FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Fair Value of Derivatives (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Change in fair value of derivatives	$ (1,101)	$ (1,100)	$ (1,329)	$ (732)
Currency Swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Change in fair value of derivatives	0	(1,100)	0	(732)
Interest rate swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Change in fair value of derivatives	$ (1,101)	$ 0	$ (1,329)	$ 0

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration