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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 28 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | $ 11,688 | $ 16,679 | $ 57,010 | $ 32,839 |
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 | 4,800 | 12,400 | $ 21,400 | 26,500 |
Selling, General and Administrative Expenses |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 6,400 | 4,200 | 30,300 | 6,200 |
Research and Development |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 500 | 100 | 5,300 | 100 |
Grass Valley And SAM Integration Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 7,100 |  | 36,600 |  |
Additional severance and restructuring costs | 12,000 |  | 12,000 |  | $ 12,000
Industrial Manufacturing Footprint Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | $ 4,300 | $ 11,400 | $ 15,800 | $ 25,300 | $ 64,100

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