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Acquisition and Divestiture Activities (Details) (USD $) In Thousands | 9 Months Ended |
--- | --- | ---
Oct. 01, 2011 | Oct. 02, 2010 | Dec. 31, 2010
Duration of term loan | 3 |  |
Term loan issued in connection with business acquisitions |  | $ 15,000 |
Goodwill | 9,525 |  | 0
Purchase of businesses, net of cash acquired or refunded | $ 19,335 | $ 0 |
Common Stock |  |  |
Exchange Ratio Under Spin-Off |  | 1 share of VPG common stock for every 14 shares of Vishay common stock |
Class B Convertible Common Stock |  |  |
Exchange Ratio Under Spin-Off |  | 1 share of VPG Class B common stock for every 14 shares of Vishay Class B common stock |

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