Deferred Policy Acquisition Costs, Deferred Reinsurance, and Deferred Sales Inducements (DAC) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	$ 7,807,060	$ 7,144,736
Capitalization	358,789	342,130
Amortization expense	(160,223)	129,157	[1]
Amortization expense		(147,664)
Other	(1,165)	(38,017)
Balance, end of period	8,004,461	7,301,185
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	371,642	197,937
Capitalization	42,749	64,744
Amortization expense	(13,216)
Amortization expense		(8,725)
Other	(1,236)	0
Balance, end of period	399,939	253,956
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	3,373,201	3,298,935
Capitalization	116,925	87,337
Amortization expense	(96,183)
Amortization expense		(86,116)
Other	0	0
Balance, end of period	3,393,943	3,300,156
Term Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	614,068	743,888
Capitalization	43,182	43,874
Amortization expense	(11,901)
Amortization expense		(18,180)
Other	0	0
Balance, end of period	645,349	769,582
Variable/Universal Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	3,448,149	2,903,976
Capitalization	155,933	146,175
Amortization expense	(38,923)
Amortization expense		(34,643)
Other	71	(38,017)
Balance, end of period	$ 3,565,230	$ 2,977,491

[1] Amounts reflect revision to prior period Financial Statements. See Note 16 for additional information.