Net Loss Per Share - Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net loss		$ (703,488)	$ (418,780)	$ (554,128)
Weighted-average common shares outstanding - basic		87,559,000	81,262,000	77,956,000
Effect of dilutive securities*	[1]	0	0	0
Weighted-average common shares outstanding - diluted		87,559,000	81,262,000	77,956,000
Net loss per share - basic and diluted		$ (8.03)	$ (5.15)	$ (7.11)
Net loss per share - basic and diluted		$ (8.03)	$ (5.15)	$ (7.11)

[1] For the years ended December 31, 2022, 2021 and 2020, stock options, RSAs, RSUs and ESPP to purchase of approximately 11.2 million, 9.7 million and 9.0 million shares of common stock, respectively, were excluded from the net loss per share calculation as their effect would have been anti-dilutive. The Company accounts for the effect of its 2027 Notes and 2024 Notes on diluted net earnings per share (“EPS”) using the if-converted method as this obligation may be settled in cash or shares at the Company’s option. The effect of potential share settlement is included in the diluted EPS calculation if the effect is more dilutive. During the year ended December 31, 2022, the inclusion of the potential share settlement of the 2027 Notes was anti-dilutive. During the years ended December 31, 2022, 2021 and 2020, the inclusion of the potential share settlement of the 2024 Notes was anti-dilutive. Accordingly, the potential conversion of 5,712,253, 7,763,970 and 7,763,970 shares related to the 2024 Notes has been excluded from the computation of diluted net loss per share for the years ended December 31, 2022, 2021 and 2020, respectively, and the potential conversion of 8,100,485 shares related to the 2027 Notes has been excluded from the computation of diluted net loss per share for the year ended December 31, 2022.