Policyholders' Liabilities - Liability for Future Policy Benefits, Revenue and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	$ 31,605	$ 28,773	$ 59,466	$ 54,980
Liability for Future Policy Benefit, Interest Expense	10,634	10,699	21,361	21,605
Home Service Insurance:
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	10,954	11,066	21,768	22,151
Liability for Future Policy Benefit, Interest Expense	2,979	2,914	5,949	5,824
Life Insurance, Permanent
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	24,801	22,507	48,117	44,965
Liability for Future Policy Benefit, Interest Expense	8,427	8,532	16,891	17,102
Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	4,026	3,610	7,672	7,778
Liability for Future Policy Benefit, Interest Expense	2,207	2,167	4,470	4,503
Life Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	3,933	2,738	5,042	2,815
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Life Insurance, Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Reinsurance	1,358	412	1,731	1,060
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Life Insurance, Net of Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	31,402	28,443	59,100	54,498
Liability for Future Policy Benefit, Interest Expense	10,634	10,699	21,361	21,605
Life Insurance, Accident And Health, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	204	332	368	484
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Life Insurance, Accident And Health, Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Reinsurance	1	2	2	2
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Life Insurance, Accident And Health, Net Of Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	203	330	366	482
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Home Service Insurance, Life Insurance, Permanent
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	8,225	8,268	16,466	16,640
Liability for Future Policy Benefit, Interest Expense	1,347	1,322	2,691	2,646
Home Service Insurance, Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	2,028	2,117	4,068	4,271
Liability for Future Policy Benefit, Interest Expense	1,632	1,592	3,258	3,178
Home Service Insurance, Life Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	453	466	747	834
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Home Service Insurance, Life Insurance, Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Reinsurance	7	2	19	17
Liability for Future Policy Benefit, Interest Expense	0	0	0	0
Home Service Insurance, Life Insurance, Net of Reinsurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	10,699	10,849	21,262	21,728
Liability for Future Policy Benefit, Interest Expense	2,979	2,914	5,949	5,824
Home Service Insurance, Accident And Health, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	255	217	506	423
Liability for Future Policy Benefit, Interest Expense	$ 0	$ 0	$ 0	$ 0