Commitments and Contingencies - Summary of Purchases from Manufacturing Cooperatives (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 60,361	$ 53,681	$ 173,402	$ 154,761
SAC [Member]
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	39,831	38,501	115,563	107,165
Southeastern [Member]
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 20,530	$ 15,180	$ 57,839	$ 47,596