Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in DAC) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	$ 7,144,736	[1]	$ 6,956,197		$ 7,029,308
Capitalization	1,533,858		1,121,435		989,342
Amortization Expense	(603,357)		(539,510)		(521,269)
Other	(268,177)		(393,386)		(541,184)
Balance, end of period	7,807,060		7,144,736	[1]	6,956,197
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	197,937		102,251		84,481
Capitalization	216,410		117,851		31,494
Amortization Expense	(42,705)		(22,165)		(13,724)
Other	0		0		0
Balance, end of period	371,642		197,937		102,251
Variable Annuties
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	3,298,935		3,759,819		3,806,732
Capitalization	430,520		263,869		296,597
Amortization Expense	(356,254)		(331,368)		(343,510)
Other	0		(393,385)		0
Balance, end of period	3,373,201		3,298,935		3,759,819
Term Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	743,888		648,837		577,084
Capitalization	183,463		159,000		127,541
Amortization Expense	(63,447)		(63,949)		(55,423)
Other	(249,836)		0		(365)
Balance, end of period	614,068		743,888		648,837
Variable / Universal Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	2,903,976		2,445,290		2,561,011
Capitalization	703,465		580,715		533,710
Amortization Expense	(140,951)		(122,028)		(108,612)
Other	(18,341)		(1)		(540,819)
Balance, end of period	$ 3,448,149		$ 2,903,976		$ 2,445,290

[1] Amounts reflect revision to prior period Financial Statements. See Note 17 for additional information.