Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 0	$ 0
Tax Credit Carryforward, Amount	7,500,000	4,400,000
Current tax expense
Federal	221,207,000	225,253,000	$ 211,383,000
State	20,858,000	17,419,000	25,133,000
Total current	242,065,000	242,672,000	236,516,000
Deferred tax expense (benefit)
Deferred Federal Income Tax Expense (Benefit)	12,256,000	(7,017,000)	(14,493,000)
Deferred State and Local Income Tax Expense (Benefit)	(3,171,000)	1,567,000	(5,321,000)
Deferred income tax expense (benefit), net of tax expense of interest rate swap	9,085,000	(5,450,000)	(19,814,000)
Total provision	251,150,000	237,222,000	216,702,000
Tax assets
Inventory valuation	19,713,000	18,147,000
Accrued employee benefit costs	14,120,000	16,485,000
Deferred Tax Assets Long Term, Tax Effect Of Sales Tax Audits	4,317,000	4,821,000
Rent expenses in excess of cash payments required	35,391,000	30,788,000
Deferred compensation	23,978,000	20,125,000
Workers compensation insurance	13,565,000	12,116,000
General liability insurance	5,332,000	4,853,000
Lease exit obligation	2,617,000	2,378,000
Income tax credits	4,265,000	2,316,000
Other	7,311,000	8,831,000
Total non current deferred tax asset	130,609,000	120,860,000
Tax liabilities
Inventory basis differences	4,600,000	3,497,000
Prepaid Expenses	(2,912,000)	(2,108,000)
Depreciation	(73,336,000)	(55,805,000)
Amortization	(2,419,000)	(2,435,000)
Other	(2,124,000)	(1,821,000)
Total non current deferred tax liabilities	(85,391,000)	(65,666,000)
Net deferred tax asset	45,218,000	55,194,000
Provision for income tax reconciliation to amounts computed at the federal statutory rate
Tax provision at statutory rate	240,894,000	226,666,000	205,656,000
State income taxes, net of federal tax benefits	11,496,000	12,341,000	12,878,000
Permanent differences	(1,240,000)	(1,785,000)	(1,832,000)
Total provision	251,150,000	237,222,000	216,702,000
Unrecognized tax benefits that would Impact effective tax rate	1,100,000
Reconciliation of gross unrecognized tax benefits
Balance at beginning of period	2,922,000	3,500,000	2,482,000
Additions based on tax positions related to the current period	460,000	869,000	1,104,000
Additions for tax positions of prior periods	139,000	0	280,000
Reductions for tax positions of prior periods	(1,829,000)	(1,447,000)	(366,000)
Reductions due to audit results	(113,000)	0	0
Balance at end of period	$ 1,579,000	$ 2,922,000	$ 3,500,000