Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Total VPG Inc. Stockholders' Equity	Total VPG Inc. Stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Class B Convertible Common Stock	Treasury Stock	Capital in Excess of Par Value	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balance at beginning of period at Dec. 31, 2018	$ 218,453		$ 218,415		$ 1,307	$ 103	$ (8,765)	$ 196,666	$ 66,569		$ (37,465)	$ 38
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	22,295		22,188						22,188			107
Other comprehensive income (loss)	(238)		(238)								(238)
Share-based compensation expense	1,336		1,336					1,336
Restricted stock issuances	(872)		(872)		5			(877)
Impact due to DSI acquisition	299											299
Distributions to noncontrolling interests	(52)											(52)
Balance at end of period at Dec. 31, 2019	$ 241,752	$ 531	241,360	$ 531	1,312	103	(8,765)	197,125	89,288	$ 531	(37,703)	392
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02 [Member]
Net earnings	$ 10,800		10,787						10,787			13
Other comprehensive income (loss)	5,032		5,032								5,032
Share-based compensation expense	1,387		1,387					1,387
Restricted stock issuances	(791)		(791)		5			(796)
Purchase of noncontrolling interest	(253)		48					48				(301)
Distributions to noncontrolling interests	(70)											(70)
Balance at end of period 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	20,443		20,221						20,221			222
Other comprehensive income (loss)	(2,337)		(2,337)								(2,337)
Share-based compensation expense	2,244		2,244					2,244
Restricted stock issuances	(852)		(852)		5			(857)
Distributions to noncontrolling interests	(313)											(313)
Balance at end of period at Dec. 31, 2021	$ 277,042		$ 277,099		$ 1,322	$ 103	$ (8,765)	$ 199,151	$ 120,296		$ (35,008)	$ (57)