Convertible Senior Notes - Convertible Debt (Detail) - 0.375% Convertible Senior Notes due 2024 - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Principal amount	$ 287,476	$ 287,489
Unamortized debt discount	0	(28,220)
Unamortized debt issuance costs	(3,764)	(4,011)
Total convertible senior notes	$ 283,712	$ 255,258

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Balance Type:	credit
Period Type:	instant