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Schedule of Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Nov. 13, 2019
--- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |  |
Marketable securities |  | $ 338,836 | $ 610,840 |
Contingent consideration |  |  |  | $ 24,000
Carrying Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |  |
Cash and cash equivalents |  | 1,122,199 | 914,121 |
Marketable securities |  | 378,089 | 640,260 |
Derivative assets |  | 92 | 95 |
Contingent consideration |  | 0 | 7,227 |
Derivative liabilities |  | 118 | 504 |
Convertible debt | [1] | 108,426 | 410,111 |
Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |  |  |
Cash and cash equivalents |  | 1,122,199 | 914,121 |
Marketable securities |  | 378,089 | 640,260 |
Derivative assets |  | 92 | 95 |
Contingent consideration |  | 0 | 7,227 |
Derivative liabilities |  | 118 | 504 |
Convertible debt | [1] | $ 604,648 | $ 1,739,553 |
[1] | The carrying value represents the bifurcated debt component only, while the fair value is based on quoted market prices for the convertible note which includes the equity conversion features.

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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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