Investments (Accrued Investment Income) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Net Investment Income
Accrued investment income	$ 138,781	$ 160,027
Fixed maturities
Net Investment Income
Accrued investment income	115,731	117,216
Equity securities
Net Investment Income
Accrued investment income	163	2
Commercial mortgage and other loans
Net Investment Income
Accrued investment income	7,954	7,025
Policy loans
Net Investment Income
Accrued investment income	14,456	35,153
Other invested assets
Net Investment Income
Accrued investment income	262	254
Short-term investments and cash equivalents
Net Investment Income
Accrued investment income	$ 215	$ 377