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Mining Properties (Details Textual) $ in Thousands, shares in Millions, oz in Millions |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 25, 2016 USD ($) | May 31, 2016 USD ($) | Apr. 30, 2016 USD ($) shares | Mar. 31, 2016 USD ($) shares | Dec. 31, 2016 USD ($) oz | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jan. 17, 2017 USD ($) | Apr. 19, 2016 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Maximum ore reserves payable under contract | oz |  |  |  |  | 20.0 |  |  |  |
Gain on sale of assets and investments |  |  |  |  | $ 11,334 | $ (352) | $ (530) |  |
Write-downs |  |  |  |  | $ 4,446 | 313,337 | 1,472,721 |  |
Cumulative Ounces of Silver Received by the Subsidiary | oz |  |  |  |  | 6.0 |  |  |  |
Current Ore Reserve payable Ounces Based on Current Metallurgical Recovery and Current Smelter Contract Terms | oz |  |  |  |  | 1.4 |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  | $ 4,446 | $ 313,337 | $ 1,472,721 |  |
Cerro Bayo Mine [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Net smelter return paid (as a percent) |  |  |  | 2.00% |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount |  |  |  | $ 5,700 |  |  |  |  |
Proceeds from Sale of Productive Assets |  |  |  | $ 4,000 |  |  |  |  |
Disposition of Assets, Consideration Transferred, Shares Received | shares |  |  |  | 2.5 |  |  |  |  |
Gain on sale of assets and investments |  |  |  | $ 1,900 |  |  |  |  |
McEwen Mining Inc, El Gallo, Magistral Mine [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount |  |  |  |  |  |  |  |  | $ 6,300
Disposition of Assets, Contingent Consideration, Asset |  |  |  |  |  |  |  |  | $ 1,000
La Cigarra [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Net smelter return paid (as a percent) |  |  | 2.50% |  |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount |  |  | $ 3,600 |  |  |  |  |  |
Proceeds from Sale of Productive Assets |  |  | $ 500 |  |  |  |  |  |
Disposition of Assets, Consideration Transferred, Shares Received | shares |  |  | 9.6 |  |  |  |  |  |
Gain on sale of assets and investments |  |  | $ 0 |  |  |  |  |  |
Martha [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount |  | $ 3,000 |  |  |  |  |  |  |
Proceeds from Sale of Productive Assets |  | 1,500 |  |  |  |  |  |  |
Disposition of Assets, Receivable, Asset |  | 1,500 |  |  |  |  |  |  |
Gain on sale of assets and investments |  | $ 5,300 |  |  |  |  |  |  |
Correnso [Member] |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount | $ 5,400 |  |  |  |  |  |  |  |
Gain on sale of assets and investments | 4,700 |  |  |  |  |  |  |  |
Disposition of Assets, Contingent Consideration, Asset | $ 700 |  |  |  |  |  |  |  |
Subsequent Event [Member] | 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 |  |  |  |  |  |  |  | $ 25,000 |

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