Acquisitions and Divestitures - Schedule of Condensed Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Business Acquisition [Line Items]
Net sales	$ 1,211,661	$ 1,162,526	$ 3,510,997	$ 3,197,519
Income from operations	44,404	37,472	45,086	101,077
2017 System Transformation Transactions Acquisitions [Member]
Business Acquisition [Line Items]
Net sales	308,825	221,034	896,179	454,174
Income from operations	11,874	3,176	14,635	13,595
2017 System Transformation Transactions [Member]
Business Acquisition [Line Items]
Net sales	308,825	300,066	896,179	685,475
Income from operations	$ 11,874	10,865	$ 14,635	36,568
October 2017 Divestitures [Member]
Business Acquisition [Line Items]
Net sales		79,032		231,301
Income from operations		$ 7,689		$ 22,973