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Income Taxes (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Income Taxes [Line Items]          
U.S. federal statutory tax rate (as a percent) 35.00% 35.00% 35.00% 35.00%  
Unrecognized Tax Benefits $ 0.7   $ 0.7   $ 0.7