Acquisitions and Divestitures - Schedule of Condensed Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Business Acquisition [Line Items]
Net sales	$ 1,169,291	$ 840,384	$ 2,034,993	$ 1,465,840
Income from operations	47,313	54,736	60,921	67,137
2017 Expansion Transactions [Member]
Business Acquisition [Line Items]
Net sales	206,894		233,140
Income from operations	10,323		10,419
2016 Expansion Transactions [Member]
Business Acquisition [Line Items]
Net sales	265,755	162,819	504,415	198,130
Income from operations	4,997	13,502	9,351	14,708
2016 and 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Net sales	472,649	162,819	737,555	198,130
Income from operations	$ 15,320	$ 13,502	$ 19,770	$ 14,708