MARKETABLE SECURITIES - Schedule of Gross Unrealized Losses And Fair Value of Available For Sale Securities (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Marketable Securities [Line Items]
Total fair value of available-for-sale securities in a continuous unrealized loss position for less than twelve months	$ 511,190
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position for less than twelve months	(146)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer, accumulated loss	0
Total fair value of available-for-sale securities in a continuous unrealized loss position	511,190
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position	(146)
Corporate bonds | Marketable securities
Marketable Securities [Line Items]
Total fair value of available-for-sale securities in a continuous unrealized loss position for less than twelve months	155,043
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position for less than twelve months	(43)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer, accumulated loss	0
Total fair value of available-for-sale securities in a continuous unrealized loss position	155,043
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position	(43)
Certificates of deposit | Marketable securities
Marketable Securities [Line Items]
Total fair value of available-for-sale securities in a continuous unrealized loss position for less than twelve months	15,650
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position for less than twelve months	(1)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer, accumulated loss	0
Total fair value of available-for-sale securities in a continuous unrealized loss position	15,650
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position	(1)
Asset backed securities | Marketable securities
Marketable Securities [Line Items]
Total fair value of available-for-sale securities in a continuous unrealized loss position for less than twelve months	81,478
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position for less than twelve months	(18)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer, accumulated loss	0
Total fair value of available-for-sale securities in a continuous unrealized loss position	81,478
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position	(18)
U.S. government agency securities | Marketable securities
Marketable Securities [Line Items]
Total fair value of available-for-sale securities in a continuous unrealized loss position for less than twelve months	259,019
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position for less than twelve months	(84)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer	0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months of longer, accumulated loss	0
Total fair value of available-for-sale securities in a continuous unrealized loss position	259,019
Total gross unrealized losses of available-for-sale securities in a continuous unrealized loss position	$ (84)