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, 2020	$ 257,857	$ 257,823	$ 1,317	$ 103	$ (8,765)	$ 197,764	$ 100,075	$ (32,671)	$ 34
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	9,006	8,881					8,881		125
Other comprehensive income (loss)	(875)	(875)						(875)
Share-based compensation expense	942	942				942
Restricted stock issuances	(845)	(845)	5			(850)
Distributions to noncontrolling interests	(167)								(167)
Balance, ending at Jul. 03, 2021	265,918	265,926	1,322	103	(8,765)	197,856	108,956	(33,546)	(8)
Balance, beginning at Apr. 03, 2021	260,619	260,714	1,320	103	(8,765)	197,282	105,036	(34,262)	(95)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	4,063	3,920					3,920		143
Other comprehensive income (loss)	716	716						716
Share-based compensation expense	576	576				576
Restricted stock issuances	0	0	2			(2)
Distributions to noncontrolling interests	(56)								(56)
Balance, ending at Jul. 03, 2021	265,918	265,926	1,322	103	(8,765)	197,856	108,956	(33,546)	(8)
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	17,564	17,111					17,111		453
Other comprehensive income (loss)	(9,573)	(9,573)						(9,573)
Share-based compensation expense	1,024	1,024				1,024
Restricted stock issuances	(423)	(423)	3			(426)
Distributions to noncontrolling interests	(284)								(284)
Balance, ending at Jul. 02, 2022	285,350	285,238	1,325	103	(8,765)	199,749	137,407	(44,581)	112
Balance, beginning at Apr. 02, 2022	281,843	281,818	1,324	103	(8,765)	199,223	126,652	(36,719)	25
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	10,880	10,755					10,755		125
Other comprehensive income (loss)	(7,862)	(7,862)						(7,862)
Share-based compensation expense	527	527				527
Restricted stock issuances	0	0	1			(1)
Distributions to noncontrolling interests	(38)								(38)
Balance, ending at Jul. 02, 2022	$ 285,350	$ 285,238	$ 1,325	$ 103	$ (8,765)	$ 199,749	$ 137,407	$ (44,581)	$ 112