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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2015 | Jun. 28, 2015 | Jul. 02, 2017 | Jul. 03, 2016 | Jun. 28, 2015 | Dec. 31, 2017 | Dec. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | $ 5,869 |  |  | $ 4,907 |  | $ 14,277 | $ 19,390 |  |
Cost of Sales [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 1,800 |  |  | 1,800 |  | 3,900 | 3,200 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 3,600 |  |  | 2,700 |  | 9,700 | 14,500 |  |
Research and Development [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 500 |  |  | 400 |  | 700 | 1,700 |  |
Grass Valley Restructuring Program [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 900 |  |  |  |  | 5,000 |  |  |
Savings from the restructuring program |  |  |  | $ 30,000 |  |  |  |  |  |
Grass Valley Restructuring Program [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated severance charges and other restructuring costs | $ 1,000 |  |  |  |  |  |  |  |  |
Productivity Improvement Program and Acquisition Integration [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  |  |  |  | $ 4,900 |  |  | $ 19,400 |  |
Productivity Improvement Program and Acquisition Integration [Member] | M2FX Limited [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 600 |  |  |  |  | 1,000 |  |  |
Industrial Restructuring Program [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 2,400 |  |  |  |  | 5,800 |  |  |
Expected savings from the restructuring program |  |  | $ 18,000 |  |  |  |  |  |  |
Industrial Restructuring Program [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Additional severance and other restructuring costs | $ 2,000 |  |  |  |  |  |  |  |  |
Industrial Manufacturing Footprint Program [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | $ 2,000 |  |  |  |  | $ 2,500 |  |  |
Industrial Manufacturing Footprint Program [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Additional severance and other restructuring costs |  |  |  |  |  |  |  |  | $ 15,000 | $ 16,000
Expected savings from the restructuring program |  |  |  |  |  | $ 10,000 |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |
Restructuring and integration cost payable period |  |  |  |  |  |  | 60 days |  |  |

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