Liability For Future Policy Benefits (Deferred Profit Liability) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance, end of period	$ 20,869,105	$ 19,991,100
Deferred profit liability
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue	3,691	(867)
Fixed Annuities
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Effect of actual variances from expected experience and other activity			$ 4,195	$ 351
Adjusted balance, beginning of period			233,798	220,712
Interest accrual	4,201	3,809
Other adjustments	(33)	(285)
Balance, end of period	220,094	211,198
Reinsurance recoverable	17,835	16,488
Balance after reinsurance recoverable, end of period, post-flooring	202,259	194,710
Fixed Annuities | Gross Basis
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Revenue	24,200	19,545
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 and other activity			(5,092)	(607)
Adjusted balance, beginning of period			$ 13,101	$ 15,158
Profits deferred	2,088	2,173
Interest accrual	294	276
Amortization	(973)	(950)
Other adjustments	(8)	(25)
Balance, end of period	14,502	16,632
Reinsurance recoverable	1,558	1,722
Balance after reinsurance recoverable, end of period, post-flooring	12,944	14,910
Revenue	3,691	(867)
Fixed Annuities | Deferred profit liability | Gross Basis
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Interest accrual	294	276
Revenue	$ 3,691	$ (867)