Commitments and Contingencies - Schedule of Liability for Deferred Compensation (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 25, 2015
Schedule of liability for Deferred Compensation [Line Items]
Deferred compensation liability, current	$ 1,448	$ 527
Deferred Compensation Plan For Officers And Executives
Schedule of liability for Deferred Compensation [Line Items]
Total deferred compensation liabilities under this plan	19,424	19,768
Accrued liabilities | Deferred Compensation Plan For Officers And Executives
Schedule of liability for Deferred Compensation [Line Items]
Deferred compensation liability, current	1,448	527
Other long-term liabilities | Deferred Compensation Plan For Officers And Executives
Schedule of liability for Deferred Compensation [Line Items]
Deferred compensation liability, noncurrent	$ 17,976	$ 19,241