Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in DAC) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	$ 7,097,511	$ 6,930,425
Capitalization	697,742	513,893
Amortization expense	(293,816)	(266,642)
Other	(18,604)	(393,385)
Balance, end of period	7,482,833	6,784,291
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	197,937	102,251
Capitalization	120,883	48,552
Amortization expense	(18,538)	(9,490)
Other	0	0
Balance, end of period	300,282	141,313
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	3,257,761	3,736,454
Capitalization	175,313	117,342
Amortization expense	(170,567)	(166,332)
Other	0	(393,385)
Balance, end of period	3,262,507	3,294,079
Term Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	743,888	648,837
Capitalization	90,283	72,216
Amortization expense	(36,597)	(31,084)
Other	(97)	0
Balance, end of period	797,477	689,969
Variable/Universal Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost, Beginning Balance	2,897,925	2,442,883
Capitalization	311,263	275,783
Amortization expense	(68,114)	(59,736)
Other	(18,507)	0
Balance, end of period	$ 3,122,567	$ 2,658,930