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OPERATING SEGMENTS - Long Lived Assets by Geographic Areas (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of geographical areas [line items] |  |
Non-current assets | $ 774,695 | $ 719,139
Canada |  |
Disclosure of geographical areas [line items] |  |
Non-current assets | 357,783 | 348,455
United States |  |
Disclosure of geographical areas [line items] |  |
Non-current assets | 236,054 | 224,612
Argentina |  |
Disclosure of geographical areas [line items] |  |
Non-current assets | 113,534 | 79,250
Mexico |  |
Disclosure of geographical areas [line items] |  |
Non-current assets | 66,749 | 66,131
Other |  |
Disclosure of geographical areas [line items] |  |
Non-current assets | $ 575 | $ 691

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- Definition The amount of non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Financial instruments, class [member]; Non-current assets; Types of insurance contracts [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 33 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_33_b&doctype=Standard -URIDate 2018-03-16 + Details
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