Policyholders' Liabilities - Liability for Future Policy Benefits, Revenue and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	$ 32,785	$ 32,201	$ 94,582	$ 91,667
Liability for Future Policy Benefit, Interest Expense	10,393	10,660	31,459	32,021
Home Service Insurance:
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	10,518	10,712	31,906	32,480
Liability for Future Policy Benefit, Interest Expense	3,043	2,985	9,102	8,934
Life Insurance, Permanent
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	29,882	27,930	84,864	76,047
Liability for Future Policy Benefit, Interest Expense	8,149	8,391	24,786	25,282
Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	4,184	3,395	12,806	11,067
Liability for Future Policy Benefit, Interest Expense	2,244	2,269	6,673	6,739
Life Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	1,826	2,508	5,124	7,550
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	3,280	1,828	8,764	3,559
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	32,612	32,005	94,030	91,105
Liability for Future Policy Benefit, Interest Expense	10,393	10,660	31,459	32,021
Life Insurance, Accident And Health, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	174	197	554	565
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	1	2	3
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	173	196	552	562
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	8,035	8,257	24,184	24,723
Liability for Future Policy Benefit, Interest Expense	1,371	1,349	4,108	4,040
Home Service Insurance, Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	1,881	1,837	5,774	5,905
Liability for Future Policy Benefit, Interest Expense	1,672	1,636	4,994	4,894
Home Service Insurance, Life Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	351	367	1,258	1,114
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	5	88	24
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	10,260	10,456	31,128	31,718
Liability for Future Policy Benefit, Interest Expense	3,043	2,985	9,102	8,934
Home Service Insurance, Accident And Health, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	258	256	778	762
Liability for Future Policy Benefit, Interest Expense	$ 0	$ 0	$ 0	$ 0