Income Taxes (Details) (USD $)	12 Months Ended
	Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011	Jul. 31, 2010
Current: [Abstract]
Federal current	$ 22,173,000	$ 11,263,000	$ (3,116,000)
Foreign current	406,000	568,000	0
State current	2,702,000	3,478,000	765,000
Total current	25,281,000	15,309,000	(2,351,000)
Deferred: [Abstract]
Federal deferred	(2,866,000)	9,392,000	14,375,000
Foreign deferred	6,000	49,000	107,000
State deferred	590,000	433,000	246,000
Total deferred	(2,270,000)	9,874,000	14,728,000
Total	23,011,000	25,183,000	12,377,000
Deferred Tax Assets [Abstract]
Insurance and other reserves	23,089,000	22,014,000
Allowance for doubtful accounts and reserves	427,000	484,000
Net operating loss carryforwards	1,183,000	1,473,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	4,231,000	2,705,000
Other	1,800,000	1,673,000
Total deferred tax assets	30,730,000	28,349,000
Valuation allowance	(1,788,000)	(1,696,000)
Deferred tax assets, net of valuation allowance	28,942,000	26,653,000
Deferred Tax Liabilities [Abstract]
Property and equipment	36,491,000	35,832,000
Goodwill and intangibles	23,498,000	24,039,000
Other	712,000	686,000
Deferred tax liabilities	60,701,000	60,557,000
Net deferred tax liabilities	(31,759,000)	(33,904,000)
Valuation Allowance [Line Items]
Non-cash income tax charge				1,100,000
Valuation allowance, amount	1,788,000	1,696,000
Changes In Unrecognized Tax Benefits, Income Tax Penalties And Interest Accrued
Balance at beginning of year	2,194,000	2,054,000	1,977,000
Additions based on tax positions related to the fiscal year	155,000	154,000	226,000
Additions based on tax positions related to prior years	19,000	6,000	36,000
Reductions related to the expiration of statues of limitation	(20,000)	(20,000)	(185,000)
Balance at end of year	2,348,000	2,194,000	2,054,000	1,977,000
Payment of interest and penalties accrued	800,000	600,000
Impaired Investment
Deferred Tax Assets [Abstract]
Valuation allowance	(800,000)
Valuation Allowance [Line Items]
Valuation allowance deferred tax asset change in amount		300,000
Valuation allowance, amount	$ 800,000