Deferred Policy Acquisition Costs, Deferred Reinsurance Losses, Deferred Reinsurance Gains And Deferred Sales Inducements (Balance of and Changes in Deferred Reinsurance Gain) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance, beginning of period	$ 1,673,291	$ 1,492,856	$ 252,736
Amortization	(151,767)	(96,864)	(86,389)
Other	1,797,261	277,299	1,326,509
Balance, end of period	3,318,785	1,673,291	1,492,856
Lotus Re
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Other			1,352,000
Fixed Annuities
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance, beginning of period	48,074	57,898	78,138
Amortization	(10,516)	(9,790)	(6,437)
Other	(10)	(34)	(13,803)
Balance, end of period	37,548	48,074	57,898
Variable Annuties
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance, beginning of period	261,721	0	0
Amortization	(20,061)	(15,612)	0
Other	(32)	277,333	0
Balance, end of period	241,628	261,721	0
Variable / Universal Life
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Balance, beginning of period	1,363,496	1,434,958	174,598
Amortization	(121,190)	(71,462)	(79,952)
Other	1,797,303	0	1,340,312
Balance, end of period	3,039,609	$ 1,363,496	$ 1,434,958
Variable / Universal Life | Somerset Re
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Other	1,207,000
Variable / Universal Life | PURC
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Other	116,000
Variable / Universal Life | Wilton Re
Reinsurance Recoverable, Allowance for Credit Gain [Roll Forward]
Other	$ 798,000