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DERIVATIVE INSTRUMENTS (Effect of Derivative Instruments Designated Cash Flow Hedges on Statements of Operations) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Roll Forward] |  |
Balance in AOCI Beginning of Year | $ 1,871 | $ 0
Amount of Gain (Loss) Recognized in AOCI | (3,425) | 1,871
Amount of Gain (Loss) Reclassified from AOCI into Earnings | 2,958 | 0
Balance in AOCI End of Year | (4,512) | 1,871
Interest rate swap | Interest (expense) |  |
Derivative Instruments, Gain (Loss) [Roll Forward] |  |
Balance in AOCI Beginning of Year | 1,871 | 0
Amount of Gain (Loss) Recognized in AOCI | (1,355) | 1,871
Amount of Gain (Loss) Reclassified from AOCI into Earnings | (76) | 0
Balance in AOCI End of Year | 592 | 1,871
Cross-currency swap | Other income (expense) |  |
Derivative Instruments, Gain (Loss) [Roll Forward] |  |
Balance in AOCI Beginning of Year | 0 |
Amount of Gain (Loss) Recognized in AOCI | (2,070) |
Amount of Gain (Loss) Reclassified from AOCI into Earnings | 3,034 |
Balance in AOCI End of Year | $ (5,104) | $ 0

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- Definition Accumulated Other Comprehensive Income Loss Cumulative Changes in Net Gain Loss from Cash Flow Hedge Effect Before Tax + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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