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FAIR VALUE MEASUREMENTS - Change in Investment in Privately Held Companies (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning balance | $ 7,648 |  |
Ending balance | 11,910 |  |
Convertible debt fair value | 488,300 |  | $ 642,000
Privately held investment |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Beginning balance | 7,648 | $ 8,345 |
New investments | 400 | 500 |
Sales of investments | (3,954) | (400) |
Changes in foreign exchange rates | (675) | (52) |
Changes in fair value included in other income | 5,989 | 100 |
Changes in fair value included in other comprehensive income | 2,502 | 1,220 |
Ending balance | $ 11,910 | $ 9,713 |

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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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