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Note Q - Quarterly Financial Data (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Sep. 30, 2017		Jun. 24, 2017		Mar. 25, 2017		Dec. 24, 2016		Sep. 24, 2016		Jun. 25, 2016		Mar. 26, 2016		Dec. 26, 2015		Sep. 30, 2017	Sep. 24, 2016		Sep. 26, 2015
Revenue, Net	$ 316,726		$ 295,415		$ 246,513		$ 225,570		$ 262,240		$ 277,981		$ 229,710		$ 222,850		$ 1,084,224	$ 992,781		$ 976,256
Gross Profit	97,547		94,764		72,817		65,895		79,797		92,086		68,749		63,835		331,023	304,467		300,890
Net Earnings	$ 24,343		$ 25,304		$ 15,987		$ 13,540		$ 20,618		$ 26,791		$ 15,588		$ 12,978		$ 79,174	$ 75,975		$ 70,183
Net Income available to common stockholders plus assumed conversions (in dollars per share)	$ 1.29	[1]	$ 1.34	[1]	$ 0.85	[1]	$ 0.72	[1]	$ 1.10	[1]	$ 1.43	[1]	$ 0.83	[1]	$ 0.69	[1]	$ 4.21	$ 4.05	[1]	$ 3.73
[1] Total of quarterly amounts do not necessarily agree to the annual report amounts due to separate quarterly calculations of weighted average shares outstanding.

X

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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