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Mortgage Loans on Real Estate (Aging of Financing Receivables) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mortgage Loans on Real Estate [Abstract]      
30 to 59 days $ 0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue $ 0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue  
60 to 89 days 0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue 0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue  
90 days and over 0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue 0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue  
Total past due 0us-gaap_FinancingReceivableRecordedInvestmentPastDue 0us-gaap_FinancingReceivableRecordedInvestmentPastDue  
Current 2,451,760us-gaap_FinancingReceivableRecordedInvestmentCurrent 2,599,524us-gaap_FinancingReceivableRecordedInvestmentCurrent  
Collateral dependent receivables 5,961ael_MortgageLoansOnRealEstateCollateralDependent 8,174ael_MortgageLoansOnRealEstateCollateralDependent  
Principal outstanding $ 2,457,721us-gaap_LoansReceivableCommercialRealEstate $ 2,607,698us-gaap_LoansReceivableCommercialRealEstate $ 2,658,883us-gaap_LoansReceivableCommercialRealEstate