INCOME TAXES - Schedule of Reconciliation of Statutory Federal Income Tax Benefit to Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Federal statutory income tax rate	$ 39,598	$ 31,412	$ (15,824)
State and local taxes	(3,614)	(1,017)	509
Orphan Drug & General Business Credit	(39,535)	(35,674)	(29,363)
Stock compensation expense	2,209	6,433	7,859
Foreign Source Income Subject to US Tax	47,721	(5,644)	16,878
Foreign tax rate differential	(69,987)	(4,051)	(16,971)
Section 162(m) limitation	9,699	6,577	6,304
Tax Reserves	27,296	18,043	15,530
Intra-entity transfer of assets	5,019	(18,752)	(3,920)
Valuation allowance/deferred benefit	3,723	7,851	6,821
Other	(1,211)	2,837	907
Provision for (benefit from) income taxes	20,918	8,015	(11,270)
Valuation allowance	$ 119,230	$ 116,299
Dutch
Income Tax Contingency [Line Items]
Valuation allowance			$ 9,300