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Summary of Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016
Effective Income Tax Rate Reconciliation, Percent | 22.00% |  |  | 22.00% | 22.00% |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |  |  |  |  |
Amortization expense | $ 2.5 | $ 1.7 |  |  |  | $ 5.0 | $ 3.5
Future Amortization Expense Current Year |  |  |  |  |  | 9.9 |
Aggregate amortization expense for 2018 | 9.7 |  | $ 9.7 | $ 9.7 | $ 9.7 | 9.7 |
Aggregate amortization expense for 2019 | 9.2 |  | 9.2 | 9.2 | 9.2 | 9.2 |
Aggregate amortization expense for 2020 | 8.9 |  | 8.9 | 8.9 | 8.9 | 8.9 |
Aggregate amortization expense for 2021 | 8.3 |  | 8.3 | 8.3 | 8.3 | 8.3 |
Aggregate amortization expense for 2022 | 7.3 |  | $ 7.3 | $ 7.3 | $ 7.3 | 7.3 |
Purchased Intangible Amortization, Gross | 2.3 | 1.5 |  |  |  | 4.6 | 3.2
Purchased intangible amortization, net of tax | 1.5 | 1.0 |  |  |  | 3.0 | 2.1
Amortization expense associated with capitalized software | 7.7 | 6.9 |  |  |  | 15.2 | 13.4
Standard Warranty Period |  |  | one |  |  |  |
Share - based compensation expense | $ 3.9 | $ 3.6 |  |  |  | 7.8 | $ 7.2
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. | 4.00% |  |  |  | 5.00% |  |
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 |  |  |  |  |  | $ 11.2 |

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