Investment (Accrued Investments Income) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net Investment Income
Accrued investment income	$ 61,117	$ 121,604
Fixed maturities
Net Investment Income
Accrued investment income	57,757	116,342
Equity securities
Net Investment Income
Accrued investment income	0	1
Commercial mortgage and other loans
Net Investment Income
Accrued investment income	3,252	4,828
Policy loans
Net Investment Income
Accrued investment income	13	11
Short-term investments and cash equivalents
Net Investment Income
Accrued investment income	95	158
Other
Net Investment Income
Accrued investment income	$ 0	$ 264