SEGMENT INFORMATION - Schedule of Total Revenues and Disaggregates Net Product Revenues by Product (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
Product
Revenue from External Customer [Line Items]
Total revenues	3,167,759	2,809,445	2,372,538
VOXZOGO
Revenue from External Customer [Line Items]
Total revenues	926,923	735,092	469,881
VIMIZIM
Revenue from External Customer [Line Items]
Total revenues	792,051	739,784	701,053
NAGLAZYME
Revenue from External Customer [Line Items]
Total revenues	485,400	479,584	420,292
PALYNZIQ
Revenue from External Customer [Line Items]
Total revenues	433,310	355,047	303,919
ALDURAZYME
Revenue from External Customer [Line Items]
Total revenues	208,508	183,887	131,248
BRINEURA
Revenue from External Customer [Line Items]
Total revenues	186,397	169,083	161,889
KUVAN
Revenue from External Customer [Line Items]
Total revenues	99,530	120,902	180,767
ROCTAVIAN
Revenue from External Customer [Line Items]
Total revenues	35,640	26,066	3,489
Royalty and other revenues
Revenue from External Customer [Line Items]
Total revenues	$ 53,494	$ 44,470	$ 46,688