Convertible Senior Notes - Convertible Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total convertible senior notes	$ 285,956	$ 284,615
0.375% Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Principal amount	287,437	287,470
Unamortized debt issuance costs	(1,481)	(2,855)
Total convertible senior notes	$ 285,956	$ 284,615