Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Oct. 02, 2021	19,408,000
Balance at Oct. 02, 2021	$ 19,408,000	$ 78,688,000	$ 206,384,000	$ (2,442,000)	$ 302,038,000
Net earnings			23,129,000		23,129,000
Stock options exercised, net (in shares)	6,000
Stock options exercised, net	$ 6,000	40,000			46,000
Compensation expense associated with stock-based plans		272,000			272,000
Cash dividends declared			(39,410,000)		(39,410,000)
Restricted stock units and stock options surrendered for withholding taxes payable		(55,000)			(55,000)
Balance (in shares) at Jan. 01, 2022	19,414,000
Balance at Jan. 01, 2022	$ 19,414,000	78,945,000	190,103,000	(2,442,000)	286,020,000
Balance (in shares) at Oct. 02, 2021	19,408,000
Balance at Oct. 02, 2021	$ 19,408,000	78,688,000	206,384,000	(2,442,000)	302,038,000
Net earnings					$ 100,705,000
Repurchases of common stock (in shares)					0
Balance (in shares) at Jul. 02, 2022	19,506,000
Balance at Jul. 02, 2022	$ 19,506,000	81,349,000	266,511,000	(2,442,000)	$ 364,924,000
Balance (in shares) at Jan. 01, 2022	19,414,000
Balance at Jan. 01, 2022	$ 19,414,000	78,945,000	190,103,000	(2,442,000)	286,020,000
Net earnings			39,017,000		39,017,000
Compensation expense associated with stock-based plans		830,000			830,000
Cash dividends declared			(583,000)		(583,000)
Vesting of restricted stock units (in shares)	25,000
Vesting of restricted stock units	$ 25,000	(25,000)			0
Restricted stock units and stock options surrendered for withholding taxes payable		(137,000)			(137,000)
Balance (in shares) at Apr. 02, 2022	19,439,000
Balance at Apr. 02, 2022	$ 19,439,000	79,613,000	228,537,000	(2,442,000)	325,147,000
Net earnings			38,559,000		38,559,000
Stock options exercised, net (in shares)	67,000
Stock options exercised, net	$ 67,000	1,537,000			1,604,000
Compensation expense associated with stock-based plans		293,000			$ 293,000
Repurchases of common stock (in shares)					0
Cash dividends declared			(585,000)		$ (585,000)
Restricted stock units and stock options surrendered for withholding taxes payable		(94,000)			(94,000)
Balance (in shares) at Jul. 02, 2022	19,506,000
Balance at Jul. 02, 2022	$ 19,506,000	81,349,000	266,511,000	(2,442,000)	364,924,000
Balance (in shares) at Oct. 01, 2022	19,478,000
Balance at Oct. 01, 2022	$ 19,478,000	81,997,000	289,246,000	(977,000)	389,744,000
Net earnings			11,123,000		11,123,000
Stock options exercised, net (in shares)	5,000
Stock options exercised, net	$ 5,000	89,000			94,000
Compensation expense associated with stock-based plans		130,000			130,000
Repurchases of common stock (in shares)	(32,000)
Repurchases of common stock	$ (32,000)	(134,000)	(750,000)		(916,000)
Cash dividends declared			(39,501,000)		(39,501,000)
Balance (in shares) at Dec. 31, 2022	19,451,000
Balance at Dec. 31, 2022	$ 19,451,000	82,082,000	260,118,000	(977,000)	360,674,000
Balance (in shares) at Oct. 01, 2022	19,478,000
Balance at Oct. 01, 2022	$ 19,478,000	81,997,000	289,246,000	(977,000)	389,744,000
Net earnings					$ 26,789,000
Stock options exercised, net (in shares)					12,000
Repurchases of common stock (in shares)					(80,352)
Repurchases of common stock					$ (2,300,000)
Balance (in shares) at Jul. 01, 2023	19,433,000
Balance at Jul. 01, 2023	$ 19,433,000	83,150,000	273,460,000	(977,000)	375,066,000
Balance (in shares) at Dec. 31, 2022	19,451,000
Balance at Dec. 31, 2022	$ 19,451,000	82,082,000	260,118,000	(977,000)	360,674,000
Net earnings			5,101,000		5,101,000
Compensation expense associated with stock-based plans		983,000			983,000
Repurchases of common stock (in shares)	(34,000)
Repurchases of common stock	$ (34,000)	(146,000)	(829,000)		(1,009,000)
Cash dividends declared			(584,000)		(584,000)
Vesting of restricted stock units (in shares)	24,000
Vesting of restricted stock units	$ 24,000	(24,000)			0
Restricted stock units and stock options surrendered for withholding taxes payable		(187,000)			(187,000)
Balance (in shares) at Apr. 01, 2023	19,441,000
Balance at Apr. 01, 2023	$ 19,441,000	82,708,000	263,806,000	(977,000)	364,978,000
Net earnings			10,565,000		10,565,000
Stock options exercised, net (in shares)	6,000
Stock options exercised, net	$ 6,000	91,000			97,000
Compensation expense associated with stock-based plans		421,000			$ 421,000
Repurchases of common stock (in shares)	(14,000)				(14,239)
Repurchases of common stock	$ (14,000)	(61,000)	(328,000)		$ (403,000)
Cash dividends declared			(583,000)		(583,000)
Restricted stock units and stock options surrendered for withholding taxes payable		(9,000)			(9,000)
Balance (in shares) at Jul. 01, 2023	19,433,000
Balance at Jul. 01, 2023	$ 19,433,000	$ 83,150,000	$ 273,460,000	$ (977,000)	$ 375,066,000