SEGMENT INFORMATION - Schedule of Reportable Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from External Customer [Line Items]
Total revenues	$ 3,221,253	$ 2,853,915	$ 2,419,226
Cost of sales	717,442	580,235	532,062
Research and development	921,930	747,184	746,773
NET INCOME	348,901	426,859	167,645
Reportable Segment
Revenue from External Customer [Line Items]
Total revenues	3,221,253	2,853,915	2,419,226
Cost of sales	717,442	580,235	532,062
S&M expenses	530,156	476,739	488,442
G&A expenses	622,861	532,286	403,964
Other segment expense, net	79,963	90,612	80,340
NET INCOME	348,901	426,859	167,645
Research and early pipeline | Reportable Segment
Revenue from External Customer [Line Items]
Research and development	383,705	434,023	393,078
Later-stage clinical programs | Reportable Segment
Revenue from External Customer [Line Items]
Research and development	308,334	27,581	62,604
Marketed products | Reportable Segment
Revenue from External Customer [Line Items]
Research and development	$ 229,891	$ 285,580	$ 291,091