REVENUE - Allowance for Doubtful Accounts (Details) - SEC Schedule, 12-09, Allowance, Credit Loss [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	$ 0	$ 42,826	$ 32,144
Write-Off of Receivables	0	0	(34,920)
Charged to Costs and Expenses	0	0	45,602
Balance at End of Period	$ 0	$ 0	$ 42,826