VALUATION AND QUALIFYING ACCOUNTS (Valuation and Qualifying Accounts)(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 1,729	$ 2,181	$ 1,800
Charged to Expenses	3,500	1,704	1,325
Deductions/ Write offs	(3,215)	(2,156)	(944)
Balance at End of Year	$ 2,014	$ 1,729	$ 2,181