Note P - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Information (USD $)	12 Months Ended
	Sep. 28, 2013		Sep. 29, 2012		Sep. 24, 2011
Note P - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Information [Line Items]
Net sales	$ 867,683,000		$ 830,796,000		$ 744,071,000
Gross profit	263,302,000		250,185,000		229,774,000
Net earnings	64,381,000		54,118,000		55,063,000
Net earnings per diluted share (in Dollars per share)	$ 3.41	[1]	$ 2.86	[1]	$ 2.93
1st Quarter [Member]
Note P - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Information [Line Items]
Net sales	191,408,000		172,686,000
Gross profit	54,135,000		46,406,000
Net earnings	10,226,000		5,485,000
Net earnings per diluted share (in Dollars per share)	$ 0.54	[1]	$ 0.29	[1]
2nd Quarter [Member]
Note P - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Information [Line Items]
Net sales	201,326,000		189,554,000
Gross profit	58,151,000		53,987,000
Net earnings	12,660,000		10,423,000
Net earnings per diluted share (in Dollars per share)	$ 0.67	[1]	$ 0.55	[1]
3rd Quarter [Member]
Note P - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Information [Line Items]
Net sales	237,036,000		226,335,000
Gross profit	75,322,000		72,507,000
Net earnings	21,172,000		18,672,000
Net earnings per diluted share (in Dollars per share)	$ 1.12	[1]	$ 0.99	[1]
4th Quarter [Member]
Note P - Quarterly Financial Data (Unaudited) (Details) - Quarterly Financial Information [Line Items]
Net sales	237,913,000		242,221,000
Gross profit	75,694,000		77,285,000
Net earnings	$ 20,323,000		$ 19,538,000
Net earnings per diluted share (in Dollars per share)	$ 1.08	[1]	$ 1.03	[1]

[1] Total of quarterly amounts do not necessarily agree to the annual report amounts due to separate quarterly calculations of weighted average shares outstanding.