Stock-Based Awards - Tax Benefit Recognized (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jul. 27, 2013	Jul. 28, 2012	Jul. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation	$ 9,902	$ 6,952	$ 4,409
Tax benefit recognized in the statement of operations	$ 3,782	$ 2,412	$ 1,284

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration