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Income Taxes (Details) - USD ($)
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Income Tax Disclosure [Abstract]      
Corporate Income Tax Rate - Current 35.00%    
Enacted Corporate Income Tax Rate 21.00%    
Tax Credit Carryforward, Amount $ 5,100,000 $ 7,500,000  
Deferred Tax Assets, Valuation Allowance 0 0  
Current tax expense      
Federal 207,986,000 221,207,000 $ 225,253,000
State 14,516,000 20,858,000 17,419,000
Total current 222,502,000 242,065,000 242,672,000
Deferred tax expense (benefit)      
Deferred Federal Income Tax Expense (Benefit) 22,469,000 12,256,000 (7,017,000)
Deferred State and Local Income Tax Expense (Benefit) 4,953,000 (3,171,000) 1,567,000
Deferred income tax expense (benefit), net of tax expense of interest rate swap 27,422,000 9,085,000 (5,450,000)
Total income tax expense 249,924,000 251,150,000 237,222,000
Tax assets      
Inventory valuation 13,029,000 19,713,000  
Accrued employee benefits costs 7,092,000 14,120,000  
Accrued sales tax audit reserve 3,479,000 4,317,000  
Rent expenses in excess of cash payments required 24,728,000 35,391,000  
Deferred compensation 20,299,000 23,978,000  
Workers’ compensation insurance 9,153,000 13,565,000  
General liability insurance 4,265,000 5,332,000  
Lease exit obligations 1,829,000 2,617,000  
Income tax credits 4,206,000 4,265,000  
Other 6,997,000 7,311,000  
Total non current deferred tax asset 95,077,000 130,609,000  
Tax liabilities      
Inventory basis differences (4,141,000) (4,600,000)  
Prepaid Expenses (1,423,000) (2,912,000)  
Depreciation (65,650,000) (73,336,000)  
Amortization (3,818,000) (2,419,000)  
Other (1,551,000) (2,124,000)  
Total non current deferred tax liabilities (76,583,000) (85,391,000)  
Net deferred tax asset 18,494,000 45,218,000  
Provision for income tax reconciliation to amounts computed at the federal statutory rate      
Tax provision at statutory rate 235,383,000 240,894,000 226,666,000
State income taxes, net of federal tax benefits 14,320,000 15,527,000 13,976,000
Tax credits, net of federal tax benefits (5,060,000) (7,227,000) (3,763,000)
Stock-based compensation programs (1,040,000) 0 0
Enactment of tax legislation 4,856,000 0 0
Other (1,465,000) (1,956,000) (343,000)
Total income tax expense 249,924,000 251,150,000 237,222,000
Unrecognized tax benefits that would Impact effective tax rate 1,700,000    
Reconciliation of gross unrecognized tax benefits      
Balance at beginning of period 1,579,000 2,922,000 3,500,000
Additions based on tax positions related to the current year 527,000 460,000 869,000
Additions for tax positions of prior years 14,000 139,000 0
Reductions for tax positions of prior years (127,000) (1,829,000) (1,447,000)
Reductions due to audit results 0 (113,000) 0
Balance at end of year $ 1,993,000 $ 1,579,000 $ 2,922,000