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Summary of Significant Accounting Policies (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Effective Income Tax Rate Reconciliation, Percent 22.00%   22.00%  
Summary of Significant Accounting Policies (Textuals) [Abstract]        
Amortization expense $ 2.9 $ 2.2 $ 7.9 $ 5.8
Future Amortization Expense Current Year     11.4  
Aggregate amortization expense for 2018 13.7   13.7  
Aggregate amortization expense for 2019 13.3   13.3  
Aggregate amortization expense for 2020 12.9   12.9  
Aggregate amortization expense for 2021 12.3   12.3  
Aggregate amortization expense for 2022 11.7   11.7  
Purchased Intangible Amortization, Gross 2.6 2.0 7.2 5.2
Purchased intangible amortization, net of tax 1.7 1.3 4.7 3.5
Amortization expense associated with capitalized software 7.7 6.8 $ 22.9 20.2
Standard Warranty Period     one  
Share - based compensation expense $ 4.0 $ 3.6 $ 11.8 $ 10.9
Impact to Expected Annual Tax Rate related to adopting ASU 2016-09     2.00%  
Impact to the Estimated Annual Tax Rate related to the adoption of ASU 2016-09. 1.00%   3.00%  
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle     $ 1,539.0  
Excess Tax Benefit from Share-based Compensation, Financing Activities     $ 17.2