Commitments and Contingencies - Summary of Company's Purchases from Manufacturing Cooperatives (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 68,128	$ 62,851	$ 125,098	$ 113,041
SAC [Member]
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	40,507	42,510	74,141	75,732
Southeastern [Member]
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 27,621	$ 20,341	$ 50,957	$ 37,309