Liability For Future Policy Benefits (Deferred Profit Liability) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Other adjustments	$ 4,402	$ 2,847
Balance, end of period	7,428,204	7,845,870
Reinsurance recoverable	6,736,430	7,119,743
Balance after reinsurance recoverable, end of period, post-flooring	691,774	726,127
Deferred profit liability
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue	(539)	(445)
Deferred profit liability | Gross Basis [Member]
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Interest accrual	182	131
Revenue	(539)	(445)
Fixed Annuities
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Effect of actual variances from expected experience			$ 1,427	$ 1,276
Adjusted balance, beginning of period			231,030	221,637
Interest accrual	2,137	1,878
Other adjustments	(41)	(285)
Balance, end of period	215,482	224,169
Reinsurance recoverable	17,336	17,807
Balance after reinsurance recoverable, end of period, post-flooring	198,146	206,362
Fixed Annuities | Gross Basis [Member]
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Interest accrual	2,137	1,878
Fixed Annuities | Deferred profit liability
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance, beginning of period	18,193	15,765
Effect of actual variances from expected experience			(951)	(1,083)
Adjusted balance, beginning of period			$ 17,242	$ 14,682
Profits deferred	1,856	1,889
Interest accrual	182	131
Amortization	(541)	(466)
Other adjustments	(8)	(25)
Balance, end of period	18,731	16,211
Reinsurance recoverable	1,545	1,829
Balance after reinsurance recoverable, end of period, post-flooring	17,186	14,382
Revenue	$ (539)	$ (445)