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Convertible Senior Notes - Convertible Debt (Detail) - 0.375% Convertible Senior Notes due 2024 - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Principal amount	$ 287,485	$ 287,489
Unamortized debt discount	0	(28,220)
Unamortized debt issuance costs	(4,218)	(4,011)
Total convertible senior notes	$ 283,267	$ 255,258

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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