Stock-based Compensation (Schedule of Classification of Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Total stock-based compensation expense			$ 56,139	$ 51,821
License and Subscription Cost [Member]
Total stock-based compensation expense	$ 347	$ 195	954	552
Maintenance Costs [Member]
Total stock-based compensation expense	1,139	963	3,638	3,611
Cost of professional service revenue
Total stock-based compensation expense	1,505	1,342	4,500	4,072
Sales and Marketing
Total stock-based compensation expense	3,296	3,195	11,047	11,254
Research and Development
Total stock-based compensation expense	2,805	2,531	9,753	7,578
General and Administrative
Total stock-based compensation expense	7,482	5,570	26,247	24,754
Share-based Compensation Expense Total [Member]
Total stock-based compensation expense	16,574	13,796	56,139	$ 51,821
stock modification [Member]
Total stock-based compensation expense		$ 10,000
ESPP [Member]
Total stock-based compensation expense	$ 900		$ 2,200