Policy Liabilities - Schedule of Policyholder Account Balance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Interest Sensitive Life
Policyholder Account Balance [Roll Forward]
Beginning Balance	$ 723,389	$ 732,948	$ 739,105
Issuances	0	0	0
Premiums and deposits received	19,653	20,928	22,036
Policy charges	(11,730)	(12,295)	(12,926)
Surrenders and withdrawals	(23,007)	(22,479)	(21,215)
Benefit payments	(30,565)	(30,512)	(29,909)
Interest credited	27,344	27,790	28,320
Other	6,603	7,009	7,537
Ending Balance	$ 711,687	$ 723,389	$ 732,948
Weighted-average credit rate	3.81%	3.82%	3.85%
Net amount at risk	$ 1,560,633	$ 1,663,496	$ 1,766,170
Cash surrender value	667,217	677,111	671,596
Deferred Annuity
Policyholder Account Balance [Roll Forward]
Beginning Balance	656,573	773,039	954,318
Issuances	1,040	875	896
Premiums and deposits received	12,584	11,332	13,209
Policy charges	0	0	0
Surrenders and withdrawals	(64,145)	(107,707)	(165,584)
Benefit payments	(46,070)	(43,955)	(57,937)
Interest credited	20,589	23,634	28,150
Other	98	(645)	(13)
Ending Balance	$ 580,669	$ 656,573	$ 773,039
Weighted-average credit rate	3.33%	3.31%	3.26%
Cash surrender value	$ 580,669	$ 656,573	$ 773,039
Amount reinsured with third-party reinsurers under existing reinsurance agreements	400,000	449,000
Other Policy-holders' Funds
Policyholder Account Balance [Roll Forward]
Beginning Balance	468,604	236,958	123,236
Issuances	0	0	0
Premiums and deposits received	191,812	240,802	122,136
Policy charges	0	0	0
Surrenders and withdrawals	(132,566)	(13,897)	(13,042)
Benefit payments	0	0	0
Interest credited	22,617	21,165	9,314
Other	(18,420)	(16,424)	(4,686)
Ending Balance	$ 532,047	$ 468,604	$ 236,958
Weighted-average credit rate	4.52%	6.00%	5.17%
Cash surrender value	$ 532,047	$ 468,604	$ 236,958