CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Schedule of Cash and Cash Equivalents and Short-Term Investments (Details) € in Thousands, $ in Thousands	Sep. 30, 2024 USD ($)	Sep. 30, 2024 EUR (€)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	$ 185,422		$ 240,821	$ 154,860
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	575,066		520,326
Unrealized gains	2,136		554
Unrealized losses	(1)		(259)
Fair market value	577,201		520,621
Debt securities, available-for-sale and held-to-maturity, adjusted cost basis	959,898		910,616
Debt securities, available-for-sale and held-to-maturity, unrealized gains	2,136		554
Debt securities, available-for-sale and held-to-maturity, unrealized losses	(1)		(259)
Debt securities, available-for-sale and held-to-maturity, fair value	962,033		910,911
Debt securities, available-for-sale and held-to-maturity	959,898		910,616
Asset pledged as collateral
HTM Securities
Debt securities, available-for-sale and held-to-maturity, adjusted cost basis	16,741	€ 15,000
Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	118,319		78,844
Unrealized gains	194		55
Unrealized losses	0		(110)
Fair market value	118,513		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	456,747		416,542
Unrealized gains	1,942		486
Unrealized losses	(1)		(149)
Fair market value	458,688		416,879
Cash and cash equivalents
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	0		0
Debt securities, available-for-sale and held-to-maturity	185,422		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	0
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	575,066		520,326
Debt securities, available-for-sale and held-to-maturity	774,476		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	118,319		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	456,747		416,542
Cash
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	13,765		9,955
Cash | Cash and cash equivalents
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	13,765		9,955
Money market funds | Level 1
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	171,657		227,166
Money market funds | Cash and cash equivalents | Level 1
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	171,657		227,166
Certificate of deposits and term deposits | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	199,410		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			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	$ 199,410		$ 149,469