Policyholders' Liabilities - Reconciliation to Liability for Future policy Benefits (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, by Product Segment [Line Items]
Net liability for future policy benefits	$ 1,189,427	$ 1,173,105
International Insurance, Permanent
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	669,183	676,211
Domestic Insurance, Life Insurance, Permanent
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	127,742	123,141
Permanent
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	796,925	799,352
International Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	145,735	143,652
Domestic Insurance, Life Insurance, Permanent Limited Pay
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	126,168	126,213
Permanent Limited Pay
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	271,903	269,865
International Insurance, Deferred Profit Liability
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	27,222	24,369
Domestic Insurance, Life Insurance, Deferred Profit Liability
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	38,917	36,265
Deferred Profit Liability
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	66,139	60,634
International Insurance, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	29,408	23,503
Domestic Insurance, Life Insurance, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	23,714	18,680
Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	53,122	42,183
International Insurance, Net of Reinsurance
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	871,548	867,735
Domestic Insurance, Life Insurance, Net of Reinsurance
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	316,541	304,299
Life Insurance Product Line [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Net liability for future policy benefits	1,188,089	1,172,034
International Insurance, Accident And Health, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	686	500
Domestic Insurance, Accident And Health, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	652	571
Accident and Health Insurance Product Line [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Net liability for future policy benefits	1,338	1,071
International Insurance And Accident And Health
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	872,234	868,235
Domestic Insurance, Life Insurance And Accident And Health
Liability for Future Policy Benefit, by Product Segment [Line Items]
Liability For Future Policy Benefit, Current Discount Rate, Before Reinsurance	$ 317,193	$ 304,870

Liability for Future Policy Benefit, by Product Segment [Line Items]