Net Investment Gains (Losses) (Change in Unrealized Gains (Losses) of Available For Sales Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Realized and Unrealized Investment Gains Losses [Line Items]
Unrealized investment gains, before tax	$ (254,939)	$ 164,645	$ 261,970
Income tax benefit (expense)	56,127	(24,395)	(46,068)
Noncontrolling interests	(1)	(2)	103
Total change in unrealized gains and losses	(198,813)	140,248	216,005
Debt Securities
Realized and Unrealized Investment Gains Losses [Line Items]
Unrealized investment gains, before tax	(262,221)	134,129	271,825
Fixed maturity securities with allowance for expected credit losses
Realized and Unrealized Investment Gains Losses [Line Items]
Unrealized investment gains, before tax	10,124	32,004	369
Investment funds
Realized and Unrealized Investment Gains Losses [Line Items]
Unrealized investment gains, before tax	(1,270)	2,280	(2,299)
Other
Realized and Unrealized Investment Gains Losses [Line Items]
Unrealized investment gains, before tax	$ (1,572)	$ (3,768)	$ (7,925)