Investments (Net Realized Gains (Losses) on Invesments) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Gain (Loss) on Securities [Line Items]
Decrease (increase) in allowance for credit losses	$ (3,348)	$ 1,933	$ (8,593)	$ 4,448
Net realized losses on investments	(33,272)	(3,114)	(46,399)	(7,697)
Fixed Maturity Securities, Available For Sale
Gain (Loss) on Securities [Line Items]
Gross realized gains	507	4,062	3,972	6,429
Gross realized losses	(24,053)	(7,951)	(26,059)	(16,147)
Net credit loss (provision) release	(5,498)	1,260	(12,854)	(177)
Realized losses	(29,044)	(2,629)	(34,941)	(9,895)
Mortgage Loans on Real Estate
Gain (Loss) on Securities [Line Items]
Decrease (increase) in allowance for credit losses	(3,348)	1,933	(8,593)	4,448
Recovery of specific allowance	229	0	229	0
Loss on sale of mortgage loans	(1,109)	(2,418)	(3,094)	(2,250)
Gain (loss) on mortgage loans	$ (4,228)	$ (485)	$ (11,458)	$ 2,198

Debt Securities, Available-for-sale, Net Credit Loss

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Gain (Loss) on Mortgage Loans

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Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

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Amount of realized and unrealized gain (loss) on investment.

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Reflects the net positive or negative amount derived from subtracting from net proceeds of sale and the carrying amounts, net of allocated reserves, of financial assets transferred to third parties in transactions that qualify for sales treatment.

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