INTANGIBLE ASSETS - Schedule of intangible assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 237,587	$ 226,267
Finite-Lived Intangible Assets, Accumulated Amortization	(72,555)	(57,328)
Finite-lived intangible assets, net	165,032	168,939
Technology Equipment [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	91,605	85,075
Finite-Lived Intangible Assets, Accumulated Amortization	(33,055)	(24,999)
Finite-lived intangible assets, net	58,550	60,076
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	118,733	114,171
Finite-Lived Intangible Assets, Accumulated Amortization	(32,182)	(26,880)
Finite-lived intangible assets, net	86,551	87,291
Trademarks and other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	27,249	27,021
Finite-Lived Intangible Assets, Accumulated Amortization	(7,318)	(5,449)
Finite-lived intangible assets, net	$ 19,931	$ 21,572