Note L - Stock Options - Nonqualified Stock Options by Excercise Price Range (Details) - Non-qualified Stock Options [Member] - $ / shares	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Options outstanding (in shares)	332,269	311,514	311,884	297,941
Options oustanding, weighted-average remaining contractual life (Year)	4 years 219 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 105.66	$ 92.58	$ 75.56	$ 63.34
Options exercisable (in shares)	155,680
Options exercisable, weighted-average exercise price (in dollars per share)	$ 79.35
Exercise Price Range 1 [Member]
Range of exercise price, lower limit (in dollars per share)	41.75
Range of exercise price, upper limit (in dollars per share)	$ 57.33
Options outstanding (in shares)	60,000
Options oustanding, weighted-average remaining contractual life (Year)	2 years 328 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 48.89
Options exercisable (in shares)	60,000
Options exercisable, weighted-average exercise price (in dollars per share)	$ 48.89
Exercise Price Range 2 [Member]
Range of exercise price, lower limit (in dollars per share)	80.79
Range of exercise price, upper limit (in dollars per share)	$ 119.44
Options outstanding (in shares)	154,400
Options oustanding, weighted-average remaining contractual life (Year)	4 years 109 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 103.73
Options exercisable (in shares)	95,680
Options exercisable, weighted-average exercise price (in dollars per share)	$ 98.45
Exercise Price Range 3 [Member]
Range of exercise price, lower limit (in dollars per share)	129.26
Range of exercise price, upper limit (in dollars per share)	$ 150.89
Options outstanding (in shares)	117,869
Options oustanding, weighted-average remaining contractual life (Year)	5 years 292 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 137.07
Options exercisable (in shares)
Options exercisable, weighted-average exercise price (in dollars per share)