Net Profit per Share - Computation of Basic and Diluted Net Profit Per Share Attributable to Common Stock (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 772,020	$ 1,775,888	$ 442,776
Denominator:
Weighted-average common shares outstanding, basic (shares)	78,917	78,760	79,424
Dilutive effect of potential common stock (shares)	753	470	676
Total shares, diluted (shares)	79,670	79,230	80,100
Net income per share, basic (usd per share)	$ 9.78	$ 22.55	$ 5.57
Net income per share, diluted (usd per share)	$ 9.69	$ 22.41	$ 5.53
Anti-dilutive potential common shares (shares)	1	280	79