Policy Liabilities - Schedule of Policyholder Account Balance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Interest Sensitive Life
Policyholder Account Balance [Roll Forward]
Beginning Balance	$ 723,389	$ 732,948
Issuances	0	0
Premiums and deposits received	5,250	5,624
Policy charges	(2,986)	(3,111)
Surrenders and withdrawals	(5,966)	(6,309)
Benefit payments	(8,329)	(9,140)
Interest credited	6,875	7,016
Other	2,036	2,693
Ending Balance	$ 720,269	$ 729,721
Weighted-average credit rate	3.86%	3.89%
Net amount at risk	$ 1,636,687	$ 1,740,325
Cash surrender value	674,838	669,721
Deferred Annuity
Policyholder Account Balance [Roll Forward]
Beginning Balance	656,573	773,039
Issuances	171	198
Premiums and deposits received	3,766	3,573
Policy charges	0	0
Surrenders and withdrawals	(16,531)	(31,563)
Benefit payments	(12,831)	(12,771)
Interest credited	5,373	6,243
Other	(302)	300
Ending Balance	$ 636,219	$ 739,019
Weighted-average credit rate	3.37%	3.34%
Cash surrender value	$ 636,138	$ 739,019
Amount reinsured with third-party reinsurers under existing reinsurance agreements		439,000
Other Policy-holders' Funds
Policyholder Account Balance [Roll Forward]
Beginning Balance	468,604	236,958
Issuances	0	0
Premiums and deposits received	86,885	166,700
Policy charges	0	0
Surrenders and withdrawals	(93,128)	(3,517)
Benefit payments	0	0
Interest credited	5,443	3,521
Other	(4,656)	(2,393)
Ending Balance	$ 463,148	$ 401,269
Weighted-average credit rate	4.76%	4.49%
Cash surrender value	$ 463,148	$ 401,269