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TRADE AND OTHER ACCOUNTS RECEIVABLE CURRENT, AND NON-CURRENT ACCOUNTS RECEIVABLE (Details 4) - Accumulated Impairment [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of reconciliation of changes in goodwill [line items] |  |  |
Opening balance | $ (77,054) | $ (60,072) | $ (71,042)
Write-offs | 8,249 | 20,910 | 10,120
(Increase) Decrease | (19,104) | (37,892) | 850
Closing balance | $ (87,909) | $ (77,054) | $ (60,072)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Amount of increase decrease allowance for credit losses related to receivables. + References No definition available. + Details
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- Definition It represents the amount of trade receivables allowance for impairment loss. + References No definition available. + Details
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- Definition Amount of write off allowance for credit losses related to receivables. + References No definition available. + Details
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- Details
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