Stock-based Compensation (Schedule of Classification of Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Apr. 04, 2015	Mar. 29, 2014
Total stock-based compensation expense	$ 12,822	$ 12,566	$ 24,064	$ 25,330
Cost of License Revenue
Total stock-based compensation expense	118	82	260	147
Cost of Service Revenue
Total stock-based compensation expense	1,504	1,349	3,193	2,886
Cost of Support Revenue
Total stock-based compensation expense	989	889	1,765	1,813
Sales and Marketing
Total stock-based compensation expense	3,081	3,019	5,953	5,518
Research and Development
Total stock-based compensation expense	3,001	2,147	6,087	4,836
General and Administrative
Total stock-based compensation expense	$ 4,129	$ 5,080	$ 6,806	$ 10,130