Consolidated Condensed Statements of Equity - USD ($) $ in Thousands	Total	Total VPG Inc. Stockholders' Equity	Common Stock	Class B Convertible Common Stock	Treasury Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance, beginning at Dec. 31, 2021	$ 277,042	$ 277,099	$ 1,322	$ 103	$ (8,765)	$ 199,151	$ 120,296	$ (35,008)	$ (57)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	27,712	27,229					27,229		483
Other comprehensive income (loss)	(17,987)	(17,987)						(17,987)
Share-based compensation expense	1,583	1,583				1,583
Restricted stock issuances	(423)	(423)	3			(426)
Purchase of treasury stock	(1,061)	(1,061)			(1,061)
Distributions to noncontrolling interests	(366)								(366)
Balance, ending at Oct. 01, 2022	286,500	286,440	1,325	103	$ (9,826)	200,308	147,525	(52,995)	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury stock (shares)					32,601
Balance, beginning at Jul. 02, 2022	285,350	285,238	1,325	103	$ (8,765)	199,749	137,407	(44,581)	112
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	10,148	10,118					10,118		30
Other comprehensive income (loss)	(8,414)	(8,414)						(8,414)
Share-based compensation expense	559	559				559
Purchase of treasury stock	(1,061)	(1,061)			(1,061)
Distributions to noncontrolling interests	(82)								(82)
Balance, ending at Oct. 01, 2022	286,500	286,440	1,325	103	$ (9,826)	200,308	147,525	(52,995)	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury stock (shares)					32,601
Balance, beginning at Dec. 31, 2022	306,522	306,547	1,325	103	$ (11,504)	201,164	156,359	(40,900)	(25)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	21,690	21,480					21,480		210
Other comprehensive income (loss)	(3,829)	(3,829)						(3,829)
Share-based compensation expense	1,885	1,885				1,885
Restricted stock issuances	(777)	(777)	5			(782)
Purchase of treasury stock	(1,196)	(1,196)			(1,196)
Distributions to noncontrolling interests	(138)								(138)
Balance, ending at Sep. 30, 2023	324,157	324,110	1,330	103	$ (12,700)	202,267	177,839	(44,729)	47
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury stock (shares)					35,206
Balance, beginning at Jul. 01, 2023	321,665	321,603	1,330	103	$ (11,924)	201,611	171,559	(41,076)	62
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	6,357	6,280					6,280		77
Other comprehensive income (loss)	(3,653)	(3,653)						(3,653)
Share-based compensation expense	656	656				656
Purchase of treasury stock	(776)	(776)			(776)
Distributions to noncontrolling interests	(92)								(92)
Balance, ending at Sep. 30, 2023	$ 324,157	$ 324,110	$ 1,330	$ 103	$ (12,700)	$ 202,267	$ 177,839	$ (44,729)	$ 47
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury stock (shares)					22,894