VALUATION AND QUALIFYING ACCOUNTS (Valuation and Qualifying Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts for Trade Receivables and Contract Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 1,557	$ 1,186	$ 2,014
Additions	2,072	2,722	998
Deductions/ Write offs	(419)	(2,351)	(1,826)
Balance at End of Year	3,210	1,557	1,186
Valuation Allowance on Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	3,189	924	0
Additions	688	2,265	924
Deductions/ Write offs	0	0	0
Balance at End of Year	$ 3,877	$ 3,189	$ 924