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Comprehensive Income (Loss) (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Comprehensive Income Loss [Line Items]        
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total $ (4.2) $ (2.6) $ (10.6) $ 7.5