Policyholders' Liabilities - Policyholder Account Balance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Policyholder Account Balance [Line Items]
Balance, beginning of year	$ 207,702
Balance, end of year	226,159	$ 207,702
Supplemental Contracts Without Life Contingencies
Policyholder Account Balance [Line Items]
Balance, beginning of year	44,569	32,995
Policyholder Account Balance, Issuance	24,241	22,387
Policyholder Account Balance, Premium Received	438	123
Policyholder Account Balance, Interest Credited	2,031	1,483
Policyholder Account Balance, Increase (Decrease) from Other Change	5	1
Policyholder Account Balance, Surrender and Withdrawal	0	0
Policyholder Account Balance, Benefit Payment	10,870	12,420
Balance, end of year	$ 60,414	$ 44,569
Policyholder Account Balance, Weighted Average Crediting Rate	4.01%	4.00%
Policyholder Account Balance, Cash Surrender Value	$ 60,414	$ 44,569
Fixed Annuity
Policyholder Account Balance [Line Items]
Balance, beginning of year	87,134	86,807
Policyholder Account Balance, Issuance	3,263	2,741
Policyholder Account Balance, Premium Received	4,201	4,387
Policyholder Account Balance, Interest Credited	2,790	2,653
Policyholder Account Balance, Increase (Decrease) from Other Change	0	0
Policyholder Account Balance, Surrender and Withdrawal	9,308	9,454
Policyholder Account Balance, Benefit Payment	0	0
Balance, end of year	$ 88,080	$ 87,134
Policyholder Account Balance, Weighted Average Crediting Rate	3.73%	3.56%
Policyholder Account Balance, Cash Surrender Value	$ 88,080	$ 87,134
Dividend Accumulations
Policyholder Account Balance [Line Items]
Balance, beginning of year	44,960	41,663
Policyholder Account Balance, Issuance	779	660
Policyholder Account Balance, Premium Received	5,703	5,860
Policyholder Account Balance, Interest Credited	1,827	1,364
Policyholder Account Balance, Increase (Decrease) from Other Change	0	0
Policyholder Account Balance, Surrender and Withdrawal	5,501	4,587
Policyholder Account Balance, Benefit Payment	0	0
Balance, end of year	$ 47,768	$ 44,960
Policyholder Account Balance, Weighted Average Crediting Rate	3.58%	3.04%
Policyholder Account Balance, Cash Surrender Value	$ 47,768	$ 44,960
Premiums Paid In Advance
Policyholder Account Balance [Line Items]
Balance, beginning of year	31,039	34,603
Policyholder Account Balance, Issuance	5,820	3,693
Policyholder Account Balance, Premium Received	778	793
Policyholder Account Balance, Interest Credited	800	1,627
Policyholder Account Balance, Increase (Decrease) from Other Change	0	0
Policyholder Account Balance, Surrender and Withdrawal	8,540	9,677
Policyholder Account Balance, Benefit Payment	0	0
Balance, end of year	$ 29,897	$ 31,039
Policyholder Account Balance, Weighted Average Crediting Rate	3.02%	2.95%
Policyholder Account Balance, Cash Surrender Value	$ 29,897	$ 31,039