CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Schedule of Cash and Cash Equivalents and Short-Term Investments (Details) € in Thousands, $ in Thousands	Mar. 31, 2024 USD ($)	Mar. 31, 2024 EUR (€)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	$ 453,763		$ 240,821	$ 185,963
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	433,278		520,326
Unrealized gains	369		554
Unrealized losses	(5)		(259)
Fair market value	433,642		520,621
Debt securities, available-for-sale and held-to-maturity, adjusted cost basis	870,147		910,616
Debt securities, available-for-sale and held-to-maturity, unrealized gains	369		554
Debt securities, available-for-sale and held-to-maturity, unrealized losses	(5)		(259)
Debt securities, available-for-sale and held-to-maturity, fair value	870,511		910,911
Debt securities, available-for-sale and held-to-maturity	870,147		910,616
Asset pledged as collateral
HTM Securities
Debt securities, available-for-sale and held-to-maturity, adjusted cost basis	16,189	€ 15,000
Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	139,373		78,844
Unrealized gains	72		55
Unrealized losses	0		(110)
Fair market value	139,445		78,789
Level 2 | Government and governmental agencies
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis			24,940
Unrealized gains			13
Unrealized losses			0
Fair market value			24,953
Level 2 | Corporate debt securities
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	293,905		416,542
Unrealized gains	297		486
Unrealized losses	(5)		(149)
Fair market value	294,197		416,879
Cash and cash equivalents
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	109,742		0
Debt securities, available-for-sale and held-to-maturity	453,763		240,821
Cash and cash equivalents | Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	109,742
Cash and cash equivalents | Level 2 | Corporate debt securities
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	0		0
Short-term investments (2)
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	323,536		520,326
Debt securities, available-for-sale and held-to-maturity	416,384		669,795
Short-term investments (2) | Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	29,631		78,844
Short-term investments (2) | Level 2 | Government and governmental agencies
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis			24,940
Short-term investments (2) | Level 2 | Corporate debt securities
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	293,905		416,542
Cash
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	17,626		9,955
Cash | Cash and cash equivalents
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	17,626		9,955
Money market funds | Level 1
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	303,191		227,166
Money market funds | Cash and cash equivalents | Level 1
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	303,191		227,166
Certificate of deposits and term deposits | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	116,052		153,169
Certificate of deposits and term deposits | Cash and cash equivalents | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	23,204		3,700
Certificate of deposits and term deposits | Short-term investments (2) | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	$ 92,848		$ 149,469