Acquisition of Joaquin Mineral Interests (Details Textual) (Joaquin Project - Argentina [Member], USD $)	Dec. 21, 2012	Dec. 20, 2012
Joaquin Project - Argentina [Member]
Business Acquisition [Line Items]
Shares of Coeur common stocked exchanged for acquisition	$ 1,300,000
Cash payment made for acquisition	30,000,000
Liabilities assumed	$ 100,000
Ownership interest percentage before acquisition		51.00%