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 Income (Loss)	Noncontrolling Interests
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 (loss) 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
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 (loss) 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
Balance, beginning at Dec. 31, 2023	329,925	329,842	1,330	103	(17,460)	202,672	182,066	(38,869)	83
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	9,146	9,143					9,143		3
Other comprehensive income (loss)	(695)	(695)						(695)
Share-based compensation expense	1,060	1,060				1,060
Restricted stock issuances	(854)	(854)	6			(860)
Purchase of treasury stock	(7,815)	(7,815)			(7,815)
Excise tax on net share repurchase	(60)	(60)			(60)
Distributions to noncontrolling interests	(50)								(50)
Balance, ending at Sep. 28, 2024	330,657	330,621	1,336	103	(25,335)	202,872	191,209	(39,564)	36
Balance, beginning at Jun. 29, 2024	327,034	327,011	1,336	103	(23,388)	202,765	192,560	(46,365)	23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	(1,328)	(1,351)					(1,351)		23
Other comprehensive income (loss)	6,801	6,801						6,801
Share-based compensation expense	107	107				107
Purchase of treasury stock	(1,928)	(1,928)			(1,928)
Excise tax on net share repurchase	(19)	(19)			(19)
Distributions to noncontrolling interests	(10)								(10)
Balance, ending at Sep. 28, 2024	$ 330,657	$ 330,621	$ 1,336	$ 103	$ (25,335)	$ 202,872	$ 191,209	$ (39,564)	$ 36