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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Apr. 01, 2018
Restructuring Cost and Reserve [Line Items] |  |
Severance, restructuring, and acquisition integration costs | $ 3,775 | $ 20,394
Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring and integration cost payable period | 60 days |
Cost of Sales |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance, restructuring, and acquisition integration costs | $ 600 | 9,400
Selling, General and Administrative Expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance, restructuring, and acquisition integration costs | 2,800 | 9,400
Research and Development |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance, restructuring, and acquisition integration costs | 400 | 1,600
Grass Valley And SAM Integration Program |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance, restructuring, and acquisition integration costs | $ 3,000 | 9,200
Industrial Manufacturing Footprint Program |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance, restructuring, and acquisition integration costs |  | $ 7,500

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