Stockholders' Equity And Stock-Based Compensation (RSU Vest Date Fair Value) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 25, 2015	Sep. 26, 2014
Stockholders' Equity And Stock-Based Compensation [Abstract]
Document Period End Date	Sep. 30, 2016
Restricted stock units - vest date fair value	$ 40,283	$ 45,175	$ 40,810