Operating Segments and Geographic Information - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income (Loss) Before Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Revenues	$ 541,497	$ 546,957
Amortization of intangibles	(25,532)	(26,504)
Severance, restructuring, and acquisition integration costs	(8,408)	(14,483)
Depreciation expense	(11,700)	(11,500)
Consolidated operating income	40,964	4,898
Interest expense, net	(24,396)	(23,846)
Consolidated income (loss) before taxes	16,568	(18,948)
Reportable Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated Revenues	543,800	569,451
Deferred revenue adjustments	(2,303)	(22,494)
Total Segment EBITDA	90,066	88,297
Amortization of intangibles	(25,532)	(26,504)
Deferred gross profit adjustments	(2,303)	(21,658)
Severance, restructuring, and acquisition integration costs	(8,408)	(14,483)
Depreciation expense	(11,663)	(11,541)
Purchase accounting effects related to acquisitions	(195)	(9,422)
Income (loss) from equity method investment	(170)	768
Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consolidated operating income	$ (831)	$ (559)