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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2021
Fair Value Disclosures [Abstract] |
Summary of Assets and Liabilities Measured At Fair Value on Recurring Basis | Assets and liabilities measured at fair value on a recurring basis are summarized below:
| Fair Value Measurements as of September 30, 2021
(in thousands) | Level 1 |  | Level 2 |  |  |  | Total
Description |  |  |  |  |  |  |
Cash equivalents (a) | $ | 305,432 |  |  | $ | — |  |  |  |  | $ | 305,432 |
Israeli severance funds (b) | $ | — |  |  | $ | 1,982 |  |  |  |  | $ | 1,982 |
| Fair Value Measurements as of December 31, 2020
(in thousands) | Level 1 |  | Level 2 |  |  |  | Total
Description |  |  |  |  |  |  |
Cash equivalents (a) | $ | 199 |  |  | $ | — |  |  |  |  | $ | 199 |
Israeli severance funds (b) | $ | — |  |  | $ | 6,422 |  |  |  |  | $ | 6,422 |
Derivative financial instruments (c) | $ | — |  |  | $ | (700) |  |  |  |  | $ | (700) |
a.Cash equivalents include funds held in money market instruments and are reported at their current carrying value, which approximates fair value due to the short-term nature of these instruments and are included in cash and cash equivalents in the condensed consolidated balance sheet. b.We partially fund a liability for our Israeli severance requirement through monthly deposits into fund accounts, the value of these contributions is recorded to non-current assets on the condensed consolidated balance sheet. c.Derivative instruments are reported based on published market prices for similar assets or are estimated based on published market prices for similar assets or are estimated based on observable inputs such as interest rates, yield curves, credit risks, spot and future commodity prices and spot and future exchange rates. See Note 10 for additional information on our derivative financial instruments.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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