Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	4 Months Ended	12 Months Ended
	Jul. 12, 2014	Apr. 19, 2014	Jan. 02, 2016	Jan. 03, 2015
Goodwill [Line Items]
Beginning balance		$ 282,404	$ 282,960	$ 282,404
Goodwill impairment	$ (2,600)			(2,624)
Change in goodwill related to an acquisition			181,966	3,180
Ending balance			464,926	282,960
DSD Segment
Goodwill [Line Items]
Beginning balance		277,927	278,483	277,927
Goodwill impairment		(2,624)		(2,624)
Change in goodwill related to an acquisition			145,925	3,180
Ending balance			424,408	278,483
Warehouse Segment
Goodwill [Line Items]
Beginning balance		$ 4,477	4,477	4,477
Change in goodwill related to an acquisition			36,041
Ending balance			$ 40,518	$ 4,477