Document and Entity Information [Abstract] Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Consolidated Balance Sheets [Abstract] ASSETS: Amount of debt securities categorized neither as held-to-maturity nor trading, held at market value. Available For Sale Securities Debt Securities Market Value Fixed maturity securities - available for sale, Market Value Fixed maturities, market value Fixed maturities - available for sale, at market value (amortized cost: 2015, $13,213,596; 2014, $12,831,159) Fixed maturities - available for sale, at market value Fixed maturities - available for sale, at fair value Fixed maturities, fair value Amount of equity securities categorized neither as held-to-maturity nor as trading, held at market value. Available For Sale Securities Equity Securities Market Value Equity securities - available for sale, at market value (cost: 2015, $147,512; 2014, $148,326) Equity securities, market value Equity securities - available for sale, at fair value Equity securities - available for sale, at fair value Equity securities, fair value Other Short Term investments Short-term investments Equity Method Investments Other invested assets (cost: 2015, $665,153; 2014, $601,925) Cash Investments and Cash Total investments and cash Accrued investment income Premiums receivable Reinsurance receivables Funds held by reinsureds Deferred acquisition costs Prepaid reinsurance premiums Federal income taxes recoverable Income taxes Other assets Assets TOTAL ASSETS LIABILITIES: Reserve for losses and loss adjustment expenses Future policy benefit reserve Unearned premium reserve Funds held under reinsurance treaties Commission reserves. Commission reserves Other net payable to reinsurers Losses In Course Of Payment Losses In Course Of Payment Losses in course of payment Senior Notes 4.868% Senior notes due 6/1/2044 Notes Payable 6.6% Long term notes due 5/1/2067 Accrued interest on debt and borrowings Equity index put option liability Other Payables to Broker-Dealers and Clearing Organizations Unsettled securities payable Other liabilities Liabilities Total liabilities NONCONTROLLING INTERESTS: Redeemable Noncontrolling Interest, Equity, Fair Value Redeemable noncontrolling interests - Mt. Logan Re, end of period Redeemable noncontrolling interests - Mt. Logan Re, beginning of period Redeemable noncontrolling interest - Mt. Logan Re CommitmentsAndContingencies2009 Commitments and contingencies (Note 9) SHAREHOLDERS' EQUITY: Preferred shares, par value: $0.01; 50 million shares authorized; no shares issued and outstanding Preferred shares, par value: $0.01; 50,000 shares authorized; no shares issued and outstanding Common Stock Values Common shares, par value: $0.01; 200,000 shares authorized; (2015) 68,555 and (2014) 68,336 outstanding before treasury shares Additional Paid In Capital Additional paid-in capital Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $94.5 million at 2010 and $101.0 million at 2009 Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $20,968 at 2015 and $20,715 at 2014 Ending balance of accumulated other comprehensive income (loss) TreasuryStockValue Treasury shares, at cost; 24,363 shares (2015) and 23,650 shares (2014) RetainedEarningsAccumulatedDeficit Retained earnings Stockholders' Equity Attributable to Parent Balance, end of period Balance, beginning of period Total shareholders' equity attributable to Everest Re Group Liabilities and Stockholders' Equity TOTAL LIABILITIES, NONCONTROLLING INTERESTS AND SHAREHOLDERS' EQUITY Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Senior Notes 4.868% [Member] Senior Notes4868 [Member] 4.868% Senior notes due 6/1/2044 [Member] Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Senior Notes [Member] Senior Notes [Member] Subordinated Debt [Member] Long Term Subordinated Notes [Member] Fixed maturity securities - available for sale, amortized cost Fixed maturity securities - available for sale, Amortized Cost Fixed maturities - available for sale, at market value, amortized cost Equity securities - available for sale, at cost Equity securities - available for sale, at market value, cost Equity Method Investment, Aggregate Cost Other invested assets, at cost Preferred shares, par value Preferred shares, authorized Preferred shares, issued Preferred shares, outstanding Common shares, par value Common shares, authorized Common Stock, Shares, Outstanding Balance, end of period, shares Balance, beginning of period, shares Common shares, outstanding Accumulated other comprehensive income (loss), deferred income tax expense (benefit) Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) Treasury shares (cost) Treasury shares Debt Instrument, Interest Rate, Stated Percentage Debt instrument, stated interest rate Date due Debt instrument, maturity date Maturity Date Consolidated Statements Of Operations And Comprehensive Income (Loss) [Abstract] REVENUES: Premiums earned Net investment income Net realized capital gains (losses): Other-than-temporary impairments on fixed maturity securities Other-than-temporary impairments on fixed maturity securities Other-than-temporary impairments Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income (loss) Other net realized capital gains (losses) Other net realized capital gains (losses) Net realized capital (gains) losses Net realized capital (gains) losses Net realized capital gains (losses) Total net realized capital gains (losses) Net derivative gain (loss) Net derivative gain (loss) Other income (expense) Other income (expense) Revenues Total revenues CLAIMS AND EXPENSES: Incurred losses and loss adjustment expenses Incurred losses and LAE Commission, brokerage, taxes and fees Commission and brokerage Other underwriting expenses Corporate expenses Corporate expenses Interest, fees and bond issue cost amortization expense Interest, fee and bond issue cost amortization expense Benefits, Losses and Expenses Total claims and expenses (LOSS) INCOME BEFORE TAXES INCOME (LOSS) BEFORE TAXES Income tax expense Income tax expense (benefit) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) NET INCOME (LOSS) Net Income (Loss) Attributable to Noncontrolling Interest Net (income) loss attributable to noncontrolling interests Net income (loss) attributable to noncontrolling interests NET (LOSS) INCOME Net income (loss) attributable to Everest Re Group NET INCOME (LOSS) ATTRIBUTABLE TO EVEREST RE GROUP Other comprehensive income (loss), net of tax : Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized appreciation (depreciation) ("URA(D)") on securities arising during the period Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Reclassification on net realized losses (gains) included in net income (loss), Net of Tax Reclassification adjustment for realized losses (gains) included in net income (loss) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Total URA(D) on securities arising during the period Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax Benefit plan actuarial net gain (loss), Net of Tax Benefit plan actuarial net gain (loss) for the period Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax Reclassification of benefit plan liability amortization included in net income (loss), Net of Tax Reclassification adjustment for amortization of net (gain) loss included in net income (loss) Other Comprehensive Income, Defined Benefit Plans Adjustment, Net of Tax Current period change in benefit plan net gain (loss) Total benefit plan net gain (loss) for the period Other comprehensive income (loss), net of tax Net increase (decrease) during the period Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Other comprehensive (income) loss attributable to noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total other comprehensive income (loss), net of tax attributable to Everest Re Group Comprehensive Income, Net of Tax, Attributable to Parent COMPREHENSIVE INCOME (LOSS) Earnings Per Common Share [Abstract] EARNINGS PER COMMON SHARE ATTRIBUTABLE TO EVEREST RE GROUP: Basic Basic Diluted Diluted Dividends declared Consolidated Statements Of Changes In Shareholders' Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Shares [Member] Additional Paid In Capital [Member] Additional Paid-In Capital [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss), Net Of Deferred Income Taxes [Member] Retained Earnings [Member] Retained Earnings [Member] Treasury Stock [Member] Treasury Shares At Cost [Member] Stock Issued During Period Value New Issues Issued during the period, shares Treasury shares acquired Treasury shares acquired, shares Issued during the period, net Issued during the period, net Stock Issued During Period Value Share Based Compensation Share-based compensation plans Dividends declared ($0.48 per quarter and $1.44 year-to-date per share in 2010 and 2009) Dividends declared ($0.95 per share in second quarter2015 and $1.90 year-to-date per share in 2015 and $0.75 per share in second quarter 2014 and $1.50 year-to-date per share in 2014) Less: dividends declared-common shares and nonvested common shares Treasury Stock Value AcquiredCostMethod Purchase of treasury shares Consolidated Statements Of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Adjustments to reconcile net income to net cash provided by operating activities: Decrease (increase) in premiums receivable Decrease (increase) in premiums receivable Increase in funds held by reinsureds, net Decrease (increase) in funds held by reinsureds, net Decrease (increase) in reinsurance receivables Decrease (increase) in reinsurance receivables Increase (Decrease) in Income Taxes Receivable Decrease (increase) in income taxes Increase (Decrease) in Prepaid Reinsurance Premiums Decrease (increase) in prepaid reinsurance premiums Increase (decrease) in reserve for losses and loss adjustment expenses Increase (decrease) in reserve for losses and loss adjustment expenses Decrease in future policy benefit reserve Increase (decrease) in future policy benefit reserve Increase (decrease) in unearned premiums Increase (Decrease) in Reinsurance Payables Increase (decrease) in other net payable to reinsurers Increase Decrease In Losses In Course Of Payment Increase Decrease In Losses In Course Of Payment Increase (decrease) in losses in course of payment Change In Equity Adjustments In Limited Partnerships Change In Equity Adjustments In Limited Partnerships Change in equity adjustments in limited partnerships Reimbursement from Limited Partnership Investment Distribution of limited partnership income Change in other assets and liabilities, net Change in other assets and liabilities, net Non-cash compensation expense Amortization of bond premium Amortization of bond premium (accrual of bond discount) Amortization of Financing Costs Amortization of underwriting discount on senior notes Net cash provided by operating activities Net cash provided by (used in) operating activities CASH FLOWS FROM INVESTING ACTIVITIES: The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities, held at market value. Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Market Value Proceeds from fixed maturities matured/called - available for sale, at market value Proceeds From Securities Matured Called Available For Sale Fixed Maturities At Fair Value Proceeds from fixed maturities matured/called - available for sale, at fair value The cash inflow associated with the sale of debt securities classified as available-for-sale securities, held at market value. Proceeds From Sale Of Available For Sale Securities Debt Market Value Proceeds from fixed maturities sold - available for sale, at market value Proceeds From Securities Sold Available For Sale Fixed Maturities At Fair Value Proceeds from fixed maturities sold - available for sale, at fair value The cash inflow associated with the sale of equity securities classified as available-for-sale securities, held at market value. Proceeds From Sale Of Available For Sale Securities Equity Market Value Proceeds from equity securities sold - available for sale, at market value Proceeds From Securities Sold Available For Sale Equity Securities At Fair Value Proceeds from equity securities sold - available for sale, at fair value Distributions from other invested assets The cash outflow to acquire debt securities classified as available-for-sale securities, because they are not classified as either held-to-maturity securities or trading securities, held at market value. Payments To Acquire Available For Sale Securities Debt Market Value Cost of fixed maturities acquired - available for sale, at market value Payments For Securities Acquired Available For Sale Fixed Maturities At Fair Value Cost of fixed maturities acquired - available for sale, at fair value The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities, held at market value. Payments To Acquire Available For Sale Securities Equity Market Value Cost of equity securities acquired - available for sale, at market value Payments For Securities Acquired Available For Sale Equity Securities At Fair Value Cost of equity securities acquired - available for sale, at fair value Payments to Acquire Interest In Subsidiaries and Affiliates Cost of other invested assets acquired Net change in short-term securities Net change in short-term investments Net change in unsettled securities transactions Net change in unsettled securities transactions Net change in unsettled securities transactions Net cash used in investing activities Net cash provided by (used in) investing activities CASH FLOWS FROM FINANCING ACTIVITIES: Common shares issued during the period, net Purchase of treasury shares Purchase of treasury shares Proceeds from Issuance of Senior Long-term Debt Net proceeds from issuance of senior notes Proceeds from Issuance of Redeemable Preferred Stock Third party investment in redeemable noncontrolling interest Subscription Advances For Third Party Redeemable Noncontrolling Interest Subscription Advances For Third Party Redeemable Noncontrolling Interest Subscription advances for third party redeemable noncontrolling interest Payments of Dividends, Common Stock Dividends paid to shareholders Payments of Ordinary Dividends, Noncontrolling Interest Dividends paid on third party investment in redeemable noncontrolling interest Net cash used in financing activities Net cash provided by (used in) financing activities EFFECT OF EXCHANGE RATE CHANGES ON CASH Net (decrease) increase in cash Net increase (decrease) in cash Cash and Cash Equivalents, at Carrying Value Cash, end of period Cash, beginning of period SUPPLEMENTAL CASH FLOW INFORMATION: Income taxes paid (recovered) InterestPaidNet Interest paid General [Abstract] General [Abstract] Nature Of Operations General Basis Of Presentation [Abstract] Organization Consolidation And PresentationOfFinancialStatementsDisclosureText Block Basis Of Presentation Investments [Abstract] Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure Text Block Investments Derivatives [Abstract] Schedule Of Derivative Instruments Text Block Derivatives Fair Value [Abstract] Fair Value Disclosures Text Block Fair Value