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NEW ACCOUNTING STANDARDS AND INTERPRETATIONS NOT YET APPLIED (Details) - USD ($) $ in Thousands | Jan. 01, 2019 | Jan. 01, 2018
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Disclosure of expected impact of initial application of new standards or interpretations [line items] |  |
Impact of initial application of new IFRS on retained earnings |  | $ (791)
IFRS 16 [Member] |  |
Disclosure of expected impact of initial application of new standards or interpretations [line items] |  |
Right-of-use assets recognized in the consolidated statement of financial position | $ 80,000 |
Operating lease liabilities recognized in the consolidated statement of financial position | 88,000 |
Impact of initial application of new IFRS on accounts payable and accrued liabilities | (2,000) |
Impact of initial application of new IFRS on other provisions related to lease exit costs | (5,000) |
Impact of initial application of new IFRS on retained earnings | $ (1,000) |

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