Mineral Properties (Policies)	12 Months Ended
Dec. 31, 2015
Policies
Mineral Properties	Mineral Properties Significant payments related to the acquisition of mineral properties, mineral rights, and mineral leases are capitalized. If a commercially mineable ore body is discovered, such costs are amortized when production begins using the units-of-production method based on proven and probable reserves. If no commercially mineable ore body is discovered, or such rights are otherwise determined to have no value, such costs are expensed in the period in which it is determined the property has no future economic value.

Mineral Properties (Policies)

12 Months Ended

Dec. 31, 2015

Significant payments related to the acquisition of mineral properties, mineral rights, and mineral leases are capitalized.

If a commercially mineable ore body is discovered, such costs are amortized when production begins using the units-of-production method based on proven and probable reserves. If no commercially mineable ore body is discovered, or such rights are otherwise determined to have no value, such costs are expensed in the period in which it is determined the property has no future economic value.