Acquisitions and Divestitures - Schedule of Condensed Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Business Acquisition [Line Items]
Net sales	$ 1,072,064	$ 865,702
Income (loss) from operations	(18,997)	14,950
2017 System Transformation Transactions Acquisitions [Member]
Business Acquisition [Line Items]
Net sales	274,458	26,246
Income (loss) from operations	(935)	96
2017 System Transformation Transactions [Member]
Business Acquisition [Line Items]
Net sales	274,458	97,105
Income (loss) from operations	$ (935)	6,105
October 2017 Divestitures [Member]
Business Acquisition [Line Items]
Net sales		70,859
Income (loss) from operations		$ 6,009