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Fair Value Accounting (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Fair Value Inputs, Discount Rate 15.00%  
Mill equipment $ 6,500,000 $ 10,000,000
Estimated life of mine in years 9 years  
Level 3 percentage of fair value assets 32.00%  
Fair Value, Inputs, Level 3 [Member]
   
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Mill equipment 6,500,000 10,000,000
Minimum [Member]
   
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Weighted average gold price per ounce (in dollars per ounce) 832  
Timing of commencement of commercial production 2 years  
Maximum [Member]
   
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Weighted average gold price per ounce (in dollars per ounce) $ 884  
Estimated gold production (in ounces) 615,000  
Timing of commencement of commercial production 4 years