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Mining Properties (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Feb. 28, 2017 | Mar. 31, 2017 | Mar. 31, 2016
Property, Plant and Equipment [Line Items] |  |  |
Gain (loss) on sale of assets and investments |  | $ 21,138 | $ 0
Joaquin Project - Argentina [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount | $ 27,400 |  |
Net Smelter Return Percentage Paid | 2.00% |  |
Gain (loss) on sale of assets and investments |  | $ 21,138 |

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2443-110228 + Details
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- Definition Amount, before counterparty netting, of cash proceeds received in transfers of derecognized financial assets from transactions which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719 + Details
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