Quarterly Data - Unaudited Net Sales And Earnings (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Interim Period, Costs Not Allocable [Line Items]
Net sales	$ 675,853	$ 670,632	$ 643,023	$ 620,803	$ 632,727	$ 611,221	$ 624,970	$ 600,618	$ 2,610,311	$ 2,469,536	$ 2,330,680
Gross profit	195,358	198,269	197,423	192,700	192,321	183,418	184,430	185,135	783,750	745,304	679,477
Net earnings	$ 15,625	$ 34,227	$ 36,527	$ 34,118	$ 41,797	$ 38,871	$ 35,421	$ 36,373	$ 120,497	$ 152,462	$ 136,021
Net earnings per share, Basic	$ 0.34	$ 0.76	$ 0.81	$ 0.75	$ 0.92	$ 0.86	$ 0.78	$ 0.80	$ 2.66	$ 3.37	$ 2.99
Net earnings per share, Diluted	$ 0.34	$ 0.75	$ 0.80	$ 0.75	$ 0.91	$ 0.85	$ 0.77	$ 0.80	$ 2.63	$ 3.33	$ 2.95