Summary of Significant Accounting Policies (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Summary of Significant Accounting Policies (Textuals) [Abstract]
Amortization expense	$ 1.6		$ 3.1	$ 3.2
Future Amortization Expense Current Year			6.1
Aggregate amortization expense for 2015	5.7		5.7
Aggregate amortization expense for 2016	5.3		5.3
Aggregate amortization expense for 2017	5.0		5.0
Aggregate amortization expense for 2018	4.7		4.7
Aggregate amortization expense for 2019	4.5		4.5
Purchased Intangible Amortization, Gross	1.4	$ 1.4	2.8	2.7
Purchased intangible amortization, net of tax	0.9	1.0	1.9	1.9
Amortization expense associated with capitalized software	6.0	5.6	$ 11.9	11.2
Standard Warranty Period
Share - based compensation expense	$ 3.5	$ 3.3	$ 7.0	$ 6.5