Commitments and Contingencies - Summary of Company's Purchases from Manufacturing Cooperatives (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 72,996	$ 76,607	$ 145,858	$ 148,379
Southeastern
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	32,611	36,614	63,639	70,940
SAC
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 40,385	$ 39,993	$ 82,219	$ 77,439