Convertible Notes - Summary of the carrying value of the convertible notes (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Principal amount	$ 325,000	$ 325,000
Plus: premium on Additional Notes	250	250
Carrying amount	325,250	325,250
Debt Instrument, Unamortized Discount	(4,685)	(6,626)
Carrying amount	$ 320,565	$ 318,624
Effective interest rate	4.60%	4.60%
Two Thousand And Twenty One Notes [Member]
Debt Instrument [Line Items]
Principal amount	$ 150,000	$ 150,000
Plus: premium on Additional Notes	0	0
Carrying amount	150,000	150,000
Debt Instrument, Unamortized Discount	(3,195)	(3,833)
Carrying amount	$ 146,805	$ 146,167
Effective interest rate	3.83%	3.83%
Two Thousand And Twenty Notes [Member]
Debt Instrument [Line Items]
Principal amount	$ 175,000	$ 175,000
Plus: premium on Additional Notes	250	250
Carrying amount	175,250	175,250
Debt Instrument, Unamortized Discount	(1,490)	(2,793)
Carrying amount	$ 173,760	$ 172,457
Effective interest rate	5.26%	5.26%