Stock-based Compensation (Schedule of Classification of Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Apr. 04, 2015	Apr. 02, 2016	Apr. 04, 2015
Total stock-based compensation expense	$ 14,836		$ 12,822	$ 38,025	$ 24,064
Cost of software revenue
Total stock-based compensation expense	1,100		1,107	3,005	2,025
Cost of professional service revenue
Total stock-based compensation expense	1,279		1,504	2,730	3,193
Sales and Marketing
Total stock-based compensation expense	3,777		3,545	8,059	6,746
Research and Development
Total stock-based compensation expense	2,534		3,001	5,047	6,087
General and Administrative
Total stock-based compensation expense	$ 6,146		$ 3,665	$ 19,184	$ 6,013
stock modification [Member]
Total stock-based compensation expense		$ 10,000