CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Schedule of Cash and Cash Equivalents and Short-Term Investments (Details) € in Thousands, $ in Thousands	Sep. 30, 2025 USD ($)	Sep. 30, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	$ 342,119		$ 163,767	$ 185,422
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	675,593		625,986
Unrealized gains	240		1,013
Unrealized losses	(34)		(120)
Fair market value	675,799		626,879
Debt securities, available-for-sale and held-to-maturity, adjusted cost basis	1,033,501		959,873
Debt securities, available-for-sale and held-to-maturity, unrealized gains	240		1,013
Debt securities, available-for-sale and held-to-maturity, unrealized losses	(34)		(120)
Debt securities, available-for-sale and held-to-maturity, fair value	1,033,707		960,766
Debt securities, available-for-sale and held-to-maturity	1,033,501		959,873
Asset pledged as collateral
HTM Securities
Debt securities, available-for-sale and held-to-maturity, adjusted cost basis	17,605	€ 15,000
Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	119,302		118,618
Unrealized gains	45		93
Unrealized losses	0		(1)
Fair market value	119,347		118,710
Level 2 | Government and governmental agencies
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis			0
Unrealized gains			0
Unrealized losses			0
Fair market value			0
Level 2 | Corporate debt securities
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	556,291		507,368
Unrealized gains	195		920
Unrealized losses	(34)		(119)
Fair market value	556,452		508,169
Cash and cash equivalents
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	39,895		0
Debt securities, available-for-sale and held-to-maturity	342,119		163,767
Cash and cash equivalents | Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	39,895		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	635,698		625,986
Debt securities, available-for-sale and held-to-maturity	691,382		796,106
Short-term investments (2) | Level 1 | U.S. Treasury bills
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	79,407		118,618
Short-term investments (2) | Level 2 | Government and governmental agencies
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis			0
Short-term investments (2) | Level 2 | Corporate debt securities
HTM Securities
Debt securities, held-to-maturity, adjusted cost basis and recorded basis	556,291		507,368
Cash
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	14,780		11,848
Cash | Cash and cash equivalents
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	14,780		11,848
Money market funds | Level 1
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	256,410		151,919
Money market funds | Cash and cash equivalents | Level 1
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	256,410		151,919
Certificate of deposits and term deposits | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents, fair value	86,718		170,120
Certificate of deposits and term deposits | Cash and cash equivalents | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	31,034		0
Certificate of deposits and term deposits | Short-term investments (2) | Level 2
Debt Securities, Available-for-Sale [Line Items]
Cash and cash equivalents	$ 55,684		$ 170,120