Policyholders' Liabilities - Reconciliation to Liability for Future policy Benefits (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	$ 1,211,320	$ 1,198,647	$ 1,263,346
Accident and health	926	767
Total future policy benefit reserves, Life and Disability and Accident Benefits	1,212,246	$ 1,199,414	1,264,091
Life Insurance, Permanent
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	719,583		747,749
Home Service Insurance, Life Insurance, Permanent
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	109,389		117,155
Permanent
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	828,972		864,904
Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	183,392		197,133
Home Service Insurance, Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	105,046		112,599
Permanent Limited Pay
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	288,438		309,732
Life Insurance, Deferred Profit Liability
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	26,602		23,379
Home Service Insurance, Life Insurance, Deferred Profit Liability
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	25,667		23,394
Deferred Profit Liability
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	52,269		46,773
Life Insurance, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	27,781		28,286
Home Service Insurance, Life Insurance, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	13,860		13,651
Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	41,641		41,937
Life Insurance, Net of Reinsurance
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	957,358		996,547
Home Service Insurance, Life Insurance, Net of Reinsurance
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life insurance	253,962		266,799
Life Insurance, Accident And Health, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Accident and health	662		502
Home Service Insurance, Accident And Health, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Accident and health	264		243
Accident And Health, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Accident and health	926		745
Life Insurance And Accident And Health
Liability for Future Policy Benefit, by Product Segment [Line Items]
Total future policy benefit reserves, Life and Disability and Accident Benefits	958,020		997,049
Home Service Insurance, Life Insurance And Home Service Insurance, Accident And Health
Liability for Future Policy Benefit, by Product Segment [Line Items]
Total future policy benefit reserves, Life and Disability and Accident Benefits	$ 254,226		$ 267,042