INTANGIBLE ASSETS AND GOODWILL - Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 273,048	$ 270,505
Accumulated Amortization	(44,129)	(31,663)
Net Carrying Amount	228,919	238,842
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,300	27,300
Accumulated Amortization	(2,668)	(1,940)
Net Carrying Amount	24,632	25,360
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	189,000	189,000
Accumulated Amortization	(31,500)	(22,909)
Net Carrying Amount	157,500	166,091
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	47,800	47,800
Accumulated Amortization	(8,763)	(6,373)
Net Carrying Amount	39,037	41,427
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,948	6,405
Accumulated Amortization	(1,198)	(441)
Net Carrying Amount	$ 7,750	$ 5,964