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Quarterly Financial Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 4 Months Ended 12 Months Ended
Jan. 02, 2021
Oct. 03, 2020
Jul. 11, 2020
Dec. 28, 2019
Oct. 05, 2019
Jul. 13, 2019
Apr. 18, 2020
Apr. 20, 2019
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]                      
Sales $ 1,023,036 $ 989,650 $ 1,025,861 $ 917,759 $ 966,561 $ 975,759 $ 1,349,444 $ 1,263,895 $ 4,387,991 $ 4,123,974 $ 3,951,852
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below) 521,577 [1] 497,659 [1] 506,033 [1] 485,960 [1] 509,056 [1] 508,552 [1] 670,873 [1] 652,141 [1] 2,196,142 2,155,709 2,066,828
Net (loss) income $ 55,824 $ 44,347 $ 57,919 $ 2,219 $ 43,358 $ 53,095 $ (5,772) $ 65,866 $ 152,318 $ 164,538 $ 157,160
Basic net (loss) income per share $ 0.26 $ 0.21 $ 0.27 $ 0.01 $ 0.20 $ 0.25 $ (0.03) $ 0.31 $ 0.72 $ 0.78 $ 0.74
Diluted net (loss) income per share $ 0.26 $ 0.21 $ 0.27 $ 0.01 $ 0.20 $ 0.25 $ (0.03) $ 0.31 $ 0.72 $ 0.78 $ 0.74
[1] The company does not report gross margin.  This line item presents our material, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately) under an alternative presentation.