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Acquisition and Divestiture Activities (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 02, 2016 | Dec. 31, 2015
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |
Goodwill | $ 142,183 | $ 138,244
Sonntag [Member] |  |
Business Acquisition, Equity Interests Issued or Issuable [Line Items] |  |
Acquisition of business, net of cash acquired | $ 5,450 |
Business Acquisition, Name of Acquired Entity | Sonntag Electronic GmbH |
Business Acquisition, Effective Date of Acquisition | Jan. 01, 2016 |
Goodwill related to acquisitions | $ 3,485 |
Gross purchase price of acquired business |  | $ 6,750

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