Stockholders' Equity And Stock-Based Compensation (Stock Repurchase) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Sep. 25, 2015	Jun. 26, 2015	Mar. 27, 2015	Dec. 26, 2014	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013	Oct. 31, 2014	Feb. 29, 2012	Jul. 31, 2011	Jul. 31, 2010	Nov. 30, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount	$ 1,100,000				$ 1,100,000							$ 250,000
Shares repurchased (in shares)	1,769,399	390,000	390,000	389,500	2,938,899
Cost	$ 59,393	$ 15,592	$ 15,411	$ 16,953	$ 107,349	$ 56,028	$ 82,245
Average Price Paid per Share (in dollars per share)	$ 33.55	$ 39.96	$ 39.47	$ 43.51	$ 33.55
Additional Stock Approved [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount								$ 200,000	$ 100,000	$ 250,000	$ 300,000