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Reconciliation of Effective Tax Amount (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 30, 2017
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]        
Tax at U.S. federal income tax rate   $ 41,404 $ 52,253 $ 87,338
State income taxes, net of federal income tax benefit   5,213 3,564 7,266
Tax reform impact $ (48,160) (5,575) (48,160)  
Section 199 qualifying production activities benefit     (5,422) (8,007)
Net share-based payments (windfalls) shortfalls [1]   1,639 (1,001)  
Other   (2,680) (2,061) (836)
Income tax expense (benefit)   $ 40,001 $ (827) $ 85,761
[1] Applied beginning in fiscal 2017 upon adoption of new guidance.