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Earnings (Loss) Per Share - Components of Earnings Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Earnings Per Share [Abstract]        
Net income from continuing operations available to common shareholders $ 58,042 $ 21,395 $ 129,282 $ 26,233
Net loss from discontinued operations 0 (2,258) (38,036) (7,612)
Net income available to common shareholders $ 58,042 $ 19,137 $ 91,246 $ 18,621
Weighted-average number of common shares outstanding - basic (shares) 32,279,625 31,477,591 32,082,878 31,434,371
Share-based compensation plans (shares) 1,461,843 148,180 1,211,197 191,298
Weighted-average number of common shares - diluted (shares) 33,741,468 31,625,771 33,294,075 31,625,669
Basic earnings per common share from continuing operations (usd per share) $ 1.80 $ 0.68 $ 4.03 $ 0.83
Basic earnings (loss) per common share from discontinued operations (usd per share) 0 (0.07) (1.19) (0.24)
Basic earnings (loss) per common share (usd per share) 1.80 0.61 2.84 0.59
Diluted earnings per common share from continuing operations (usd per share) 1.72 0.68 3.88 0.83
Diluted earnings (loss) per common share from discontinued operations (usd per share) 0 (0.07) (1.14) (0.24)
Diluted earnings (loss) per common share (usd per share) $ 1.72 $ 0.61 $ 2.74 $ 0.59