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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 18 Months Ended | 21 Months Ended | 24 Months Ended | 27 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jul. 02, 2017 | Apr. 02, 2017 | Jul. 03, 2016 | Dec. 31, 2017 | Jul. 02, 2017 | Jul. 03, 2016 | Jul. 02, 2017 | Jul. 02, 2017 | Jul. 02, 2017 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs | $ 9,560 |  | $ 5,869 |  | $ 16,160 | $ 14,277 |  |  |  |
Cost of Sales |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 8,200 |  | 1,800 |  | 14,100 | 3,900 |  |  |  |
Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 1,400 |  | 3,600 |  | 2,100 | 9,700 |  |  |  |
Research and Development |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  |  | 500 |  |  | 700 |  |  |  |
Industrial Restructuring Program |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 2,400 |  |  |  | 5,800 |  |  | $ 13,000 |  |
Expected savings from the restructuring program |  |  |  |  | 18,000 |  |  |  |  |
Industrial Manufacturing Footprint Program |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 8,200 |  | 2,000 |  | 13,900 | 2,500 | $ 31,700 |  |  |
Additional severance and other restructuring costs | $ 11,000 |  |  |  | $ 11,000 |  | $ 11,000 | $ 11,000 | $ 11,000 |
Grass Valley Restructuring Program |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | $ 0 | $ 900 |  |  | $ 5,000 |  |  | $ 34,100 |
Scenario, Forecast | Industrial Manufacturing Footprint Program |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Expected savings from the restructuring program |  |  |  | $ 13,000 |  |  |  |  |  |
Scenario, Forecast | Grass Valley Restructuring Program |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Savings from the restructuring program |  |  |  |  |  |  |  |  |  | $ 30,000
Maximum |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring and integration cost payable period |  |  |  |  | 60 days |  |  |  |  |

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