Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock Including Additional Paid in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Sep. 26, 2020	18,915,000
Balance at Sep. 26, 2020	$ 49,268	$ (15,587)	$ 775,817	$ 809,498
Issuance of common stock upon exercise of stock options (in shares)	158,000
Issuance of common stock upon exercise of stock options	$ 18,739	0	0	18,739
Issuance of common stock for employee stock purchase plan (in shares)	11,000
Issuance of common stock for employee stock purchase plan	$ 1,391	0	0	1,391
Foreign currency translation adjustment	0	2,204	0	2,204
Dividends declared	0	0	(45,984)	(45,984)
Share-based compensation	4,199	0	0	4,199
Net Earnings	$ 0	0	55,607	55,607
Balance (in shares) at Sep. 25, 2021	19,084,000
Balance at Sep. 25, 2021	$ 73,597	(13,383)	785,440	845,654
Issuance of common stock upon exercise of stock options (in shares)	119,000
Issuance of common stock upon exercise of stock options	$ 14,124	0	0	14,124
Issuance of common stock for employee stock purchase plan (in shares)	16,000
Issuance of common stock for employee stock purchase plan	$ 2,036	0	0	2,036
Foreign currency translation adjustment	0	(330)	0	(330)
Dividends declared	0	0	(49,819)	(49,819)
Share-based compensation	4,269	0	0	4,269
Net Earnings	$ 0	0	47,235	$ 47,235
Balance (in shares) at Sep. 24, 2022	19,219,000			19,219,000
Balance at Sep. 24, 2022	$ 94,026	(13,713)	782,856	$ 863,169
Issuance of common stock upon exercise of stock options (in shares)	96,000
Issuance of common stock upon exercise of stock options	$ 13,111	0	0	13,111
Issuance of common stock for employee stock purchase plan (in shares)	17,000
Issuance of common stock for employee stock purchase plan	$ 2,101	0	0	2,101
Foreign currency translation adjustment	0		0	3,547
Dividends declared	0		(54,634)	(54,634)
Share-based compensation	5,318	0	0	5,318
Net Earnings	$ 0	0	78,906	$ 78,906
Balance (in shares) at Sep. 30, 2023	19,332,000			19,332,000
Balance at Sep. 30, 2023	$ 114,556	$ (10,166)	$ 807,128	$ 911,518