INCOME TAX - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred income tax assets:
Capitalized research and experimental expenditures	$ 130,972	$ 76,731
Operating expenses not currently deductible	22,180	17,263
Stock option and other employee benefit plans	21,864	21,373
Loss and credit carryforwards	7,430	8,589
Deferred revenue	1,923	4,405
Other	111	289
Total deferred income tax assets	184,480	128,650
Valuation allowance	0	0
Total deferred income tax assets, net of valuation allowance	184,480	128,650
Deferred income tax liabilities:
Intangible assets	(242,522)	(256,818)
Property and equipment	(8,659)	(11,220)
Prepaid expenses	(11,889)	(9,503)
Total deferred income tax liabilities	(263,070)	(277,541)
Net deferred income tax liabilities	$ (78,590)	$ (148,891)