Fair Values of Financial Instruments - Summary of Reconciliation of Acquisition Related Contingent Consideration (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value adjustment - (income) expense	$ 1,910	$ (3,576)	$ (1,077)
Level 3 [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Opening balance	136,570	46,850
Increase due to acquisitions	133,857	109,784
Decrease due to measurement period adjustments		(18,396)
Payment/current payables	(15,080)	(5,244)
Fair value adjustment - (income) expense	(1,910)	3,576
Ending balance	$ 253,437	$ 136,570	$ 46,850