Commitments and Contingencies - Schedule of Compensation Expense and Forfeitures Under Deferred Compensation Plan (Details) (Deferred Compensation Plan For Officers And Executives, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 25, 2015	Jan. 26, 2014	Jan. 27, 2013
Deferred Compensation Plan For Officers And Executives
Schedule of compensation expense and forfeitures under deferred compensation plan [Line Items]
Forfeitures	$ (112)	$ (180)	$ 0
Compensation expense, excluding forfeitures	2,449	2,644	1,839
Compensation expense, net of forfeitures	$ 2,337	$ 2,464	$ 1,839