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Investments (Net Unrealized Gains on Available for Sale Fixed Maturity and Equity Securities Reported as a Seperate Component of Stockholders' Equity) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Investments [Abstract]    
Net unrealized gains on available for sale fixed maturity securities and equity securities $ 2,240,452ael_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesBeforeTax $ 82,992ael_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesBeforeTax
Adjustments for assumed changes in amortization of deferred policy acquisition costs and deferred sales inducements (1,165,271)ael_OtherComprehensiveIncomeLossAdjustmentsforAssumedChangesinAmortizationofDeferredPolicyAcquisitionCostsandDeferredSalesInducements (46,588)ael_OtherComprehensiveIncomeLossAdjustmentsforAssumedChangesinAmortizationofDeferredPolicyAcquisitionCostsandDeferredSalesInducements
Deferred income tax valuation allowance reversal 22,534ael_OtherComprehensiveIncomeValuationAllowanceDeferredTaxAssetReversal 22,534ael_OtherComprehensiveIncomeValuationAllowanceDeferredTaxAssetReversal
Deferred income tax expense (376,314)ael_AccumulatedOtherComprehensiveIncomeLossAvailableforsaleSecuritiesDeferredIncomeTaxExpenseBenefit (12,742)ael_AccumulatedOtherComprehensiveIncomeLossAvailableforsaleSecuritiesDeferredIncomeTaxExpenseBenefit
Net unrealized gains reported as accumulated other comprehensive income $ 721,401us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ 46,196us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax