REVENUE Revenue from Contract with Customer (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 14,418	$ 16,513
Contract with Customer, Asset, Net, Noncurrent	0
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	20,016
Contract with Customer, Asset, Reclassified to Receivable	(22,111)
Contract with Customer, Asset, Net, Current	$ 14,418