Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Nov. 12, 2024	Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items]
Common Stock, Shares, Outstanding	45,005,284
Number of new common stock issued	48,876,882	48,875,167
Common stock, par value (in dollars per share)						$ 0.01
Net income (loss) attributable to shareholders	$ (261,692)	$ (556,449)	$ 3,632
Noncontrolling Interest, Change in Redemption Value	(50,054)	(9,225)
Share Repurchase Program, Authorized, Amount					$ 50,000
Payments for Repurchase of Common Stock	$ 29,942	$ 11,698	$ 4,510
Treasury Stock, Shares, Acquired	3,434,745	937,141	325,068	1,605,316
Treasury Stock, Value, Acquired, Cost Method	$ 29,942	$ 11,699	$ 4,510	$ 14,217
Shares Acquired, Average Cost Per Share	$ 8.72	$ 12.48	$ 13.88	$ 8.86
Class of Warrant or Right, Outstanding	5,092,707
Warrants exercise price (in dollars per share)	$ 18.50
Specialty Property & Casualty Program
Schedule Of Earnings Per Share [Line Items]
Share Repurchase Program, Remaining Authorized, Amount	$ 8,449
Common Stock [Member]
Schedule Of Earnings Per Share [Line Items]
Stock Issued During Period, Shares, New Issues		22,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	(1,501,689)