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Reinsurance - Reinsurance Recoverables Estimated by Reinsurer and Financial Strength Ratings of Reinsurer (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables |  | $ 2,596,597 | $ 2,744,165
Swiss Re Life & Health America Inc. (Novated from Pecan Re, Inc.) [Member] | AM Best, A+ Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables | [1] | 2,018,854 | 2,074,945
Munich Re of Malta [Member] | External credit rating, not rated [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables | [1],[2] | 204,235 | 210,822
American Health and Life Insurance Company [Member] | AM Best, B++ Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables | [1] | 123,491 | 127,601
SCOR Global Life Reinsurance Companies [Member] | AM Best, A Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables | [3] | 118,229 | 148,899
Swiss Re Life & Health America Inc. [Member] | AM Best, A+ Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables | [4] | 41,189 | 43,826
RGA Reinsurance Company [Member] | AM Best, A+ Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables |  | 36,351 | 44,132
Korean Reinsurance Company [Member] | AM Best, A Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables |  | 30,190 | 40,781
Munich American Reassurance Company [Member] | AM Best, A+ Rating [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables |  | 21,630 | 36,487
All Other Reinsurers [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables |  | 3,566 | 17,887
Allowance for Credit Losses [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables |  | $ (1,138) | $ (1,215)
[1] | Reinsurance recoverables include balances ceded under coinsurance transactions of term life insurance policies that were in-force as of December 31, 2009. Amounts shown are net of their share of the reinsurance recoverable from other reinsurers. Arrangements with these reinsurers include collateral trust agreements held in support of reinsurance recoverables.
[2] | Entit y is rated AA by S&P as of September 30, 2025.
[3] | Includes amounts ceded to Transamerica Reinsurance Companies and fully retroceded to SCOR Global Life Reinsurance Companies.
[4] | Includes amounts ceded to Lincoln National Life Insurance and fully retroceded to Swiss Re Life & Health America Inc.

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