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Policyholders' Liabilities - Policyholders' Account Balance Reconciliation to Policyholders' Account Balances' Liability (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Policyholder Account Balance [Line Items]
Annuities	$ 168,396	$ 149,977	$ 145,838
Premiums paid in advance	30,628	$ 31,182	32,420
Supplemental Contracts Without Life Contingencies
Policyholder Account Balance [Line Items]
Annuities	79,947		57,030
Fixed Annuity
Policyholder Account Balance [Line Items]
Annuities	86,969		87,327
Unearned Revenue Reserve
Policyholder Account Balance [Line Items]
Annuities	1,480		1,481
Premiums Paid In Advance
Policyholder Account Balance [Line Items]
Premiums paid in advance	28,558		30,600
Other
Policyholder Account Balance [Line Items]
Premiums paid in advance	$ 2,070		$ 1,820

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of liability due to policyholder for deposit held under long-duration contract issued by insurance entity.

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Carrying amount of premiums written on insurance contracts that have not been earned as of the balance sheet date.

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