Unaudited Interim Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed Maturities, Available-for-sale, at fair value (AFS), allowance for credit loss	$ 1,438	$ 1,086
Fixed Maturities, Available-for-sale, amortized cost	8,888,296	8,556,236
Fixed maturities, trading, amortized cost	27,486	27,641
Equity securities, at fair value	225,363	323,289
Commercial mtg and other loans, allowance for credit losses	4,072	4,657
Other invested assets, at fair value	$ 380,895	$ 13,077
Common Stock, Par or Stated Value Per Share	$ 100	$ 100
Common Stock, Shares Authorized	25,000	25,000
Common Stock, Shares, Issued	25,000	25,000
Common Stock, Shares, Outstanding	25,000	25,000