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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Statement of Financial Position [Abstract] |  |
Available-for-sale securities, allowance for credit loss | $ 722 | $ 1,018
Available for sale debt securities, amortized cost | 1,454,822 | 1,353,532
Equity securities, amortized cost | 95,476 | 79,917
Other investments, cost | $ 4,000 | $ 8,794
Cumulative convertible preferred stock, par value (in USD per share) | $ 0.01 | $ 0.01
Cumulative convertible preferred stock, shares authorized (in shares) | 1,000 | 1,000
Cumulative convertible preferred stock, shares issued (in shares) | 10 | 10
Cumulative convertible preferred stock, shares outstanding (in shares) | 10 | 10
Cumulative convertible preferred stock, minimum liquidation preference (in USD per share) | $ 9.99 | $ 9.99
Common stock, par value (in USD per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 55,000 | 55,000
Common stock, shares issued (in shares) | 48,064 | 47,478
Common stock, shares outstanding (in shares) | 28,048 | 28,096
Treasury stock, shares (in shares) | 20,016 | 19,382

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