Income Taxes (Details) - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Aug. 03, 2018	Aug. 03, 2018	Jul. 28, 2017	Jul. 29, 2016
Current [Abstract]
Federal		$ 40,761	$ 83,743	$ 62,054
State		6,099	7,567	6,447
Deferred [Abstract]
Federal		(16,779)	4,696	12,477
State		722	982	(3,858)
Total provision for income taxes		$ 30,803	$ 96,988	$ 77,120
Reconciliation of provision for income taxes and income taxes [Abstract]
U.S. federal statutory rate used	21.00%	26.90%	35.00%	35.00%
Provision computed at federal statutory income tax rate		$ 74,859	$ 104,611	$ 93,247
State and local income taxes, net of federal benefit		5,066	5,856	1,427
Revaluation of deferred taxes due to a reduction in the federal tax rate at the enactment date of the Tax Act		(26,772)	0	0
Revaluation of deferred taxes due to the impact of the change in rate on 2018 temporary items		(3,710)	0	0
Employer tax credits for FICA taxes paid on employee tip income		(13,707)	(11,543)	(11,048)
Other employer tax credits		(4,476)	(2,814)	(7,326)
Other-net		(457)	878	820
Total provision for income taxes		30,803	96,988	77,120
Deferred tax assets [Abstract]
Compensation and employee benefits	$ 6,342	6,342	10,110
Deferred rent	12,667	12,667	18,270
Accrued liabilities	8,546	8,546	13,233
Insurance reserves	7,291	7,291	12,401
Inventory	3,106	3,106	4,411
Other	0	0	2,767
Deferred tax assets	37,952	37,952	61,192
Deferred tax liabilities [Abstract]
Property and equipment	75,433	75,433	100,373
Inventory	7,448	7,448	10,906
Other	7,232	7,232	12,273
Deferred tax liabilities	90,113	90,113	123,552
Net deferred tax liability	52,161	52,161	62,360
Reconciliation of gross liability for uncertain tax positions [Roll Forward]
Balance at beginning of year		20,731	21,899	25,507
Tax positions related to the current year [Abstract]
Additions		3,029	4,003	4,860
Reductions		0	0	0
Tax positions related to prior year [Abstract]
Additions		610	582	2,186
Reductions		(575)	(2,966)	(6,896)
Settlements		(3,878)	(1,027)	(2,324)
Expiration of statute of limitations		(1,283)	(1,760)	(1,434)
Balance at end of year	18,634	18,634	20,731	21,899
Uncertain tax positions	14,721	14,721	13,475	14,234
Potential interest and penalties [Abstract]
Interest and penalties	5,681	5,681	6,128	5,497
Interest and penalties [Abstract]
Interest and penalties related to uncertain tax positions		(447)	$ 631	$ (4,256)
Minimum [Member]
Uncertain Tax Positions [Abstract]
Potential decrease of liabilities for uncertain tax positions within the next twelve months	2,000	2,000
Maximum [Member]
Uncertain Tax Positions [Abstract]
Potential decrease of liabilities for uncertain tax positions within the next twelve months	$ 3,000	$ 3,000