VALUATION AND QUALIFYING ACCOUNTS (Valuation and Qualifying Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts for Accounts Receivable
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 1,186	$ 2,014	$ 1,729
Additions	2,722	998	3,500
Deductions/ Write offs	(2,351)	(1,826)	(3,215)
Balance at End of Year	1,557	1,186	2,014
Valuation Allowance on Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	924	0
Additions	2,265	924
Deductions/ Write offs	0	0
Balance at End of Year	$ 3,189	$ 924	$ 0