Stock-based Compensation (Schedule of Classification of Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Total stock-based compensation expense	$ 29,407	$ 18,331
License cost [Member]
Total stock-based compensation expense	322	(90)
Cost of support and cloud services revenue
Total stock-based compensation expense	975	1,311
Cost of professional services revenue
Total stock-based compensation expense	1,814	1,706
Sales and marketing
Total stock-based compensation expense	9,722	4,879
Research and development
Total stock-based compensation expense	4,900	2,960
General and administrative
Total stock-based compensation expense	$ 11,674	$ 7,565