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Reinsurance and Policy Provisions (EquiTrust Coinsurance Agreements) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
coinsurance_agreement
Dec. 31, 2021
USD ($)
Ceded Credit Risk [Line Items]    
Coinsurance deposits (net of allowance for credit losses of $8,737 as of 2022 and $2,264 as of 2021) $ 13,208,399 $ 8,850,608
EquiTrust Coinsurance Agreements, All Periods    
Ceded Credit Risk [Line Items]    
Number of coinsurance agreements | coinsurance_agreement 2  
Coinsurance deposits (net of allowance for credit losses of $8,737 as of 2022 and $2,264 as of 2021) $ 323,700 381,400
Reinsurance recoverable $ 800  
Reinsurance payable   $ 7,800
EquiTrust Coinsurance Agreement, August 1, 2001 to December 31, 2001    
Ceded Credit Risk [Line Items]    
Coninsurance on certain annuities, percentage 70.00%  
EquiTrust Coinsurance Agreement, January 1, 2002 to December 31, 2003    
Ceded Credit Risk [Line Items]    
Coninsurance on certain annuities, percentage 40.00%  
EquiTrust Coinsurance Agreement, January 1, 2004 to July 31, 2004    
Ceded Credit Risk [Line Items]    
Coninsurance on certain annuities, percentage 20.00%