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Net Income per Common Share - Summary of Calculation of Basic and Diluted EPS (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Numerator:                
Net income $ 613,145 $ 497,235 $ 172,580 $ 85,932 $ 78,924 $ 8,767 $ 1,282,960 $ 173,623
Denominator:                
Weighted average shares outstanding, basic 204,268     116,731     205,976 116,542
Dilutive effect of options and RSUs 1,362     1,295     1,537 1,148
Weighted average shares outstanding, diluted 205,630     118,026     207,513 117,690
Net income per share:                
Basic $ 3.00     $ 0.74     $ 6.23 $ 1.49
Diluted $ 2.98     $ 0.73     $ 6.18 $ 1.48
Antidilutive and contingent RSUs excluded from diluted EPS 220     299     241 389