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LONG-TERM DEBT AND LINES OF CREDIT - Schedule of effect on other comprehensive income (loss) (Details) - USD ($) $ in Thousands | 7 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2017 | May 31, 2016 | May 31, 2015
Debt Disclosure [Abstract] |  |  |  |
Amount of net unrealized gain (loss) recognized in other comprehensive income | $ 5,532 | $ 4,549 | $ (12,859) | $ (10,116)
Amount of net losses reclassified out of other comprehensive income to interest expense | $ 4,222 | $ 5,673 | $ 8,240 | $ 3,958

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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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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + 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 + Details
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