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Investment in Global (Details Narrative) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Ownership percentage of Global's outstanding shares 35.46%   35.46%   34.51%
Foreign currency translation adjustment during period $ (652) $ 963 $ (137) $ (331)  
Unrealized gain (loss) on investments during period (7,089) 4,903 (10,146) (3,501)  
Cumulative unrealized gain (loss) (1,463)   (1,463)   8,820
Cost of Global shares purchased during the period     422 32  
Investment in Global
         
Shares of Global purchased during the period     343,000    
Cost of Global shares purchased during the period     $ 422