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Other Investments (Summary Of Financial Information For Midas) (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Total current assets $ 14,652,000   $ 14,652,000   $ 9,844,000  
Total non-current assets 23,152,000   23,152,000   43,250,000  
Total current liabilities 3,569,000   3,569,000   1,222,000  
Total non-current liabilities         8,859,000  
Total equity 34,235,000   34,235,000   43,013,000 101,343,000
Operating expense (1,108,000) (3,523,000) (6,333,000) (20,207,000)    
Net Income (loss) (4,908,000) (3,027,000) (8,967,000) (51,448,000) (59,488,000)  
Midas Gold Corp [Member]
            
Total current assets 14,742,000   14,742,000      
Total non-current assets 186,673,000   186,673,000      
Total current liabilities 2,432,000   2,432,000      
Total non-current liabilities 919,000   919,000      
Total equity 198,064,000   198,064,000      
Operating expense     3,908,000   3,107,000  
Net Income (loss)     $ 3,796,000   $ 3,085,000