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Consolidated Statements of Financial Position (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Investments:    
Fixed maturities available-for-sale, cost $ 1,432,454 $ 1,401,301
Private equity funds 85,157 93,337
Restricted Cash and Investments, Current 1,554 1,554
Accounts Receivable, Allowance for Credit Loss $ 740 $ 516
Common Stock Class A [Member]    
Stockholders' equity:    
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 54,625,652 54,235,165
Common stock, shares outstanding (in shares) 54,625,652 54,235,165
Treasury Stock, Common, Shares 4,327,810 4,327,810
Common Stock Class B [Member]    
Stockholders' equity:    
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized (in shares) 2,000,000 2,000,000
Common stock, shares issued (in shares) 1,001,714 1,001,714
Common stock, shares outstanding (in shares) 1,001,714 1,001,714
Treasury Stock, Common, Shares 1,001,714 1,001,714