Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Share-based compensation expense and allocation by cost [Line Items]
Stock-based compensation expense	$ 46,907	$ 44,257	$ 93,389	$ 86,510
Cost of product and maintenance
Share-based compensation expense and allocation by cost [Line Items]
Stock-based compensation expense	683	652	1,374	1,333
Cost of services
Share-based compensation expense and allocation by cost [Line Items]
Stock-based compensation expense	869	829	1,749	1,695
Marketing and sales
Share-based compensation expense and allocation by cost [Line Items]
Stock-based compensation expense	10,116	9,509	20,127	18,615
Research and development
Share-based compensation expense and allocation by cost [Line Items]
Stock-based compensation expense	29,690	27,659	59,036	54,557
General and administrative
Share-based compensation expense and allocation by cost [Line Items]
Stock-based compensation expense	$ 5,549	$ 5,608	$ 11,103	$ 10,310