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Subordinated Debentures (Summary of Subordinated Debt Obligations to the Trusts) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Subordinated Borrowing [Line Items]    
Subordinated debentures $ 246,243us-gaap_SubordinatedDebt $ 246,050us-gaap_SubordinatedDebt
American Equity Capital Trust II [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 76,633us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIiMember
76,440us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIiMember
Interest rate 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIiMember
 
Subordinated borrowing, due date Jun. 01, 2047  
American Equity Capital Trust III [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 27,840us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIiiMember
27,840us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIiiMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.90%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIiiMember
 
Subordinated borrowing, due date Apr. 29, 2034  
American Equity Capital Trust IV [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 12,372us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIvMember
12,372us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIvMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 4.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIvMember
 
Subordinated borrowing, due date Jan. 08, 2034  
American Equity Capital Trust VII [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 10,830us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustViiMember
10,830us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustViiMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustViiMember
 
Subordinated borrowing, due date Dec. 14, 2034  
American Equity Capital Trust VIII [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 20,620us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustViiiMember
20,620us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustViiiMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustViiiMember
 
Subordinated borrowing, due date Dec. 15, 2034  
American Equity Capital Trust IX [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 15,470us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIxMember
15,470us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIxMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustIxMember
 
Subordinated borrowing, due date Jun. 15, 2035  
American Equity Capital Trust X [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 20,620us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXMember
20,620us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXMember
 
Subordinated borrowing, due date Sep. 15, 2035  
American Equity Capital Trust XI [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures 20,620us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXiMember
20,620us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXiMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXiMember
 
Subordinated borrowing, due date Dec. 15, 2035  
American Equity Capital Trust XII [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures $ 41,238us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXiiMember
$ 41,238us-gaap_SubordinatedDebt
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXiiMember
Description of variable rate basis *LIBOR + [1]  
Basis spread on variable rate 3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_SubordinatedBorrowingAxis
= ael_AmericanEquityCapitalTrustXiiMember
 
Subordinated borrowing, due date Apr. 07, 2036  
[1] three month London Interbank Offered Rate