Employee Savings Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jul. 29, 2011	Jul. 30, 2010	Jul. 31, 2009
Qualified Defined Contribution Retirement Plan (Plan I) [Member]
Defined Contribution Plan Disclosures [Line Items]
Participation eligibility terms of the plan	Salaried and hourly employees who have completed ninety days of service and have attained the age of twenty-one.
Percentage of compensation allowed to be deferred by eligible employees (in hundredths)		16.00%
Percentage of company match to employee contribution (in hundredths)	25.00%	25.00%	25.00%
Maximum percentage of employee's compensation matched by company (in hundredths)	6.00%	6.00%	6.00%
Percentage of company contributions that vests annually (in hundredths)	20.00%	20.00%	20.00%
Percentage of company contribution that vests on employee's fifth anniversary of employment (in hundredths)	100.00%	100.00%	100.00%
Company contribution to the plan during the period	$ 1,986	$ 2,023	$ 2,052
Non-Qualified Defined Contribution Retirement Plan (Plan II) [Member]
Defined Contribution Plan Disclosures [Line Items]
Percentage of compensation allowed to be deferred by eligible employees (in hundredths)		50.00%
Percentage of eligible bonuses allowed to be deferred (in hundredths)		100.00%
Percentage of company match to employee contribution (in hundredths)	25.00%	25.00%	25.00%
Maximum percentage of employee's compensation matched by company (in hundredths)	6.00%	6.00%	6.00%
Percentage of company contributions that vests annually (in hundredths)	20.00%	20.00%	20.00%
Percentage of company contribution that vests on employee's fifth anniversary of employment (in hundredths)	100.00%	100.00%	100.00%
Company contribution to the plan during the period	388	316	285
Market value of the trust assets	29,665
Liability obligations to participants	$ 29,665

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The maximum percentage of employee compensation that can be matched by the company.

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- Definition

The amount of employer contributions provided during the period related to its defined contribution retirement plans.

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- Definition

This represents the entire liability recognized in the balance sheet that is associated with the company's non-qualified defined contribution retirement plan.

+ Details

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- Definition

Percentage of company match that vest annually.

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- Definition

Percentage of company match that vests on the fifth anniversary.

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- Definition

Percentage of company match to employees' contribution.

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- Definition

Percentage of compensation that eligible employees are allowed to defer.

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- Definition

Percentage of eligible bonus that eligible employees can defer.

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- Definition

This represents amount of the entire plan assets recognized in the balance sheet that are associated with the company's rabbi trust established for its non-qualified defined contribution plan.

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- Definition

Description of the terms and benefits provided by the employer's defined contribution plans. A defined contribution plan provides benefits in return for services rendered, provides an individual account for each participant, and has terms that specify how contributions to the individual's account are to be determined rather than the amount of benefits the individual is to receive. Under a defined contribution pension plan, the benefits a participant will receive depend solely on the amount contributed to the participant's account, the returns earned on investments of those contributions, and forfeitures of other participants' benefits that may be allocated to such participant's account. A description of the plan(s) including employee groups covered, the basis for determining contributions, and the nature and effects of significant matters affecting comparability of information for all periods presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Defined Contribution Postretirement Plan
-URI http://asc.fasb.org/extlink&oid=6510416

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

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