Write-Downs (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 19, 2016
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use, Net of Tax			$ 3,900
Impairment of Long-Lived Assets Held-for-use	$ 0	$ 0	4,446
Endeavor [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Long-Lived Assets Held-for-use			2,500
McEwen Mining Inc, El Gallo, Magistral Mine [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Transfer of financial assets accounted for as sales, amount				$ 6,300
Disposition of Assets, Contingent Consideration, Asset				$ 1,000
Impairment of Long-Lived Assets Held-for-use			$ 1,900