Separate Accounts - Schedule of Balances of and Changes in Separate Account Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Separate Accounts Disclosure [Abstract]
Separate Account, Liability, Beginning Balance	$ 2,305,717	$ 2,799,992
Premiums and deposits	186,631	253,982
Surrenders and withdrawals	(343,473)	(293,278)
Investment performance	245,565	(202,997)
Management fees and other charges	(62,159)	(62,281)
Foreign exchange translation	63,561	(189,701)
Separate Account, Liability, Ending Balance	2,395,842	2,305,717
Cash surrender value	$ 2,354,813	$ 2,268,436