Earnings Per Share - (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Numerator:
Net earnings attributable to VPG stockholders	$ 6,280	$ 10,118	$ 21,480	$ 27,229
Denominator:
Weighted average shares (in shares)	13,600	13,649	13,596	13,645
Effect of dilutive securities:
Restricted stock units (in shares)	86	59	74	47
Dilutive potential common shares (in shares)	86	59	74	47
Denominator for diluted earnings per share:
Adjusted weighted average shares (in shares)	13,686	13,708	13,670	13,692
Basic earnings per share attributable to VPG stockholders (dollars per share)	$ 0.46	$ 0.74	$ 1.58	$ 2.00
Diluted earnings per share attributable to VPG stockholders (dollars per share)	$ 0.46	$ 0.74	$ 1.57	$ 1.99