Investments (Accrued Investment Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Net Investment Income
Accrued investment income	$ 161,703	$ 160,027
Fixed maturities
Net Investment Income
Accrued investment income	137,177	117,216
Equity securities
Net Investment Income
Accrued investment income	236	2
Commercial mortgage and other loans
Net Investment Income
Accrued investment income	8,517	7,025
Policy loans
Net Investment Income
Accrued investment income	14,749	35,153
Other invested assets
Net Investment Income
Accrued investment income	50	254
Short-term investments and cash equivalents
Net Investment Income
Accrued investment income	$ 974	$ 377