STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY (Common Stock) (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Non-Employee Directors [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	0	0	32,000