Earnings Per Common Share - Summary of Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income	$ 41,407	$ 61,422	$ 114,449	$ 146,743
Dividends on preferred shares	(10,455)	(10,455)	(31,364)	(31,364)
Effect of participating securities‒share-based compensation awards	(106)	(147)	(323)	(332)
Net income attributable to common shareholders	30,846	50,820	82,762	115,047
Interest on Exchangeable Notes, net of income taxes	0	6,359	0	18,773
Loss attributable to participating securities	0	(4)	0	(35)
Diluted net income attributable to common shareholders	$ 30,846	$ 57,175	$ 82,762	$ 133,785
Weighted average basic shares outstanding	86,861	86,760	86,800	87,613
Dilutive securities:
Shares issuable pursuant to exchange of the Exchangeable Notes	0	24,328	0	24,328
Diluted weighted average shares outstanding	86,861	111,088	86,800	111,941
Basic earnings per share	$ 0.36	$ 0.59	$ 0.95	$ 1.31
Diluted earnings per share	$ 0.36	$ 0.51	$ 0.95	$ 1.2