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Policyholder Liabilities (Schedule of Reconciliation of Reinsurance Market Risk Benefits by Assets and Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Market Risk Benefit [Line Items] |  |
Asset | $ 711,413 | $ 640,681
Liability | 133,121 | 36,066
Net asset | 578,292 | 604,615
Fixed Index Annuities |  |
Market Risk Benefit [Line Items] |  |
Asset | 695,387 | 629,611
Liability | 132,871 | 35,652
Net asset | 562,516 | 593,959
Fixed Rate Annuities |  |
Market Risk Benefit [Line Items] |  |
Asset | 16,026 | 11,070
Liability | 250 | 414
Net asset | $ 15,776 | $ 10,656

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