Commitments and Contigencies (Details Textual) (USD $)	3 Months Ended				3 Months Ended			3 Months Ended			0 Months Ended	1 Months Ended
	Mar. 31, 2014 oz	Jun. 30, 2013	Oct. 14, 2009 m	Jan. 21, 2009	Mar. 31, 2014 Rochester [Member]	Mar. 31, 2013 Rochester [Member]	Jul. 07, 1995 Echo Bay [Member] oz	Mar. 31, 2014 Kensington [Member]	Jul. 07, 1995 Kensington [Member]	Jul. 07, 1995 Coeur Alaska Inc [Member]	Jun. 05, 2012 Hazardous Waste On-Site [Member] Callahan Mining Corporation [Member] defendant	Feb. 28, 2010 Hazardous Waste On-Site [Member] Callahan Mining Corporation [Member]
Commitment and Contingencies (Textual) [Abstract]
Acquisition of ownership interest							50.00%		100.00%
Volume related to net smelter return royalty of future gold production							1,000,000
Purchase price and construction and development expenses										$ 32,500,000
Minimum royalty range for gold price per ounce								1.00%
Gold price per ounce for minimum royalty range								400
Maximum royalty range for gold price per ounce					5.00%			2.50%
Maximum royalty payable					250,000
Gold price per ounce for maximum royalty range					23.60			475
Royalty expenses					0	1,000,000
Litigation Settlement, Amount												3,500,000
Number of defendants											5
Maximum Height for Temporary Restriction on Mining			4,400
NSR royalty percentage		3.40%
NSR royalty maximum amount		$ 39,400,000
Number of labor agreements in South America	1
Percentage of labor force covered by collective bargaining agreements	9.90%
Royalty to be capped in terms of ounces of production	1,000,000
Purchased royalty				50.00%
Royalty agreement minimum obligation for the period	400,000
Royalty Agreement Minimum Obligation for Per Month	4,167
Royalty Agreement Period				8 years