CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance, beginning of period (in shares) at Oct. 01, 2021		10,127,200
Balance, beginning of period at Oct. 01, 2021		$ 509	$ 82,899	$ 370,501	$ 7,386	$ (2,790)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				10,856
Dividends declared				(3,005)
Award of non-vested shares (in shares)		34,422
Award of non-vested shares		$ 1	(2)
B to A conversion			(154)			154
Stock-based compensation			1,126
Currency translation adjustment					(423)
Change in pension plans, net of tax					16
Purchase of treasury stock at cost (in shares)		(4,577)
Purchase of treasury stock at cost						(461)
Balance, end of period (in shares) at Dec. 31, 2021		10,157,045
Balance, end of period at Dec. 31, 2021		$ 510	83,869	378,352	6,979	(3,097)
Balance, beginning of period (in shares) at Oct. 01, 2021		10,127,200
Balance, beginning of period at Oct. 01, 2021		$ 509	82,899	370,501	7,386	(2,790)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 34,838
Currency translation adjustment	(3,025)
Balance, end of period (in shares) at Jul. 01, 2022		10,173,098
Balance, end of period at Jul. 01, 2022	484,266	$ 511	86,369	396,290	4,386	(3,290)
Balance, beginning of period (in shares) at Dec. 31, 2021		10,157,045
Balance, beginning of period at Dec. 31, 2021		$ 510	83,869	378,352	6,979	(3,097)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				9,900
Dividends declared				(3,023)
Award of non-vested shares (in shares)		13,493
Award of non-vested shares		$ 1
Stock-based compensation			959
Currency translation adjustment					168
Change in pension plans, net of tax					16
Non-vested stock forfeitures (in shares)		(2,040)
Non-vested stock forfeitures			150			(150)
Purchase of treasury stock at cost (in shares)		(512)
Purchase of treasury stock at cost						(48)
Balance, end of period (in shares) at Apr. 01, 2022		10,167,986
Balance, end of period at Apr. 01, 2022		$ 511	84,978	385,229	7,163	(3,295)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,082			14,082
Dividends declared				(3,021)
Issuance of stock under employee stock purchase plan (shares)		5,112
Issuance of stock under employee stock purchase plan			332
B to A conversion			(2)			2
Stock-based compensation			1,061
Currency translation adjustment	(2,770)				(2,770)
Unrealized gain (loss) on available-for-sale securities, net of tax	0
Change in pension plans, net of tax					(7)
Treasury stock adjustment						3
Balance, end of period (in shares) at Jul. 01, 2022		10,173,098
Balance, end of period at Jul. 01, 2022	484,266	$ 511	86,369	396,290	4,386	(3,290)
Balance, beginning of period (in shares) at Sep. 30, 2022		10,192,051
Balance, beginning of period at Sep. 30, 2022	488,014	$ 512	87,351	402,821	620	(3,290)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				5,879
Dividends declared				(3,126)
Award of non-vested shares (in shares)		56,799
Award of non-vested shares		$ 2	(1,381)			1,379
Stock-based compensation			953
Currency translation adjustment					2,937
Change in pension plans, net of tax					8
Purchase of treasury stock at cost (in shares)		(7,613)
Purchase of treasury stock at cost						(444)
Balance, end of period (in shares) at Dec. 30, 2022		10,241,237
Balance, end of period at Dec. 30, 2022		$ 514	86,923	405,574	3,565	(2,355)
Balance, beginning of period (in shares) at Sep. 30, 2022		10,192,051
Balance, beginning of period at Sep. 30, 2022	488,014	$ 512	87,351	402,821	620	(3,290)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	35,541
Currency translation adjustment	4,462
Balance, end of period (in shares) at Jun. 30, 2023		10,250,949
Balance, end of period at Jun. 30, 2023	520,444	$ 514	87,932	428,927	4,981	(1,910)
Balance, beginning of period (in shares) at Dec. 30, 2022		10,241,237
Balance, beginning of period at Dec. 30, 2022		$ 514	86,923	405,574	3,565	(2,355)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				14,861
Dividends declared				(3,161)
Award of non-vested shares (in shares)		13,674
Award of non-vested shares		$ 0	(744)			744
Stock-based compensation			971
Currency translation adjustment					507
Change in pension plans, net of tax					8
Balance, end of period (in shares) at Mar. 31, 2023		10,254,911
Balance, end of period at Mar. 31, 2023		$ 514	87,150	417,274	4,080	(1,611)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,801			14,801
Dividends declared				(3,148)
Award of non-vested shares (in shares)		6,670
Award of non-vested shares			564			(299)
Stock-based compensation			218
Currency translation adjustment	1,018				1,018
Unrealized gain (loss) on available-for-sale securities, net of tax	0				(126)
Change in pension plans, net of tax					9
Non-vested stock forfeitures (in shares)		(10,632)
Non-vested stock forfeitures						0
Balance, end of period (in shares) at Jun. 30, 2023		10,250,949
Balance, end of period at Jun. 30, 2023	$ 520,444	$ 514	$ 87,932	$ 428,927	$ 4,981	$ (1,910)