Reinsurance (Balance Sheet Reinsurance Results) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effects of Reinsurance [Line Items]
Reinsurance recoverables	$ 8,108,267	$ 694,040
Deferred policy acquisition costs	567,191	4,237,780	$ 4,455,683	$ 4,447,505
Deferred sales inducements	295,097	714,598	812,724	889,598
Value of business acquired	(27,568)	(27,247)	$ (30,025)	$ (33,222)
Other assets	2,717,405	767,540
Policyholders’ account balances	11,749,651	9,181,459
Reinsurance payable	7,182,652	178,860
Other Liabilities	942,223	980,692
Impacts of Reinsurance
Effects of Reinsurance [Line Items]
Reinsurance recoverables	8,108,267	694,040
Deferred policy acquisition costs	(530,095)	3,414,620
Deferred sales inducements	(26,080)	374,631
Value of business acquired	(2,047)	(2,124)
Other assets	53,622	61,471
Policyholders’ account balances	0	3,273,863
Future policy benefits	0	12,610,942
Reinsurance payable	7,182,652	178,860
Other Liabilities	824,387	262,462
Unaffiliated activity
Effects of Reinsurance [Line Items]
Reinsurance payable	$ 0	$ 2,300