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Debt - Additional Information (Detail) - USD ($)
 12 Months Ended
Apr. 15, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]        
Interest expense   $ 0 $ 0 $ 3,004,000
Redemption of aggregate principal amount   0 0 130,000,000
Loss on extinguishment of debt   0 0 (3,529,000)
7.875% Subordinated Notes due 2047        
Debt Instrument [Line Items]        
Interest expense   $ 0 $ 0 3,000,000
Redemption of aggregate principal amount $ 130,000,000      
Subordinated Notes due date 2047      
Loss on extinguishment of debt       $ 3,500,000
Debt instrument, redemption description   On April 15, 2022, the Company redeemed the entire $130.0 million in aggregate principal amount of the outstanding notes plus accrued and unpaid interest on the notes redeemed to, but not including the redemption date of April 15, 2022.