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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 (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Apr. 02, 2017 | Apr. 03, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Consolidated Revenues | $ 551,381 | $ 541,497
Amortization of intangibles | (23,669) | (25,532)
Depreciation expense | (11,400) | (11,700)
Severance, restructuring, and acquisition integration costs | (6,600) | (8,408)
Operating income | 51,337 | 40,964
Interest expense, net | (23,506) | (24,396)
Income before taxes | 27,831 | 16,568
Reportable Segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Total Segment Revenues | 551,381 | 543,800
Deferred revenue adjustments | 0 | (2,303)
Consolidated Revenues | 551,381 | 541,497
Total Segment EBITDA | 93,110 | 90,066
Amortization of intangibles | (23,669) | (25,532)
Depreciation expense | (11,383) | (11,663)
Severance, restructuring, and acquisition integration costs | (6,600) | (8,408)
Deferred gross profit adjustments | 0 | (2,303)
Purchase accounting effects related to acquisitions | 0 | (195)
Income from equity method investment | 1,007 | (170)
Eliminations [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Operating income | $ (1,128) | $ (831)

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