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Mortgage Loans on Real Estate (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
loans
portfolio_segment
Mar. 31, 2014
loans
Dec. 31, 2014
Mortgage Loans on Real Estate [Abstract]      
Mortgage loans on real estate $ 2,433,757,000us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet   $ 2,434,580,000us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
Commitments outstanding 87,000,000us-gaap_LoansAndLeasesReceivableCommercialLoansInProcess    
Number of portfolio segments that make up financing receivables 1ael_FinancingReceivableNumberofPortfolioSegments    
Number of mortgage loans satisfied by foreclosure 0ael_MortgageLoansOnRealEstateNumberOfLoansSatisfiedByForeclosure 1ael_MortgageLoansOnRealEstateNumberOfLoansSatisfiedByForeclosure  
Impaired mortgage loans, workout terms, interest only payments, six month terms 6 months    
Impaired mortgage loans, workout terms, interest only payments, twelve month terms 12 months    
Impaired mortgage loans, workout terms, cash flow sweep, number of months 12 months    
Number of days past due, delinquent status 60 days    
Number of days past due, non-accrual status 90 days    
Outstanding principal of loans in a non-accrual status $ 4,800,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus   $ 6,000,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus