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Subordinated Debentures (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
American Equity Capital Trust I [Member]
Dec. 31, 2013
American Equity Capital Trust II [Member]
Subordinated Borrowing [Line Items]    
Interest rate, stated percentage 8.00% 5.00%
Trust preferred securities, mandatory redemption, principal amount converted $ 20.6  
Trust preferred securities, mandatory redemption, number of shares converted 688,327  
Common stock issued during period, mandatory redemption, number of shares issued 2,549,333  
Trust preferred securities, mandatory redemption, number of shares settled in cash 38,001  
Payments to acquire trust preferred securities 1.1  
Trust preferred securities, remaining shares to be settled in cash 6,000  
Trust preferred securities, cash payments to settle remaining shares 0.2  
Trust preferred securities, number of shares converted 4,000  
Common stock issued during period, number of shares issued 14,814  
Subordinated debentures, principal amount   100.0
Subordinated debentures, fair value at issuance   $ 74.7
Interest rate, effective percentage   6.80%
Ownership percentage, Iowa Farm Bureau Federation   50.00%