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REVENUE - Impact of Adoption of Standards (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Condensed Consolidated Balance Sheets
Accounts receivable, net	$ 336,303		$ 336,303		$ 310,169
Condensed Consolidated Statement of Comprehensive Income (Loss)
Net revenue	615,880	$ 493,928	1,589,638	$ 1,434,061
Provision for doubtful accounts			0	0
Operating loss	(11,725)	$ 12,759	(14,600)	24,721
Condensed Consolidated Statements of Cash Flows
Accounts receivable, net			71,029	(32,483)
Prior to ASC 606 Adoption
Condensed Consolidated Balance Sheets
Accounts receivable, net	336,303		336,303		310,169
Condensed Consolidated Statement of Comprehensive Income (Loss)
Net revenue			1,644,903	1,479,058
Provision for doubtful accounts			(55,265)	(44,997)
Operating loss			(14,600)	24,721
Condensed Consolidated Statements of Cash Flows
Accounts receivable, net			71,029	(32,483)
Adjustments for ASC 606 \| Adjustments for ASC 606
Condensed Consolidated Balance Sheets
Accounts receivable, net	$ 0		0		$ 0
Condensed Consolidated Statement of Comprehensive Income (Loss)
Net revenue			(55,265)	(44,997)
Provision for doubtful accounts			55,265	44,997
Operating loss			0	0
Condensed Consolidated Statements of Cash Flows
Accounts receivable, net			$ 0	$ 0