Summary of Significant Accounting Policies (Details Textuals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Impact to Expected Annual Tax Rate related to adopting ASU 2016-09		2.00%
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle	$ 1,539
Summary of Significant Accounting Policies (Textuals) [Abstract]
Amortization expense	2,500	$ 1,800
Future Amortization Expense Current Year	9,800
Aggregate amortization expense for 2016	9,600
Aggregate amortization expense for 2017	9,200
Aggregate amortization expense for 2018	8,800
Aggregate amortization expense for 2019	8,200
Aggregate amortization expense for 2020	7,200
Purchased Intangible Amortization, Gross	2,300	1,700
Purchased intangible amortization, net of tax	1,500	1,100
Amortization expense associated with capitalized software	$ 7,500	6,600
Standard Warranty Period	one
Share - based compensation expense	$ 3,800	$ 3,700
Unamortized Debt Issuance Expense	$ 1,591
Impact to the Quarterly Tax Rate related to the adoption of ASU 2016-09		5.00%