REVENUES FROM CONTRACTS WITH CUSTOMERS - Schedule of Changes in Contract Assets and Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Contract Asset
Contract asset, Beginning of period	$ 8,680
Transferred to trade receivable of contract asset included in beginning of the year contract asset	(8,680)
Contract asset, net of transferred to trade receivables on contracts during the period	7,402
Contract asset, End of Period	7,402
Contract Liability
Contract liability, Beginning of Period	11,946
Recognition of revenue included in beginning of year contract liability	(2,276)
Transfers from long-term to short-term	1,692
Foreign currency translation	(82)
Contract liability, End of Period	$ 11,280