Earnings Per Share - (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Numerator:
Net earnings attributable to VPG stockholders	$ 6,964	$ 6,356
Denominator:
Weighted average shares (in shares)	13,586	13,637
Effect of dilutive securities:
Restricted stock units (in shares)	66	38
Dilutive potential common shares (in shares)	66	38
Denominator for diluted earnings per share:
Adjusted weighted average shares (in shares)	13,652	13,675
Basic earnings per share attributable to VPG stockholders (dollars per share)	$ 0.51	$ 0.47
Diluted earnings per share attributable to VPG stockholders (dollars per share)	$ 0.51	$ 0.46