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Subordinated Debentures (Summary of Subordinated Debt Obligations to the Trusts) (Details) - American Equity Capital Trust II - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Subordinated Borrowing [Line Items]    
Debt instrument, face amount $ 100,000  
Subordinated debentures, fair value at issuance $ 74,700  
Interest rate, effective percentage 6.80%  
Ownership percentage, Iowa Farm Bureau Federation 50.00%  
Subordinated Debentures    
Subordinated Borrowing [Line Items]    
Subordinated debentures, gross $ 78,421 $ 78,112
Interest rate 5.00%