Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Sep. 30, 2017		19,041
Balance at Sep. 30, 2017		$ 19,041	$ 69,817	$ 135,851	$ (1,333)	$ 223,376
Net earnings				36,266		36,266
Other comprehensive (loss) income	[1]				139	$ 139
Stock options exercised (in shares)		143				196
Stock options exercised		$ 143	1,938			$ 2,081
Vesting of restricted stock units (in shares)		39
Vesting of restricted stock units		$ 39	(39)
Compensation expense associated with stock-based plans			2,078			2,078
Restricted stock units and stock options surrendered for withholding taxes payable			(942)			(942)
Reclassification of stranded tax effects				300	(300)	0
Cash dividends declared				(21,333)		(21,333)
Balance (in shares) at Sep. 29, 2018		19,223
Balance at Sep. 29, 2018		$ 19,223	72,852	151,084	(1,494)	241,665
Net earnings				5,598		5,598
Other comprehensive (loss) income	[1]				(754)	$ (754)
Stock options exercised (in shares)						5
Vesting of restricted stock units (in shares)		38
Vesting of restricted stock units		$ 38	(38)			$ 0
Compensation expense associated with stock-based plans			2,057			2,057
Restricted stock units and stock options surrendered for withholding taxes payable			(239)			(239)
Cash dividends declared				(2,310)		(2,310)
Balance (in shares) at Sep. 28, 2019		19,261
Balance at Sep. 28, 2019		$ 19,261	74,632	154,372	(2,248)	246,017
Net earnings				19,009		19,009
Other comprehensive (loss) income	[1]				292	292
Vesting of restricted stock units (in shares)		43
Vesting of restricted stock units		$ 43	(43)			0
Compensation expense associated with stock-based plans			2,028			2,028
Restricted stock units and stock options surrendered for withholding taxes payable			(230)			(230)
Cash dividends declared				(2,313)		(2,313)
Balance (in shares) at Oct. 03, 2020		19,304
Balance at Oct. 03, 2020		$ 19,304	$ 76,387	$ 171,068	$ (1,956)	$ 264,803

[1] Activity within accumulated other comprehensive income (loss) is reported net of related income taxes: 2018 ($44), 2019 $239 and 2020 ($93).