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Note L - Stock Options (Details Textual) - USD ($)	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	454,000
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 9,400,000	$ 6,800,000	$ 10,100,000
Proceeds from Stock Options Exercised	12,700,000	7,400,000	5,800,000
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	$ 1,800,000	$ 1,700,000	$ 3,000,000.0
Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 26.29	$ 23.68	$ 18.84
Non-qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 33.11	$ 31.44	$ 24.82
Employee Stock Purchase Plan [Member]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	12,492	12,763	13,271
Share Price	$ 121.37	$ 119.39	$ 105.85
Share-based Payment Arrangement, Expense	$ 390,000	$ 423,000	$ 363,000

X

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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