Commitments and Contigencies (Details Textual) (USD $)	0 Months Ended		12 Months Ended		0 Months Ended	1 Months Ended	12 Months Ended
	May 27, 2014	Jan. 21, 2009	Dec. 31, 2014 oz	Dec. 31, 2013	Jun. 05, 2012 defendant	Feb. 28, 2010	Dec. 31, 2015	Oct. 02, 2014	Oct. 14, 2009 m
Other Commitments [Line Items]
Litigation Settlement, Expense				$ 32,000,000
Termination payment								2,000,000
Production to be sold, percent								50.00%
Sale of production, price per ounce of gold								800
Commitment and Contingencies (Textual) [Abstract]
Litigation Settlement, Amount				10,000,000
Maximum Height for Temporary Restriction on Mining									4,400
NSR royalty percentage				3.40%
NSR royalty maximum amount				39,400,000
Payments for Royalties	1,800,000		4,000,000
Further Payment Made on Number of Additional Ounces of Gold			35,500,000
Number of labor agreements in South America			1
Percentage of labor force covered by collective bargaining agreements			11.60%
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
Rochester [Member]
Commitment and Contingencies (Textual) [Abstract]
Maximum royalty range for gold price per ounce			5.00%
Maximum royalty payable			250,000
Gold price per ounce for maximum royalty range			23.60
Hazardous Waste On-Site [Member] | Callahan Mining Corporation [Member]
Commitment and Contingencies (Textual) [Abstract]
Litigation Settlement, Amount						3,500,000
Number of defendants					5
Subsequent Event [Member]
Other Commitments [Line Items]
Aggregate deposit to be received							$ 22,000,000