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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Oct. 02, 2016 | Apr. 03, 2016 | Dec. 31, 2015 | Sep. 27, 2015 | Dec. 31, 2017 | Oct. 02, 2016 | Sep. 27, 2015
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | $ 12,795 |  |  | $ 14,143 |  | $ 27,072 | $ 33,533
Cost of Sales [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 2,900 |  |  | 3,200 |  | 6,800 | 6,300
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 9,900 |  |  | 9,300 |  | 19,600 | 23,800
Research and Development [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 0 |  |  | 1,600 |  | 700 | 3,400
Industrial Restructuring Program [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 2,600 |  |  |  |  | 8,400 |
Expected savings from the restructuring program |  |  | $ 18,000 |  |  |  |  |
Industrial Manufacturing Footprint Program [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 10,000 |  |  |  |  | 12,500 |
Industrial Manufacturing Footprint Program [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Additional severance and other restructuring costs | $ 5,000 |  |  |  |  | $ 15,000 |  |
Expected savings from the restructuring program |  |  |  |  |  | $ 10,000 |  |
Grass Valley Restructuring Program [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 100 |  |  |  |  | 5,100 |
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 |  |  |  |  | $ 100 |  |  | $ 19,500
Productivity Improvement Program and Acquisition Integration [Member] | M2FX Limited [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | $ 100 |  |  |  |  | $ 1,100 |
Maximum [Member] |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring and integration cost payable period |  |  |  |  |  |  | 60 days |

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