Net Net investment income (loss) Other income (expense), net Other Operating Income (Expense), Net Total revenues Expenses Benefits, Losses and Expenses [Abstract] Acquisition costs, net Deferred Policy Acquisition Cost, Amortization Expense General and administrative expenses General and Administrative Expense Total expenses Benefits, Losses and Expenses Income (loss) before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax (expense) benefit Net income (loss) including non-controlling interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Loss (income) attributable to non-controlling interest in joint venture Noncontrolling Interest in Net Income (Loss) Joint Venture Partners, Nonredeemable Net income (loss) Net Income (Loss) Attributable to Parent Earnings (loss) per share Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted average number of ordinary shares used in the determination of earnings and loss per share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Diluted RETROCESSION Reinsurance [Text Block] SHARE-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Condensed Income Statement [Table] Condensed Income Statement [Table] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Investment income Investment Income, Nonoperating Net income (loss) before equity in earnings of consolidated subsidiaries Equity in earnings of consolidated subsidiaries Income (Loss) from Equity Method Investments Gross premiums written by brokers greater than 10% of premiums Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Gross Premiums Written by Line of Business Schedule of Segment Reporting Information, by Segment [Table Text Block] Gross Premiums Written by Geographic Area of Risks Insured Revenue from External Customers by Products and Services [Table Text Block] Risk free rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Estimated volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Forfeiture rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Forfeiture Rate The estimate of service period not being met and as a result the share based awards being forfeited prior to vesting. Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract] SUPPLEMENTARY REINSURANCE INFORMATION Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Text Block] Insurance Loss Reserves [Abstract] Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Line Items] Liability for Claims and Claims Adjustment Expense [Line Items] Case reserves Liability for Unpaid Claims and Claims Adjustment Expense, Reported Claims, Amount IBNR Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Total Liability for Claims and Claims Adjustment Expense Schedule of Restricted Cash and Cash Equivalents [Table] Schedule of Restricted Cash and Cash Equivalents [Table] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash held by prime brokers relating to securities sold, not yet purchased Cash Held by Prime Brokers, Securities Sold, Not Yet Purchased [Member] Cash Held by Prime Brokers, Securities Sold, Not Yet Purchased [Member] Cash collateral relating to letters of credit issued Cash Collateral, Letters of Credit Issued [Member] Cash Collateral, Letters of Credit Issued [Member] Trust Accounts [Member] Trust Accounts [Member] Trust accounts pledged to clients for statutory purposes as collateral under reinsurance agreements. Cash and cash equivalents held by swap counterparties Cash and Cash Equivalents Held by Swap Counterparties [Member] Cash and Cash Equivalents Held by Swap Counterparties [Member] Total restricted cash and cash equivalents Restricted Cash and Cash Equivalents Supplier [Axis] Supplier [Axis] Share-based Goods and Nonemployee Services Transaction, Supplier [Domain] Share-based Goods and Nonemployee Services Transaction, Supplier [Domain] Service Provider Service Provider [Member] Service Provider [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Director Director [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Vesting on Grant Date Grant Date [Member] Grant Date [Member] Vesting In Year 1 Vesting In Year One [Member] Vesting In Year One [Member] Vesting In Year 2 Vesting In Year Two [Member] Vesting In Year Two [Member] Vesting In Year 3 Vesting In Year Three [Member] Vesting In Year Three [Member] General and Administrative Expense General and Administrative Expense [Member] Number of share purchase options granted to service provider (shares) Share-based Goods and Nonemployee Services Transaction, Shares Approved for Issuance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Restricted shares issued pursuant to stock incentive plan Stock Issued During Period, Shares, Restricted Stock Award, Gross Cliff vesting period after date of issuance Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Restricted shares forfeited by employees who left the Company prior to the vesting period Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Stock compensation expense relating to forfeited restricted shares reversed Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Unrecognized compensation costs related to non-vested restricted shares Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Weighted average period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 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 Share purchase options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Expiration period after the grant date Grant date fair value of the options Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Total compensation cost related to non-vested options not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Number of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Issuance of shares as a result of stock options exercised Stock Issued During Period, Shares, Share-based Compensation, Gross Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Weighted average remaining contractual term for options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Number of stock options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate intrinsic value of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value of options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Number of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Weighted average grant date fair value of options vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Deferred acquisition costs, net Supplementary Insurance Information, Deferred Policy Acquisition Costs Reserves for losses and loss adjustment expenses – gross Supplementary Insurance Information, Liability for Future Policy Benefits, Losses, Claims and Loss Expense Reserves Unearned premiums – gross Supplementary Insurance Information, Unearned Premiums Net premiums earned Supplementary Insurance Information, Premium Revenue Net investment income (loss) Supplementary Insurance Information, Net Investment Income Net losses, and loss adjustment expenses Supplementary Insurance Information, Benefits, Claims, Losses and Settlement Expense Amortization of deferred acquisition costs Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Costs Other operating expenses Supplementary Insurance Information, Other Operating Expense Gross premiums written Supplementary Insurance Information, Premiums Written Schedule of Restricted Cash and Cash Equivalents Schedule of Restricted Cash and Cash Equivalents [Table Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Computer software Software and Software Development Costs [Member] Furniture and fixtures Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Cost Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net book value Property, Plant and Equipment, Net Fixed asset estimated useful lives Property, Plant and Equipment, Useful Life Impairment of fixed assets Impairment of Long-Lived Assets Held-for-use Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of options, Balance at beginning of period Number of options, Granted Number of options, Exercised Number of options, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Number of options, Expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Number of options, Balance at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price, Balance at beginning of period Weighted average exercise price, Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price, Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, Forfeited Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted average exercise price, Expired Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Weighted average exercise price, Balance at end of period Share-based compensation arrangement by share-based payment award, Options, Weighted Average Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value, Balance at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Granted Weighted average grant date fair value, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Forfeited Share-based compensation arrangement by share-based payment award, Options, Forfeited in period, weighted average grant date fair value Share-based compensation arrangement by share-based payment award, Options, Forfeited in period, weighted average grant date fair value Weighted average grant date fair value, Expired Share-based compensation arrangement by share-based payment award, Options, Expired in period, weighted average grant date fair value Share-based compensation arrangement by share-based payment award, Options, Expired in period, weighted average grant date fair value Weighted average grant date fair value, Balance at end of period Schedule of Components of Income Tax Benefit (Expense) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Current tax (expense) benefit Tax recovered Tax Adjustments, Settlements, and Unusual Provisions Deferred tax (expense) benefit Income tax (expense) benefit Statement of Financial Position [Abstract] Investments Investments [Abstract] Other investments, at fair value Other Investments Total investments Investments Restricted cash and cash equivalents Financial contracts receivable, at fair value Reinsurance balances receivable Premiums and Other Receivables, Net Deferred acquisition costs, net Deferred Policy Acquisition Costs Unearned premiums ceded Prepaid Reinsurance Premiums Other assets Other Assets Securities sold, not yet purchased, at fair value Financial Instruments Sold, Not yet Purchased, at Fair Value Financial contracts payable, at fair value Due to prime brokers Loss and loss adjustment expense reserves Liability for Claims and Claims Adjustment Expense, Property Casualty Liability Unearned premium reserves Unearned Premiums Reinsurance balances payable Reinsurance Payable Funds withheld Other liabilities Other Liabilities Preferred share capital (par value $0.10; authorized, 50,000,000; none issued) Preferred Stock, Value, Issued Ordinary share capital (Class A: par value $0.10; authorized, 100,000,000; issued and outstanding, 30,772,572 (2014: 31,129,648): Class B: par value $0.10; authorized, 25,000,000; issued and outstanding, 6,254,895 (2014: 6,254,895)) Non-controlling interest in joint venture Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Restricted Cash and Cash Equivalents Restricted Cash and Cash Equivalents [Member] Restricted Cash and Cash Equivalents [Member] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] RESTRICTED CASH AND CASH EQUIVALENTS Cash and Cash Equivalents Disclosure [Text Block] Shareholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred share capital, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred share capital, authorized (in shares) Preferred Stock, Shares Authorized Preferred share capital, issued (in shares) Preferred Stock, Shares Issued Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Ordinary share capital, authorized (in shares) Common Stock, Shares Authorized Ordinary share capital, issued (in shares) Common Stock, Shares, Issued Ordinary share capital, outstanding (in shares) Common Stock, Shares, Outstanding Reinsurance Premiums for Insurance Companies, by Product Segment [Table] Reinsurance Premiums for Insurance Companies, by Product Segment [Table] Property & Casualty Property, Liability and Casualty Insurance Product Line [Member] Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] Direct gross premiums Direct Premiums Earned Premiums ceded to other companies Ceded Premiums Earned Premiums assumed from other companies Assumed Premiums Earned Percentage of amount assumed to net Premiums, Percentage Assumed to Net CONDENSED FINANCIAL INFORMATION OF REGISTRANT Condensed Financial Information of Parent Company Only Disclosure [Text Block] Cash and Cash Equivalents Cash and Cash Equivalents [Member] CASH AND CASH EQUIVALENTS OTC options NO MARKET (E.G. UNLISTED) [Member] Put options (3) Put Option [Member] Call options Call Option [Member] Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Financial Standby Letter of Credit Financial Standby Letter of Credit [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Bank of America, N.A. Bank of America, N.A. [Member] Bank of America, N.A. Butterfield Bank (Cayman) Limited Butterfield Bank (Cayman) Limited [Member] Butterfield Bank (Cayman) Limited Citibank Europe plc Citibank Europe plc [Member] Citibank Europe plc JP Morgan Chase Bank N.A. JP Morgan Chase Bank N.A. [Member] JP Morgan Chase Bank N.A. Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Facility Line of Credit Facility, Maximum Borrowing Capacity Notice period required for termination Line of Credit Facility, Termination Notice Period Termination notice period for LOC facilities Aggregate amount of letters of credit issued Letters of Credit Outstanding, Amount Total equity securities, restricted cash, and cash and cash equivalents fair value pledged as security against the letters of credit Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Jurisdiction [Axis] Jurisdiction [Axis] Statutory Accounting Practices, Jurisdiction [Domain] Statutory Accounting Practices, Jurisdiction [Domain] Cayman Islands CAYMAN ISLANDS Stock Compensation Plan Stock Compensation Plan [Member] Class of Stock [Line Items] Class of Stock [Line Items] Preferred shares issued Preferred shares outstanding Preferred Stock, Shares Outstanding Number of entitled votes per share Common Stock, Voting Rights Number of Votes per Share Common Stock, Voting Rights Number of Votes per Share Percentage of total voting power of all issued and outstanding ordinary shares Common Stock, Percentage of Total Voting Power Common Stock, Percentage of Total Voting Power Registration rights Common Stock, Registration Rights Ownership Percentage Percentage of holders of outstanding Registrable Securities that have the right to request to have their Registrable Securities become registered. Aggregate principal amount of securities Registration Statement, Unused Aggregate Principal Amount of Securities Aggregate principal amount of securities available under the unused registration Form S-3 Shares authorized for issuance in relation to share purchase options granted to service provider Shares authorized for the company's stock incentive plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares available for future issuance Common Stock, Capital Shares Reserved for Future Issuance Shares authorized to purchase under the share repurchase plan Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchase Program Expiration Date Stock Repurchase Program Expiration Date Number of shares available under share repurchase plan Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Increase (Decrease) in Common Stock [Roll Forward] Increase (Decrease) in Common Stock [Roll Forward] Increase (Decrease) in Common Stock [Roll Forward] Balance – beginning of year Issue of ordinary shares, net of forfeitures Stock Issued During Period, Shares, Period Increase (Decrease) Repurchase of ordinary shares Stock Repurchased During Period, Shares Class B shares converted to Class A shares Conversion of Stock, Shares Issued Class B shares converted to Class A shares Conversion of Stock, Shares Converted Balance – end of year Minimum net worth requirement Statutory Accounting Practices, Statutory Capital and Surplus Required Insurance Regulations Minimum Capital Requirement Insurance Regulations, Capital Required for Capital Adequacy Insurance Regulations, Minimum Capital Required for Capital Adequacy Statutory capital and surplus Statutory Accounting Practices, Statutory Capital and Surplus, Balance Net income Statutory Accounting Practices, Statutory Net Income Amount Amount of retained earnings restricted from payment of dividends Statutory Accounting Practices, Retained Earnings Not Available for Dividends Cash Dividends Paid to Parent Company by Consolidated Subsidiaries Cash Dividends Paid to Parent Company by Consolidated Subsidiaries Amount of capital and surplus available for distribution as dividends Statutory Accounting Practices, Statutory Amount Available for Dividend Payments Par value per share Corporate debt – Non U.S. Foreign Corporate Debt Securities [Member] Municipal debt – U.S. Municipal Bonds [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Ordinary share capital Additional paid-in capital Additional Paid-in Capital [Member] Retained earnings Retained Earnings [Member] Shareholders' equity attributable to shareholders Parent [Member] Non-controlling interest in joint venture Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Issue of Class A ordinary shares, net of forfeitures Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Repurchase of Class A ordinary shares Stock Repurchased During Period, Value Short-swing sale profit from shareholder Adjustments to Additional Paid in Capital, Other Non-controlling interest contribution into (withdrawal from) joint venture, net Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Income (loss) attributable to non-controlling interest in joint venture Net income (loss) Share-based compensation expense, net of forfeitures Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Ending balance Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by (used in) operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Equity in earnings of consolidated subsidiaries Share-based compensation expense, net of forfeitures Share-based Compensation Net change in Increase (Decrease) in Operating Capital [Abstract] Due from subsidiaries Increase (Decrease) Due from Affiliates Due to subsidiaries Increase (Decrease) in Due to Affiliates Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Change in notes receivable, net Increase (Decrease) in Notes Receivables Contributed surplus to subsidiaries, net Payments to Acquire Businesses and Interest in Affiliates Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net proceeds from exercise of stock options Proceeds from Stock Options Exercised Short-swing sale profit from shareholder Proceeds from (Payments for) Other Financing Activities Repurchase of Class A ordinary shares Payments for Repurchase of Common Stock Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of the period Cash and cash equivalents at end of the period Debt instruments Commodities Investment in Physical Commodities, Fair Value Disclosure Private and unlisted equity securities Private and Unlisted Equity Securities, Fair Value Disclosure Private and Unlisted Equity Securities, Fair Value Disclosure Total investment assets Assets, Fair Value Disclosure Listed equity securities, sold not yet purchased Financial Instruments Sold, Not yet Purchased, Corporate Equities Debt instruments, sold not yet purchased Financial Instruments Sold, Not yet Purchased, Other Sovereign Government Debt Financial contracts payable Total investment liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Condensed Financial Statements [Table] Condensed Financial Statements [Table] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Schedule of Condensed Balance Sheet Condensed Balance Sheet [Table Text Block] Schedule of Condensed Income Statement Condensed Income Statement [Table Text Block] Schedule of Condensed Cash Flow Statement Condensed Cash Flow Statement [Table Text Block] Forwards Forward Contracts [Member] Warrants and rights on listed equities Warrant [Member] Schedule of Derivative Instruments Financial contracts receivable, Notional amount of underlying instruments Derivative Asset, Notional Amount Financial contracts payable, Notional amount of underlying instruments Derivative Liability, Notional Amount Financial contracts receivable, Fair value of net assets (obligations) on financial contracts Financial contracts payable, Fair value of net assets (obligations) on financial contracts Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Other Liabilities Other Liabilities [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Prior Period Reclassification Adjustment Prior Period Reclassification Adjustment Premium deficiency loss Premium deficiency loss Premium deficiency loss represents the expensing for unrecoverability of deferred acquistion costs for which the sum of future earned premiums and anticipated investment income is less than the expected future claims and expenses. If a loss is probable on the unexpired portion of policies in force, a premium deficiency loss is recognized. Profit commission reserves Profit Commissions Payable Accrual of profit sharing commissions payable to ceding insurer based on contract terms Profit commission expense, net Profit commission expense Profit commission expense incurred or paid to the ceding insurer as a refund of a portion of the excess of premiums earned over estimated claims and expenses and a profit factor, which is usually based upon an agreed upon formula. Notes receivable interest rate Notes Receivable Interest Rate The lowest interest rate for the notes receivable Maturity term of note receivable Maturity Term of Note Receivable Earliest maturity term for notes receivable (in years) Amount of notes receivable placed on non-accrual status Financing Receivable, Recorded Investment, Nonaccrual Status Impairment charge relating to accrued interest and principal on the note placed on non-accrual status Other Asset Impairment Charges Gain (Loss) on Sale of Notes Receivable Gain (Loss) on Sale of Notes Receivable Accrued interest Interest Receivable Provision for uncollectible notes Allowance for Notes, Loans and Financing Receivable, Noncurrent Deposit assets Deposit Contracts, Assets Deposit liabilities Deposit Contracts, Liabilities Losses on deposit accounted contracts Loss on Deposit Contracts Loss on Deposit Contracts Gain on deposit accounted contracts Gain on Deposit Contracts Gain on insurance contracts accounted for as deposit contracts. Accrued bonuses Accrued Bonuses Annual installment period to pay quantitative bonus Quantitative Bonus Annual Installment Period Quantitative Bonus Annual Installment Period Schedule of Quarterly Financial Information Schedule of Quarterly Financial Information [Table Text Block] TAXATION Income Tax Disclosure [Text Block] Shares issued from initial public offering Stock Issued During Period, Shares, New Issues Price per share of shares issued from initial public offering Shares Issued, Price Per Share Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Basic Diluted Weighted Average Number of Shares Outstanding, Diluted LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash provided by (used in) operating activities Net income (loss) Net change in unrealized gains and losses on investments and financial contracts Change In Unrealized Gains Losses On Investments And Derivatives The net increase (decrease) in fair value of unsold investments and derivatives not held for hedging whose gains and losses are included in net income. Net realized gains on investments and financial contracts Foreign exchange (gains) losses on investments Income (loss) attributable to non-controlling interest in joint venture Depreciation expense Depreciation, Nonproduction Reinsurance balances receivable Increase (Decrease) in Premiums Receivable Loss and loss adjustment expenses recoverable Increase (Decrease) in Reinsurance Recoverable Deferred acquisition costs, net Increase (Decrease) in Deferred Policy Acquisition Costs Unearned premiums ceded Increase (Decrease) in Prepaid Reinsurance Premiums Other assets Increase (Decrease) in Other Operating Assets Loss and loss adjustment expense reserves Increase (Decrease) in Loss and Loss Adjustment Expense Reserve Unearned premium reserves Increase (Decrease) in Unearned Premiums Reinsurance balances payable Increase (Decrease) in Reinsurance Payables Funds withheld Increase (Decrease) in Funds Held under Reinsurance Agreements Other liabilities Increase (Decrease) in Other Operating Liabilities Net cash (used in) provided by operating activities Purchases of investments, trading Payments to Acquire Trading Securities Held-for-investment Sales of investments, trading Proceeds from (Payments for) Trading Securities, Short-term Purchases of financial contracts Payments for Derivative Instrument, Investing Activities Dispositions of financial contracts Proceeds from Derivative Instrument, Investing Activities Securities sold, not yet purchased Proceeds from in Securities Sold under Agreements to Repurchase Gross proceeds from securities sold not yet purchased (sold short) during the year as part of investing activities. Dispositions of securities sold, not yet purchased Payments for Securities Sold under Agreements to Repurchase Gross cash outflows resulting from disposition of securities sold, not yet purchased (short sales) during the period as a result of investing activities. Change in due to prime brokers Increase (Decrease) in Payables to Broker-Dealers and Clearing Organizations Change in restricted cash and cash equivalents, net Increase (Decrease) in Restricted Cash Non-controlling interest withdrawal from joint venture, net Proceeds from (Payments to) Noncontrolling Interests Fixed assets additions Payments to Acquire Property, Plant, and Equipment Supplementary information Supplemental Cash Flow Information [Abstract] Interest paid in cash Interest Paid Income tax paid in cash Income Taxes Paid Interest received in cash Proceeds from Interest Received Noncash Investing and Financing Activities - Transfer to Notes Receivable Noncash Investing and Financing Activities - Transfer to Notes Receivable Supplemental cash flow disclosure for Noncash Investing and Financing Activities - Transfer of reinsurance balances receivable to (from) notes receivable. Schedule of Common Stock Outstanding Roll Forward Schedule of Common Stock Outstanding Roll Forward [Table Text Block] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table] Reinsurance Policy, Type [Axis] Reinsurance Policy, Type [Axis] Reinsurance Policy [Domain] Reinsurance Policy [Domain] Commercial Automobile Business Commercial Automobile Business [Member] Commercial Automobile Business [Member] Private Passenger Automobile Business Non standard Automobile Business [Member] Non standard Automobile Business [Member] Casualty Clash Contract Casuality Clash Contract [Member] Casuality Clash Contract [Member] Commercial motor contracts in run-off since 2010 Commercial motor contracts in run-off since 2010 [Member] Commercial motor contracts in run-off since 2010 [Member] Commercial motor related to multi-line contracts Commercial motor related to multi-line contracts [Member] Commercial motor related to multi-line contracts [Member] Homeowners' property contracts Homeowners' property contracts [Member] Homeowners' property insurance contracts [Member] Noncatastrophic Event [Axis] Noncatastrophic Event [Axis] Noncatastrophic Event [Domain] Noncatastrophic Event [Domain] Construction Defects - Single Family Homes [Member] Construction Defects - Single Family Homes [Member] Construction defect claims - single family homes [Member] Construction Defects - Other [Member] Construction Defects - Other [Member] Construction Defects - Other [Member] Commutation of contract [Member] Commutation of contract [Member] Commutation of Contract Catastrophic Event [Axis] Catastrophic Event [Axis] Catastrophic Event [Domain] Catastrophic Event [Domain] Hurricane Hurricane [Member] Earthquake Earthquake [Member] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) Reinstatement (reversal) of premiums earned Reinstatement (Reversal) of Premiums Earned Reinstatement (Reversal) of Premiums Earned Full limit loss under contract Liability for Catastrophe Claims, Carrying Amount Ceding commissions Insurance Commissions Profit commission expense Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract] Schedule of Liability for Unpaid Claims and Claims Adjustment Expense Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Gross balance at January 1 Less: Losses recoverable Net balance at January 1 Liability for Unpaid Claims and Claims Adjustment Expense, Net Incurred losses related to Current year Current Year Claims and Claims Adjustment Expense Incurred losses related to Prior years Prior Year Claims and Claims Adjustment Expense Incurred losses related to Total incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Paid losses related to Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Paid losses related to Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Paid losses related to Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Foreign currency revaluation Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Exchange Net balance at December 31 Add: Losses recoverable Gross balance at December 31 Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Commodities Commodities Investment [Member] Cost Other Investments, Cost Other Investments, Cost Unrealized gains Other Investments, Accumulated Gross Unrealized Holding Gain Other Investments, Accumulated Gross Unrealized Holding Gain Unrealized losses Other Investments, Accumulated Gross Unrealized Holding Loss Other Investments, Accumulated Gross Unrealized Holding Loss Fair value Other Investments, Fair Value Disclosure Other Investments, Fair Value Disclosure