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Policyholder Liabilities - Reconciliation of Policyholders’ Account Balances to the Policyholders’ Account Balances’ Liability (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Policyholder Account Balance [Line Items]      
Policyholder account balance $ 59,019,189 $ 58,781,836  
Embedded derivative adjustment (1,576,129) (1,996,640)  
Policy benefit reserves 319,895 318,677  
Deferred profit liability 19,341 19,084  
Fixed Index Annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balance 53,361,121 53,808,184 $ 55,001,391
Fixed Rate Annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balance 6,849,542 6,589,577 $ 6,860,060
Other      
Policyholder Account Balance [Line Items]      
Policyholder account balance $ 45,419 $ 42,954