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Schedule II - Condensed Financial Information of Registrant - Condensed Balance Sheets - Additional Information (Detail) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items]    
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 47,179,000
Common stock, shares outstanding (in shares) 28,966,000 30,389,000
Treasury stock, shares (in shares) 18,303,000 16,790,000
Parent Company    
Condensed Financial Statements, Captions [Line Items]    
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
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 47,179,000
Common stock, shares outstanding (in shares) 28,966,000 30,389,000
Treasury stock, shares (in shares) 18,303,000 16,790,000