Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Items	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock (in shares)					3,003,419
Common stock, beginning balance (in shares) at Jan. 01, 2022		14,624,159
Beginning balance at Jan. 01, 2022	$ 565,616	$ 146	$ 115,888	$ 551,848	$ (73,596)	$ (30,350)	$ 1,680
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	67,850			67,362			488
Dividend declared – Common Stock	(6,064)			(6,064)
Activity under stock plans (in shares)					(41,233)
Activity under stock plans	(53)		(1,063)		$ 1,010
Other comprehensive items	(21,185)					(21,029)	(156)
Common stock, ending balance (in shares) at Jul. 02, 2022		14,624,159
Treasury stock, ending balance (in shares) at Jul. 02, 2022					2,962,186
Ending balance at Jul. 02, 2022	606,164	$ 146	114,825	613,146	$ (72,586)	(51,379)	2,012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock (in shares)					2,964,786
Common stock, beginning balance (in shares) at Apr. 02, 2022		14,624,159
Beginning balance at Apr. 02, 2022	599,738	$ 146	112,651	590,009	$ (72,649)	(32,302)	1,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	26,409			26,170			239
Dividend declared – Common Stock	(3,033)			(3,033)
Activity under stock plans (in shares)					(2,600)
Activity under stock plans	2,237		2,174		$ 63
Other comprehensive items	(19,187)					(19,077)	(110)
Common stock, ending balance (in shares) at Jul. 02, 2022		14,624,159
Treasury stock, ending balance (in shares) at Jul. 02, 2022					2,962,186
Ending balance at Jul. 02, 2022	$ 606,164	$ 146	114,825	613,146	$ (72,586)	(51,379)	2,012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock (in shares)					2,962,186
Treasury stock (in shares)	2,949,997				2,949,997
Common stock, beginning balance (in shares) at Dec. 31, 2022		14,624,159
Beginning balance at Dec. 31, 2022	$ 655,571	$ 146	119,924	660,644	$ (72,287)	(54,578)	1,722
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58,205			57,809			396
Dividend declared – Common Stock	(6,789)			(6,789)
Activity under stock plans (in shares)					(31,736)
Activity under stock plans	971		193		$ 778
Other comprehensive items	$ 5,067					5,031	36
Common stock, ending balance (in shares) at Jul. 01, 2023		14,624,159
Treasury stock, ending balance (in shares) at Jul. 01, 2023	2,918,261				2,918,261
Ending balance at Jul. 01, 2023	$ 713,025	$ 146	120,117	711,664	$ (71,509)	(49,547)	2,154
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock (in shares)					2,920,678
Common stock, beginning balance (in shares) at Apr. 01, 2023		14,624,159
Beginning balance at Apr. 01, 2023	684,305	$ 146	117,547	685,325	$ (71,569)	(49,085)	1,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,946			29,734			212
Dividend declared – Common Stock	(3,395)			(3,395)
Activity under stock plans (in shares)					(2,417)
Activity under stock plans	2,630		2,570		$ 60
Other comprehensive items	$ (461)					(462)	1
Common stock, ending balance (in shares) at Jul. 01, 2023		14,624,159
Treasury stock, ending balance (in shares) at Jul. 01, 2023	2,918,261				2,918,261
Ending balance at Jul. 01, 2023	$ 713,025	$ 146	$ 120,117	$ 711,664	$ (71,509)	$ (49,547)	$ 2,154
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock (in shares)	2,918,261				2,918,261