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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 21 Months Ended | 24 Months Ended | 27 Months Ended
--- | --- | --- | --- | --- | --- | ---
Oct. 01, 2017 | Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 02, 2016 | Oct. 01, 2017 | Oct. 01, 2017 | Oct. 01, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | $ 16,679 | $ 12,795 | $ 32,839 | $ 27,072 |  |  |
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 |  | 12,400 | 2,900 | $ 26,500 | 6,800 |  |  |
Selling, General and Administrative Expenses |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 4,200 | 9,900 | 6,200 | 19,600 |  |  |
Research and Development |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  | 100 | 0 | 100 | 700 |  |  |
Industrial Restructuring Program |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  |  | 2,600 | 0 | 8,400 |  | $ 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 |  | 11,400 | 10,000 | 25,300 | 12,500 | $ 43,100 |  |
Expected savings from the restructuring program | 13,000 |  |  |  |  |  |  |
Additional severance and other restructuring costs | 7,000 | $ 7,000 |  | 7,000 |  | $ 7,000 | $ 7,000 | $ 7,000
Grass Valley Restructuring Program |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  |  | $ 100 | $ 0 | $ 5,100 |  |  | $ 34,100
Expected savings from the restructuring program | $ 30,000 |  |  |  |  |  |  |

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