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Reconciliation 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 $ 87,325 $ 43,338 $ 277,674 $ 87,160
Weighted average shares outstanding - basic 33,145 33,433 33,480 33,427
Dilutive effect of stock options and restricted stock 376 440 327 415
Weighted average shares outstanding - diluted 33,521 33,873 33,807 33,842
Earnings per share - basic $ 2.63 $ 1.30 $ 8.29 $ 2.61
Earnings per share - diluted $ 2.61 $ 1.28 $ 8.21 $ 2.58