RESTRUCTURING AND RELATED CHARGES - Schedule of Restructuring Liability Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 14,131	$ 699
Charges payable in cash	31,179	38,403
Cash payments	(32,997)	(26,617)
Foreign currency translation	(964)	1,646
Restructuring reserve, ending balance	11,349	14,131	$ 699
Stock-based compensation	33,169	39,010	81,615
Employee Severance and Benefit Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	13,297	699
Charges payable in cash	28,803	36,266
Cash payments	(30,100)	(25,328)
Foreign currency translation	(962)	1,660
Restructuring reserve, ending balance	11,038	13,297	699
Stock-based compensation	1,700
Other Exit Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	834	0
Charges payable in cash	2,376	2,137
Cash payments	(2,897)	(1,289)
Foreign currency translation	(2)	(14)
Restructuring reserve, ending balance	$ 311	$ 834	$ 0