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Investments (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Investments (Textual) [Abstract]        
Other than temporary impairment losses $ 2,000 $ 0 $ 2,000 $ 0