Stock Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Share-based compensation expense and allocation by cost [Line Items]
Share-based Compensation	$ 44,257	$ 40,956	$ 86,510	$ 78,857
Cost of product and maintenance
Share-based compensation expense and allocation by cost [Line Items]
Share-based Compensation	652	606	1,333	1,196
Cost of services
Share-based compensation expense and allocation by cost [Line Items]
Share-based Compensation	829	884	1,695	1,747
Marketing and sales
Share-based compensation expense and allocation by cost [Line Items]
Share-based Compensation	9,509	8,268	18,615	15,882
Research and development
Share-based compensation expense and allocation by cost [Line Items]
Share-based Compensation	27,659	25,100	54,557	48,335
General and administrative
Share-based compensation expense and allocation by cost [Line Items]
Share-based Compensation	$ 5,608	$ 6,098	$ 10,310	$ 11,697