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Income (Loss) Per Share (Details Textual) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount 2.2   0.8 2.2
Employee Stock Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount 3.4 1.4 2.6 1.4