Commitments and Contingencies - Summary of Company's Purchases from Manufacturing Cooperatives (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 68,202	$ 74,048	$ 214,060	$ 222,427
Southeastern
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	31,196	31,178	94,835	102,118
SAC
Loss Contingencies [Line Items]
Total purchases from manufacturing cooperatives	$ 37,006	$ 42,870	$ 119,225	$ 120,309