ORGANIZATION AND BUSINESS - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) continent country point_of_presence	Mar. 31, 2019 USD ($)	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of points of presence (more than) | point_of_presence	600
Number of continents | continent	6
Number of countries (more than) | country	140
Excise and sales taxes collected	$ 5,600	$ 5,900
Contract with customer, liability	82,000			$ 76,000
Contract with customer, liability, revenue recognized	3,800
Contract with customer, liability, additions	10,700
Deferred commissions	24,700			23,000
Depreciation and amortization	46,400	40,700
Capitalized labor costs	3,800	4,200
Capitalized software costs	1,100	$ 1,100
Disputed supplier expense	28,800			12,200
Receivables from suppliers	36,000			10,700
Cumulative effect of new accounting principle in period of adoption			$ (9,100)
Accounts Receivable
Finite-Lived Intangible Assets [Line Items]
Contract with customer, asset, current	$ 134,400			$ 145,900
Accumulated Deficit
Finite-Lived Intangible Assets [Line Items]
Cumulative effect of new accounting principle in period of adoption			(9,100)
Accounting Standards Update 2016-13 [Member] | Accumulated Deficit
Finite-Lived Intangible Assets [Line Items]
Cumulative effect of new accounting principle in period of adoption			$ (9,100)