Stock-based Compensation (Schedule of Classification of Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Total stock-based compensation expense	$ 15,234	$ 16,658	$ 71,608	$ 52,015
Sales and marketing
Total stock-based compensation expense	5,870	4,910	25,114	14,827
Research and development
Total stock-based compensation expense	4,761	3,283	14,851	9,626
General and administrative
Total stock-based compensation expense	2,039	6,046	22,856	19,449
License | Cost of Sales [Member]
Total stock-based compensation expense	78	(46)	448	(30)
Support and cloud services | Cost of Sales [Member]
Total stock-based compensation expense	1,141	994	3,274	3,297
Professional services | Cost of Sales [Member]
Total stock-based compensation expense	$ 1,345	$ 1,471	$ 5,065	$ 4,846