Commitments and Contingencies - Summary of Purchases from Manufacturing Cooperatives (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 230,001	$ 207,768	$ 200,601
SAC [Member]
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	149,878	144,511	132,635
Southeastern [Member]
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 80,123	$ 63,257	$ 67,966