Stock-based Compensation (Schedule of Classification of Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 03, 2015	Dec. 28, 2013
Total stock-based compensation expense	$ 11,242	$ 12,764
Cost of License Revenue
Total stock-based compensation expense	142	65
Cost of Service Revenue
Total stock-based compensation expense	1,689	1,537
Cost of Support Revenue
Total stock-based compensation expense	776	924
Sales and Marketing
Total stock-based compensation expense	2,872	2,499
Research and Development
Total stock-based compensation expense	3,086	2,689
General and Administrative
Total stock-based compensation expense	$ 2,677	$ 5,050