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Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ 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/(loss) $ 17,630 $ (13,250) $ 32,777 $ (21,888)
Less: Income distributed to participating securities (538) (552) (1,096) (1,107)
Less: Undistributed income allocable to participating securities (1,394)   (2,550)  
Net income/(loss) available to common stockholders – Basic EPS $ 15,698 $ (13,802) $ 29,131 $ (22,995)
Weighted average common shares (in thousands) 145,542 151,623 145,652 152,071
Basic earnings/(loss) per share $ 0.11 $ (0.09) $ 0.20 $ (0.15)
Net income/(loss) available to common stockholders $ 15,698 $ (13,802) $ 29,131 $ (22,995)
Add back: Undistributed income allocable to participating securities 1,394   2,550  
Less: Reallocation of undistributed income allocable to participating securities considered potentially dilutive (1,367)   (2,529)  
Net income/(loss) available to common stockholders – Diluted EPS $ 15,725 $ (13,802) $ 29,152 $ (22,995)
Weighted average common shares 145,542 151,623 145,652 152,071
Dilutive effect of common stock equivalents, excluding participating securities 3,272   1,352  
Weighted average diluted shares 148,814 151,623 147,004 152,071
Diluted earnings/(loss) per share $ 0.11 $ (0.09) $ 0.20 $ (0.15)