Commitment and Contigencies (Details Textual) (USD $)	3 Months Ended		12 Months Ended					3 Months Ended	12 Months Ended		15 Months Ended		3 Months Ended			0 Months Ended	1 Months Ended
	Dec. 31, 2013 oz	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 14, 2009 m	Jan. 21, 2009	Dec. 31, 2013 Rochester [Member]	Dec. 31, 2013 Rochester [Member]	Dec. 31, 2011 Rochester [Member]	Dec. 31, 2012 Rochester [Member]	Jul. 07, 1995 Echo Bay [Member] oz	Dec. 31, 2013 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	250,000
Gold price per ounce for maximum royalty range								23.60					475
Royalty expenses									(1,500,000)	2,200,000	3,500,000
Litigation Settlement, Amount																	3,500,000
Number of defendants																5
Maximum Height for Temporary Restriction on Mining						4,400
One-Time Cash Payment for Mining Claim Settlement		10,000,000
NSR royalty percentage		3.40%
NSR royalty maximum amount		39,400,000
Gain (Loss) Related to Litigation Settlement		$ 32,000,000	$ (32,046,000)	$ 0	$ 0
Additional Commitment and Contingencies (Textual) [Abstract]
Number of labor agreements in South America			1
Percentage of labor force covered by collective bargaining agreements	10.40%		10.40%
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