Earnings (Loss) Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income from continuing operations available to common shareholders	$ 61,364	$ 110,241	$ 192,779	$ 239,523
Net loss from discontinued operations	0	0	0	(38,036)
Net income available to common shareholders	$ 61,364	$ 110,241	$ 192,779	$ 201,487
Weighted-average number of common shares outstanding - basic (shares)	32,455,814	32,449,853	32,706,652	32,206,547
Share-based compensation plans (shares)	770,793	1,418,700	1,000,212	1,281,125
Weighted-average number of common shares - diluted (shares)	33,226,607	33,868,553	33,706,864	33,487,672
Basic earnings per common share from continuing operations (usd per share)	$ 1.89	$ 3.40	$ 5.89	$ 7.44
Basic earnings (loss) per common share from discontinued operations (usd per share)	0	0	0	(1.18)
Basic earnings (loss) per common share (usd per share)	1.89	3.40	5.89	6.26
Diluted earnings per common share from continuing operations (usd per share)	1.85	3.25	5.72	7.15
Diluted earnings (loss) per common share from discontinued operations (usd per share)	0	0	0	(1.13)
Diluted earnings (loss) per common share (usd per share)	$ 1.85	$ 3.25	$ 5.72	$ 6.02