Loss Reclassified from AOCI for Commodity Contracts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Net of tax	$ (3,399)	$ (5,413)	$ (3,366)
Commodity Contract
Accumulated Other Comprehensive Income Loss [Line Items]
Gross loss reclassified from AOCI into income	5,307	8,551	5,218
Tax benefit	(2,043)	(3,292)	(2,009)
Net of tax	$ 3,264	$ 5,259	$ 3,209