Separate Accounts - Schedule of Fair Value of Separate Accounts by Major Category of Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Separate accounts assets	$ 2,305,717	$ 2,799,992
Fixed Income Securities [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Separate accounts assets	796,384	1,172,425
Equity Securities [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Separate accounts assets	1,340,541	1,534,993
Cash and Cash Equivalents [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Separate accounts assets	181,162	92,648
Due To/From Funds [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Separate accounts assets	(12,399)	(112)
Other [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Separate accounts assets	$ 29	$ 38