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Policyholders' Account Balance - Reconciliation to Policyholders' Account Balances To The Policyholders' Account Balances' Liability (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | --- | ---
Policyholder Account Balance [Line Items] |  |  |
Annuities | $ 127,485 | $ 121,422 | $ 114,923
Premiums paid in advance | 36,432 | $ 36,384 | 39,636
Supplemental Contracts Without Life Contingencies |  |  |
Policyholder Account Balance [Line Items] |  |  |
Annuities | 39,393 |  | 28,139
Fixed Annuity |  |  |
Policyholder Account Balance [Line Items] |  |  |
Annuities | 86,558 |  | 85,179
Unearned Revenue Reserve |  |  |
Policyholder Account Balance [Line Items] |  |  |
Annuities | 1,534 |  | 1,605
Premiums Paid In Advance |  |  |
Policyholder Account Balance [Line Items] |  |  |
Premiums paid in advance | 33,820 |  | 36,955
Other |  |  |
Policyholder Account Balance [Line Items] |  |  |
Premiums paid in advance | $ 2,612 |  | $ 2,681

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