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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Statement of Financial Position [Abstract]    
Available-for-sale securities, allowance for credit loss $ 600 $ 566
Available for sale debt securities, amortized cost 1,209,054 1,162,919
Equity securities, amortized cost 89,110 91,052
Other investments, as fair value $ 4,794 $ 4,794
Cumulative convertible preferred stock, par value (in USD per share) $ 0.01 $ 0.01
Cumulative convertible preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Cumulative convertible preferred stock, shares issued (in shares) 10,000 10,000
Cumulative convertible preferred stock, shares outstanding (in shares) 10,000 10,000
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) 55,000,000 55,000,000
Common stock, shares issued (in shares) 47,269,000 47,269,000
Common stock, shares outstanding (in shares) 28,758,000 28,966,000
Treasury stock, shares (in shares) 18,511,000 18,303,000