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Acquisitions (Pro Forma Information) (Details) - Dynamic Systems Inc. $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 30, 2019 USD ($) $ / shares
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |
Pro forma net revenues | $ | $ 83,622
Pro forma net earnings attributable to VPG stockholders | $ | $ 11,831
Pro forma basic earnings per share attributable to VPG stockholders (in dollars per share) | $ / shares | $ 0.88
Pro forma diluted earnings per share attributable to VPG stockholders (in dollars per share) | $ / shares | $ 0.87

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