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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 27 Months Ended
--- | --- | ---
Apr. 01, 2018 | Apr. 02, 2017 | Apr. 01, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Severance, restructuring, and acquisition integration costs | $ 20,394 | $ 6,600 |
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 | $ 9,400 | 5,900 |
Selling, General and Administrative Expenses |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance, restructuring, and acquisition integration costs | 9,400 | 700 |
Research and Development |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance, restructuring, and acquisition integration costs | 1,600 | 0 |
Grass Valley And SAM Integration Program [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance, restructuring, and acquisition integration costs | 9,200 |  |
Additional severance and restructuring costs | 41,000 |  | $ 41,000
Expected savings from the restructuring program | 44,000 |  |
Industrial Manufacturing Footprint Program |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance, restructuring, and acquisition integration costs | 7,500 | $ 5,700 | $ 55,900
Expected savings from the restructuring program | $ 13,000 |  |

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