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Operating Segments - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income from Continuing Operations Before Taxes (Footnotes) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 02, 2016 | Sep. 27, 2015 | Oct. 02, 2016 | Sep. 27, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Cost of sales related to adjustment of acquired inventory | $ 355,147 | $ 353,135 | $ 1,025,027 | $ 1,043,922
M2FX Limited [Member] | Fair Value Adjustment to Inventory [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Cost of sales related to adjustment of acquired inventory |  |  | $ 200 |
Tripwire [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Compensation expense |  |  |  | 9,200
Coast Wire And Plastic Tech [Member] | Fair Value Adjustment to Inventory [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Cost of sales related to adjustment of acquired inventory |  |  |  | $ 300

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