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	4,943	4,961					4,961		(18)
Other comprehensive income (loss)	(1,591)	(1,591)						(1,591)
Share-based compensation expense	366	366				366
Restricted stock issuances	(845)	(845)	3			(848)
Distributions to noncontrolling interests	(111)								(111)
Balance, ending at Apr. 03, 2021	260,619	260,714	1,320	103	(8,765)	197,282	105,036	(34,262)	(95)
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	6,684	6,356					6,356		328
Other comprehensive income (loss)	(1,711)	(1,711)						(1,711)
Share-based compensation expense	497	497				497
Restricted stock issuances	(423)	(423)	2			(425)
Distributions to noncontrolling interests	(246)								(246)
Balance, ending at Apr. 02, 2022	$ 281,843	$ 281,818	$ 1,324	$ 103	$ (8,765)	$ 199,223	$ 126,652	$ (36,719)	$ 25