CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Summary of Amortized Cost And Recorded Basis of T-bills in Short Term Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments	$ 741,562	$ 728,898
U.S. Treasury bills
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments	24,857	199,981
Other government and governmental agency notes
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments	34,786	0
Corporate debt securities
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments	196,274	104,823
Certificate of deposits, notes and term deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments	$ 485,645	$ 424,094