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Income Taxes (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Business Acquisition [Line Items]      
Annual effective tax rate 43.50% 39.30%  
Statutory income tax rate 35.00%   35.00%
Unrecognized tax benefits $ 10.2   $ 7.2
Accrued interest and penalties $ 1.3   $ 0.2
Avantec      
Business Acquisition [Line Items]      
Gain on business combination   $ 3.4  
Percentage of minority interest   15.00%  
Percentage of interest acquired   85.00%