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Commitments and Contingencies - Summary of Company's Purchases from Manufacturing Cooperatives (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 29, 2019
Dec. 30, 2018
Loss Contingencies [Line Items]      
Total purchases from manufacturing cooperatives $ 281,517 $ 292,517 $ 280,935
Southeastern      
Loss Contingencies [Line Items]      
Total purchases from manufacturing cooperatives 125,659 132,328 125,352
SAC      
Loss Contingencies [Line Items]      
Total purchases from manufacturing cooperatives $ 155,858 $ 160,189 $ 155,583