Acquisitions and Divestitures - Schedule of Condensed Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Business Acquisition [Line Items]
Net sales	$ 1,162,526	$ 849,028	$ 3,197,519	$ 2,314,868
Income from operations	36,130	39,801	97,051	106,938
2017 Expansion Transactions [Member]
Business Acquisition [Line Items]
Net sales	221,034		454,174
Income from operations	3,176		13,595
2016 Expansion Transactions [Member]
Business Acquisition [Line Items]
Net sales	257,238	174,420	761,653	372,550
Income from operations	7,153	2,512	16,504	17,220
2016 and 2017 Acquisitions [Member]
Business Acquisition [Line Items]
Net sales	478,272	174,420	1,215,827	372,550
Income from operations	$ 10,329	$ 2,512	$ 30,099	$ 17,220