Policy Liabilities - Schedule of Policyholder Account Balance, Guaranteed Minimum Crediting Rate (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
51-150 basis points above | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range above guaranteed minimum crediting rates	0.0051	0.0051	0.0051
51-150 basis points above | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range above guaranteed minimum crediting rates	0.0150	0.0150	0.0150
Interest Sensitive Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 711,687	$ 723,389	$ 732,948	$ 739,105
Interest Sensitive Life | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	711,687	723,389	732,948
Interest Sensitive Life | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0
Interest Sensitive Life | Less than 3.00% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3.00%	3.00%	3.00%
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0
Interest Sensitive Life | Less than 3.00% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3.00%	3.00%	3.00%
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0
Interest Sensitive Life | 3.00%-3.99% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 29,355	$ 29,251	$ 29,086
Interest Sensitive Life | 3.00%-3.99% | At guaranteed minimum | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3.00%	3.00%	3.00%
Interest Sensitive Life | 3.00%-3.99% | At guaranteed minimum | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3.99%	3.99%	3.99%
Interest Sensitive Life | 3.00%-3.99% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0
Interest Sensitive Life | 3.00%-3.99% | 51-150 basis points above | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3.00%	3.00%	3.00%
Interest Sensitive Life | 3.00%-3.99% | 51-150 basis points above | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3.99%	3.99%	3.99%
Interest Sensitive Life | 4.00%-4.99% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 592,935	$ 604,412	$ 613,704
Interest Sensitive Life | 4.00%-4.99% | At guaranteed minimum | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	4.00%	4.00%	4.00%
Interest Sensitive Life | 4.00%-4.99% | At guaranteed minimum | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	4.99%	4.99%	4.99%
Interest Sensitive Life | 4.00%-4.99% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0
Interest Sensitive Life | 4.00%-4.99% | 51-150 basis points above | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	4.00%	4.00%	4.00%
Interest Sensitive Life | 4.00%-4.99% | 51-150 basis points above | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	4.99%	4.99%	4.99%
Interest Sensitive Life | Greater than 5.00% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	5.00%	5.00%	5.00%
Range of guaranteed minimum crediting rates	$ 89,397	$ 89,726	$ 90,158
Interest Sensitive Life | Greater than 5.00% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	5.00%	5.00%	5.00%
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0
Deferred Annuity
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	580,669	656,573	773,039	954,318
Amount reinsured with third-party reinsurers under existing reinsurance agreements	400,000	449,000
Deferred Annuity | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	580,669	656,573	773,039
Deferred Annuity | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Deferred Annuity | Less than 3.00% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	2,115	1,812	1,945
Deferred Annuity | Less than 3.00% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Deferred Annuity | 3.00%-3.99% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	406,105	473,191	574,939
Deferred Annuity | 3.00%-3.99% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Deferred Annuity | 4.00%-4.99% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	172,449	181,570	195,390
Deferred Annuity | 4.00%-4.99% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Deferred Annuity | Greater than 5.00% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	765
Deferred Annuity | Greater than 5.00% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Other Policy-holders' Funds
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	532,047	468,604	236,958	$ 123,236
Other Policy-holders' Funds | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	532,047	468,604	186,891
Other Policy-holders' Funds | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	50,067
Other Policy-holders' Funds | Less than 3.00% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	438,586	373,584	138,684
Other Policy-holders' Funds | Less than 3.00% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Other Policy-holders' Funds | 3.00%-3.99% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	3,128	3,182	3,790
Other Policy-holders' Funds | 3.00%-3.99% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	0
Other Policy-holders' Funds | 4.00%-4.99% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	55,299	55,876	6,861
Other Policy-holders' Funds | 4.00%-4.99% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	0	0	50,067
Other Policy-holders' Funds | Greater than 5.00% | At guaranteed minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	35,034	35,962	37,556
Other Policy-holders' Funds | Greater than 5.00% | 51-150 basis points above
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Range of guaranteed minimum crediting rates	$ 0	$ 0	$ 0