Convertible Senior Notes - Schedule of Net Carrying Amount of Equity Component (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
0.375% Convertible Senior Notes Due 2025 as Equity Component [Member]
Debt Instrument [Line Items]
Debt discount for conversion option	$ 98,730	$ 98,730
Issuance costs	(2,120)	(2,120)
Net carrying amount	96,610	96,610
0.25%Convertible Senior Notes Due 2022 as Equity Component [Member]
Debt Instrument [Line Items]
Debt discount for conversion option	5,136	33,349
Issuance costs	(138)	(898)
Net carrying amount	$ 4,998	$ 32,451

Debt instrument convertible gross carrying amount of the equity component.

No definition available.

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

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-Publisher FASB
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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