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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Amortized cost | $ 554,775 | $ 558,544
Common stock, par value (in usd per share) | $ 1 | $ 1
Treasury stock (in shares) | 352,161 | 352,161
Common stock, shares outstanding (in shares) | 30,424,694 | 30,223,311
Common Stock, Shares, Issued, Not Disclosed | true |
Number Of Authorized Shares, Not Disclosed | true |

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