Quarterly Financial Data (Schedule Of Quarterly Financial Data) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Earnings per Share, Diluted [Line Items]
Earnings Per Share, Diluted	$ 0.77	$ 0.71	$ 0.53	$ 0.51	$ 0.71	$ 0.68	$ 0.52	$ 0.47	$ 2.52	$ 2.36	$ 1.75
Revenue, Net	$ 666,223	$ 620,505	$ 557,616	$ 533,905	$ 567,730	$ 571,945	$ 557,824	$ 530,532	$ 2,378,249	$ 2,228,031	$ 2,306,732
Gross Profit	62,639	58,593	52,835	51,502	54,529	55,473	52,021	51,162	225,569	213,185	219,913
Net income	$ 26,450	$ 24,584	$ 18,516	$ 17,663	$ 24,464	$ 23,204	$ 17,975	$ 16,616	$ 87,213	$ 82,259	$ 62,089
Earnings Per Share, Basic	$ 0.78	$ 0.73	$ 0.55	$ 0.52	$ 0.73	$ 0.69	$ 0.52	$ 0.48	$ 2.58	$ 2.40	$ 1.78