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Subordinated Debentures (Summary of Subordinated Debt Obligations to the Trusts) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
American Equity Capital Trust II [Member]    
Subordinated Borrowing [Line Items]    
Interest rate 5.00%  
Subordinated borrowing, due date Jun. 01, 2047  
American Equity Capital Trust III [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.90%  
Subordinated borrowing, due date Apr. 29, 2034  
American Equity Capital Trust IV [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 4.00%  
Subordinated borrowing, due date Jan. 08, 2034  
American Equity Capital Trust VII [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.75%  
Subordinated borrowing, due date Dec. 14, 2034  
American Equity Capital Trust VIII [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.75%  
Subordinated borrowing, due date Dec. 15, 2034  
American Equity Capital Trust IX [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.65%  
Subordinated borrowing, due date Jun. 15, 2035  
American Equity Capital Trust X [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.65%  
Subordinated borrowing, due date Sep. 15, 2035  
American Equity Capital Trust XI [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.65%  
Subordinated borrowing, due date Dec. 15, 2035  
American Equity Capital Trust XII [Member]    
Subordinated Borrowing [Line Items]    
Description of variable rate basis [1] *LIBOR +  
Basis spread on variable rate 3.50%  
Subordinated borrowing, due date Apr. 07, 2036  
Subordinated Debentures [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross $ 246,671 $ 246,450
Unamortized debt issue costs (4,818) (4,998)
Subordinated debentures 241,853 241,452
Subordinated Debentures [Member] | American Equity Capital Trust II [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 77,061 76,840
Subordinated Debentures [Member] | American Equity Capital Trust III [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 27,840 27,840
Subordinated Debentures [Member] | American Equity Capital Trust IV [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 12,372 12,372
Subordinated Debentures [Member] | American Equity Capital Trust VII [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 10,830 10,830
Subordinated Debentures [Member] | American Equity Capital Trust VIII [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 20,620 20,620
Subordinated Debentures [Member] | American Equity Capital Trust IX [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 15,470 15,470
Subordinated Debentures [Member] | American Equity Capital Trust X [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 20,620 20,620
Subordinated Debentures [Member] | American Equity Capital Trust XI [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross 20,620 20,620
Subordinated Debentures [Member] | American Equity Capital Trust XII [Member]    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross $ 41,238 $ 41,238
[1] three month London Interbank Offered Rate