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Investments (Net Realized Gains (Losses) on Invesments) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gain (Loss) on Securities [Line Items]
Decrease (increase) in allowance for credit losses		$ 7,005	$ (15,447)
Recovery of specific allowance		0	712
Net realized gains (losses) on investments		(13,242)	(80,680)	$ 6,962
Available For Sale Fixed Maturity Securities
Gain (Loss) on Securities [Line Items]
Gross realized gains		10,167	305,170	21,449
Gross realized losses		(19,140)	(276,847)
Gross realized losses				(6,397)
Net credit loss (provision) release (1)	[1]	(6,241)	(94,560)	0
Realized gains (losses)		(15,214)	(66,237)
Realized gains (losses)				15,052
Other Investments
Gain (Loss) on Securities [Line Items]
Gross realized gains		0	0	7,296
Gross realized losses		0	0	(14,446)
Realized gains (losses)		0	0	(7,150)
Mortgage Loans on Real Estate
Gain (Loss) on Securities [Line Items]
Decrease (increase) in allowance for credit losses		7,005	(15,447)	(940)
Recovery of specific allowance		0	712	0
Gain (loss) on sale of mortgage loans		(5,033)	292	0
Gain (loss) on mortgage loans		$ 1,972	$ (14,443)	$ (940)
[1] Prior to adopting authoritative guidance effective January 1, 2020, credit losses on available for sale fixed maturity securities were classified as other than temporary impairments and reported in a separate line item in the Consolidated Statements of Operations. We recognized $18.7 million of other than temporary impairments during the year ended December 31, 2019.

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