Stock-Based Awards - Tax Benefit Recognized (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Oct. 26, 2013	Oct. 27, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation	$ 3,506	$ 2,266
Tax benefit recognized in the statement of operations	$ 1,299	$ 765

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

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