Stockholders' Equity And Stock-Based Compensation (Stock Repurchase) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Jun. 30, 2017	Jul. 01, 2016
Stockholders' Equity And Stock-Based Compensation [Abstract]
Shares repurchased (in shares)	485,179	519,917	531,465	1,536,561
Cost	$ 24,994	$ 24,999	$ 25,001	$ 74,994	$ 84,854
Average Price Paid per Share (in dollars per share)	$ 51.50	$ 48.07	$ 47.02	$ 51.50