Future Policy Benefits - Schedule of Reconcile LFPB (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits	$ 6,561,624	$ 6,297,906
Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits	6,348,936	6,089,867
Other
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits	212,688	208,039
Term Life and Other
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits	$ 6,561,624	$ 6,297,906