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Fair Value Measurements (Details Textual) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) $ / oz | Dec. 31, 2014 USD ($) $ / oz | Sep. 30, 2016 | Apr. 19, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Long-Lived Assets, Impairment Testing, Commodity, Silver, Price per Ounce | $ / oz |  | 17.50 | 19.00 |  |
Write-downs | $ 4,446 | $ 313,337 | $ 1,472,721 |  |
Impairment of Long-Lived Assets Held-for-use, Net of Tax | $ 3,900 | $ 276,500 | $ 1,021,800 |  |
Long-Lived Assets, Impairment Testing, Commodity, Gold, Price per Ounce | $ / oz |  | 1,200 | 1,275 |  |
Rochester [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Expected Royalty Duration | 1.66 |  |  |  |
Convertible Senior Notes Due March 2028 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.25% | 3.25% |  | 3.25% |
Senior Notes due 2021 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.875% | 7.875% |  |  |
Short Term Credit Agreement [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Unamortized debt issuance expense |  | $ 5,000 |  |  |
Senior Notes due 2021 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net | $ 2,000 | $ 5,300 |  |  |
McEwen Mining Inc, El Gallo, Magistral Mine [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [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

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