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SUPPLEMENTAL CASH FLOW INFORMATION - Non-cash Investing and Financing Transactions (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Cash Flow Statement [Abstract] |  |
Common shares issued pursuant to the acquisition of Seabee Gold Operation (note 3) | $ 0 | $ (325,202)
Options issued pursuant to the acquisition of Seabee Gold Operation (note 3) | 0 | (4,045)
Marketable securities received for sale of exploration and evaluation assets (note 6) | 992 | 7,329
Deferred consideration received for sale of exploration and evaluation asset | 0 | 829
Marketable securities provided as consideration for exploration and evaluation expenses | 0 | (761)
Transfer of share-based payment reserve upon exercise of stock options | (1,339) | (4,258)
Acquisition of Chinchillas mineral property (note 3) | $ 28,839 | $ 0

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- Definition Consideration Paid In Marketable Securities For Sale Of Assets + References No definition available. + Details
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- Definition The value of options issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References No definition available. + Details
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