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PROPERTY, PLANT AND EQUIPMENT (Details 9) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of finance lease and operating lease by lessee [line items]
Gross Value	$ 1,176,347	$ 1,033,703	$ 1,459,149
Interest	(63,313)	(75,631)	(124,261)
Present Value	1,113,034	958,072	1,334,888
Not Later Than One Year [Member]
Disclosure of finance lease and operating lease by lessee [line items]
Gross Value	303,863	285,168
Interest	(32,447)	(32,365)	(47,492)
Present Value	271,416	252,803	313,370
Between One And Five Years [Member]
Disclosure of finance lease and operating lease by lessee [line items]
Gross Value	835,696	704,822
Interest	(30,050)	(43,146)	(75,363)
Present Value	805,646	661,676	927,874
Over five years
Disclosure of finance lease and operating lease by lessee [line items]
Gross Value	36,788	43,713
Interest	(816)	(120)	(1,406)
Present Value	$ 35,972	$ 43,593	$ 93,644

X

- 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

The amount of interest expense on finance leases. [Refer: Interest expense]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-02&anchor=para_112_c&doctype=Standard&book=B
-URIDate 2017-03-09

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- Definition

The amount of payments over the finance lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 17
-IssueDate 2017-01-01
-Paragraph 31
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_31_b&doctype=Standard&book=B
-URIDate 2017-03-09

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- Definition

Amount of minimum finance lease payments payable gross.

+ References

No definition available.

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