Schedule IV - Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct premiums, life insurance in force	$ 919,081,738	$ 905,819,671	$ 861,392,223
Direct premiums	3,230,120	3,122,148	2,907,149
Ceded premiums, life insurance in force	787,907,229	777,826,233	742,356,917
Ceded premiums	1,629,892	1,616,264	1,580,766
Net life insurance in-force	131,174,509	127,993,438	119,035,306
Premiums earned, net	1,600,228	1,505,884	1,326,383
Life Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct premiums	3,229,229	3,121,167	2,906,083
Ceded premiums	1,629,634	1,615,966	1,580,427
Premiums earned, net	1,599,595	1,505,201	1,325,656
Accident and Health Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct premiums	891	981	1,066
Ceded premiums	258	298	339
Premiums earned, net	$ 633	$ 683	$ 727