Convertible Notes, Net - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jan. 01, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Repayments of convertible notes	$ 64,650,000	$ 0
Share price (in dollars per share)	$ 31.79
Decrease to additional paid-in capital	$ (5,431,627,000)			$ (5,373,029,000)
Accumulated deficit	(798,992,000)			(794,832,000)
Accrued interest payable	37,479,000			29,851,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Decrease to additional paid-in capital			$ 2,400,000
Accumulated deficit			2,000,000.0
Increase to convertible notes, net			$ 476,000
5.50% Convertible Senior Notes
Debt Instrument [Line Items]
Face Value	$ 300,000,000
Interest Rate	5.50%
4.38% Convertible Senior Notes
Debt Instrument [Line Items]
Face Value	$ 337,850,000
Interest Rate	4.38%
Repayments of convertible notes	$ 64,700,000
Redemption price	0.10025
Convertible Senior Notes
Debt Instrument [Line Items]
Accrued interest payable	$ 6,700,000			$ 6,000,000