Commitment and Contigencies (Details Textual) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended
	Sep. 30, 2013 oz m	Sep. 30, 2012	Sep. 30, 2013 oz m	Sep. 30, 2012	Jan. 21, 2009	Sep. 30, 2013 Rochester [Member]	Mar. 31, 2012 Rochester [Member]	Sep. 30, 2013 Rochester [Member]	Sep. 30, 2012 Rochester [Member]	Jul. 07, 1995 Echo Bay [Member] oz	Sep. 30, 2013 Kensington [Member]	Jul. 07, 1995 Kensington [Member]	Jul. 07, 1995 Coeur Alaska Inc [Member]	Sep. 30, 2013 Palmarejo gold production royalty [Member] oz
Business Acquisition [Line Items]
Bolivian Mining Elevation Restriction	4,400		4,400
One-Time Cash Payment for Mining Claim Settlement			$ 10,000,000
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%
Gold price per ounce for maximum royalty range						23.60					475
Royalty expenses						0	800,000	1,000,000	2,000,000
Further Payment Made on Number of Additional Ounces of Gold	156,493,000		156,493,000											156,493,000
NSR royalty percentage	3.40%
NSR royalty maximum amount	39,400,000
Gain (Loss) Related to Litigation Settlement	0	0	(32,046,000)	0
Mexican Import Tax Potential Settlement	$ 1,800,000
Additional Commitment and Contingencies (Textual) [Abstract]
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