Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 29, 2016	Jul. 31, 2015	Aug. 01, 2014
Current [Abstract]
Federal	$ 62,054	$ 71,386	$ 53,713
State	6,447	6,050	4,597
Deferred [Abstract]
Federal	12,477	(6,178)	(2,863)
State	(3,858)	3,040	3,274
Total provision for income taxes	$ 77,120	74,298	58,721
U.S. federal statutory rate used	35.00%
Provision computed at federal statutory income tax rate	$ 93,247	83,370	66,797
State and local income taxes, net of federal benefit	1,427	6,378	5,029
Employer tax credits for FICA taxes paid on employee tip income	(11,048)	(10,681)	(9,962)
Other employer tax credits	(7,326)	(5,058)	(3,781)
Other-net	820	289	638
Total provision for income taxes	77,120	74,298	58,721
Deferred tax assets [Abstract]
Compensation and employee benefits	13,937	13,721
Deferred rent	17,183	16,022
Accrued liabilities	12,466	16,869
Insurance reserves	11,444	12,074
Inventory	4,368	4,525
Other	8,718	2,606
Deferred tax assets	68,116	65,817
Deferred tax liabilities [Abstract]
Property and equipment	97,695	88,651
Inventory	9,803	11,568
Other	12,024	9,534
Deferred tax liabilities	119,522	109,753
Net deferred tax liability	51,406	43,936
Reconciliation of gross liability for uncertain tax positions [Roll Forward]
Balance at beginning of year	25,507	22,832	20,972
Tax positions related to the current year [Abstract]
Additions	4,860	3,994	3,989
Reductions	0	0	0
Tax positions related to prior year [Abstract]
Additions	2,186	118	1,400
Reductions	(6,896)	(227)	(1,630)
Settlements	(2,324)	(204)	(755)
Expiration of statute of limitations	(1,434)	(1,006)	(1,144)
Balance at end of year	21,899	25,507	22,832
Uncertain tax positions	14,234	16,579	14,840
Potential interest and penalties [Abstract]
Interest and penalties	5,497	9,754	8,559
Interest and penalties [Abstract]
Interest and penalties related to uncertain tax positions	(4,256)	$ 1,194	$ 691
Minimum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Potential decrease of liabilities for uncertain tax positions within the next twelve months	2,000
Maximum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Potential decrease of liabilities for uncertain tax positions within the next twelve months	$ 3,000