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Policyholders' Liabilities - Policyholders' Account Balance Reconciliation to Policyholders' Account Balances' Liability (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024
--- | --- | --- | ---
Policyholder Account Balance [Line Items] |  |  |
Annuities | $ 158,652 | $ 149,977 | $ 141,603
Premiums paid in advance | 31,063 | $ 31,182 | 32,737
Supplemental Contracts Without Life Contingencies |  |  |
Policyholder Account Balance [Line Items] |  |  |
Annuities | 71,355 |  | 53,332
Fixed Annuity |  |  |
Policyholder Account Balance [Line Items] |  |  |
Annuities | 85,811 |  | 86,792
Unearned Revenue Reserve |  |  |
Policyholder Account Balance [Line Items] |  |  |
Annuities | 1,486 |  | 1,479
Premiums Paid In Advance |  |  |
Policyholder Account Balance [Line Items] |  |  |
Premiums paid in advance | 28,915 |  | 30,627
Other |  |  |
Policyholder Account Balance [Line Items] |  |  |
Premiums paid in advance | $ 2,148 |  | $ 2,110

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