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Other Investments (Summary Of Financial Information For Midas) (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Total current assets $ 19,075,000   $ 19,075,000   $ 9,844,000  
Total non-current assets 25,530,000   25,530,000   43,250,000  
Total current liabilities 4,841,000   4,841,000   1,222,000  
Total non-current liabilities         8,859,000  
Total equity 39,764,000   39,764,000   43,013,000 101,343,000
Operating expense (2,315,000) (7,369,000) (5,225,000) (16,684,000)    
Net Income (loss) (2,919,000) (21,015,000) (4,059,000) (48,421,000) (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   2,268,000  
Net Income (loss)     $ 3,796,000   $ 2,337,000