FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Fair Value of Derivatives (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Change in fair value of derivatives	$ (228)	$ 368
Currency Swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Change in fair value of derivatives	0	368
Interest rate swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Change in fair value of derivatives	$ (228)	$ 0