MARKETABLE SECURITIES - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Cash and money market	$ 135,320	$ 247,335
Cash equivalents	54,456	68,136
Restricted cash	297	297	$ 284
Total cash, cash equivalents and restricted cash	190,073	315,768	$ 1,104,100	$ 1,491,594
Available-for-sale debt securities	679,839	779,805
Equity securities	1,821	3,336
Total marketable securities	627,204	715,005
Total cash and cash equivalents, restricted cash and marketable securities	817,277	1,030,773
Marketable securities
Marketable Securities [Line Items]
Available-for-sale debt securities	$ 625,383	$ 711,669

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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