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

The aggregate expense charged against earnings to amortize the cost of acquired intangible assets.

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The amount of amortization expense expected to be recognized during the current year.

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Impact to the Expected Annual Tax Rate related to adopting ASU 2016-09 for the year.

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Impact to the Estimated Annual Tax Rate related to the adoption of ASU 2016-09.

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The aggregate expense charged against earnings to amortize the cost of acquired intangible assets before tax.

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Disclosure of standard warranty period.

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Summary of Significant Accounting Policies.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of expense for amortization of capitalized computer software costs.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of cumulative tax effect on beginning retained earnings from change in accounting principle.

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