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Consolidated Balance Sheets (Parenthetical) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]      
Fixed maturity securities, held-to-maturity, allowance for credit losses $ 116,000 $ 182,000  
Fixed maturity securities, fair value 399,721,000 473,092,000  
Fixed maturity securities, available-for-sale, allowance for credit losses 0 0  
Fixed maturity securities, amortized cost 318,975,000 326,171,000  
Equity securities, cost 36,020,000 44,046,000  
Amounts recoverable from reinsurers, allowance for credit losses 300,000 360,000  
Premiums receivable, allowance for credit losses $ 4,238,000 $ 4,674,000 $ 4,852,000
Common stock, par value $ 0.01 $ 0.01  
Common stock, shares authorized 50,000,000 50,000,000  
Common stock, shares issued 20,733,166 20,704,448  
Common stock, shares outstanding 19,050,315 19,135,008  
Treasury stock, shares 1,682,851 1,569,440