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Quarterly Financial Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 29, 2018
Oct. 06, 2018
 [1]
Jul. 14, 2018
 [1]
Dec. 30, 2017
Oct. 07, 2017
 [1]
Jul. 15, 2017
 [1]
Apr. 21, 2018
 [1]
Apr. 22, 2017
 [1]
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Sales $ 880,667 $ 923,449 $ 941,283 $ 873,623 $ 932,822 $ 926,639 $ 1,206,453 $ 1,187,649 $ 3,951,852 $ 3,920,733 $ 3,926,885
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below) 467,155 [2] 485,680 [2] 488,871 [2] 456,895 [2] 476,264 [2] 468,246 [2] 625,122 [2] 608,068 [2] 2,066,828 2,009,473 2,026,859
Net income (loss) $ 20,841 $ 39,630 $ 45,442 $ 78,533 $ (33,571) $ 44,740 $ 51,247 $ 60,418 $ 157,160 $ 150,120 $ 163,776
Basic net income (loss) per share $ 0.10 $ 0.19 $ 0.22 $ 0.37 $ (0.16) $ 0.21 $ 0.24 $ 0.29 $ 0.74 $ 0.72 $ 0.79
Diluted net income (loss) per share $ 0.10 $ 0.19 $ 0.21 $ 0.37 $ (0.16) $ 0.21 $ 0.24 $ 0.29 $ 0.74 $ 0.71 $ 0.78
[1] As disclosed in Note 4, Financial Statement Revisions, the company reported cash receipts and payments for the repurchase and sale of territories and cash paid at issuance of notes receivable at net when these transactions should have been disaggregated. We concluded that the errors were not material to any of these prior periods that were impacted. The error resulted in an understatement of cash flows from operating activities and cash flows used in investing activities of $5.9 million, $12.1 million and $12.8 million, respectively, for the sixteen, twenty-eight, and forty-week amounts included in the first, second, and third quarters of fiscal 2017, respectively.  These amounts were revised upon subsequent presentation of these financial statements.
[2] 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.