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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 | 6 Months Ended
--- | --- | ---
Jul. 02, 2017 | Jul. 03, 2016 | Jul. 02, 2017 | Jul. 03, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Consolidated Revenues | $ 610,633 | $ 601,631 | $ 1,162,014 | $ 1,143,128
Amortization of intangibles | (27,113) | (26,263) | (50,782) | (51,795)
Depreciation expense | (11,500) | (12,000) | (22,900) | (23,700)
Severance, restructuring, and acquisition integration costs | (9,560) | (5,869) | (16,160) | (14,277)
Operating income | 62,481 | 62,241 | 113,818 | 103,205
Interest expense, net | (23,533) | (24,049) | (47,039) | (48,445)
Loss on debt extinguishment | (847) | 0 | (847) | 0
Income before taxes | 38,101 | 38,192 | 65,932 | 54,760
Reportable Segment |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Total Segment Revenues | 610,633 | 603,381 | 1,162,014 | 1,147,181
Deferred revenue adjustments | 0 | (1,750) | 0 | (4,053)
Consolidated Revenues | 610,633 | 601,631 | 1,162,014 | 1,143,128
Total Segment EBITDA | 110,227 | 108,335 | 203,337 | 198,401
Amortization of intangibles | (27,113) | (26,263) | (50,782) | (51,795)
Depreciation expense | (11,528) | (11,987) | (22,911) | (23,650)
Severance, restructuring, and acquisition integration costs | (9,560) | (5,869) | (16,160) | (14,277)
Purchase accounting effects related to acquisitions | (1,167) | 0 | (1,167) | (195)
Deferred gross profit adjustments | 0 | (1,750) | 0 | (4,053)
Income from equity method investment | 2,277 | 661 | 3,284 | 491
Eliminations |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Operating income | $ (655) | $ (886) | $ (1,783) | $ (1,717)

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