Stock-Based Compensation - Summary of the Activity for Performance Unit Awards (Details) (Performance shares [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jul. 27, 2014	Jan. 26, 2014
Units
Beginning balance (in shares)	376
Performance units granted (in shares)	256
Performance units vested (in shares)	(93)
Performance units cancelled/forfeited (in shares)	(17)
Ending balance (in shares)	522	376
Weighted Average Grant Date Fair Value (per share)
Beginning balance (in dollars per share)	$ 28.50
Performance units granted (in dollars per share)	$ 24.74
Performance units vested (in dollars per share)	$ 23.36
Performance units forfeited (in dollars per share)	$ 25.51
Ending balance (in dollars per share)	$ 27.57	$ 28.50
Aggregate Unrecognized Compensation
Beginning balance	$ 3,893
Ending balance	7,577	3,893
Weighted Average Period Over Which Expected to be Recognized (in years)
Weighted average period over which expected to be recognized	1 year 11 months	1 year 4 months
Subject To Share Settlement [Member]
Units
Beginning balance (in shares)	192
Performance units granted (in shares)	128
Performance units vested (in shares)	(52)
Performance units cancelled/forfeited (in shares)	(9)
Ending balance (in shares)	259
Subject To Cash Settlement [Member]
Units
Beginning balance (in shares)	184
Performance units granted (in shares)	128
Performance units vested (in shares)	(41)
Performance units cancelled/forfeited (in shares)	(8)
Ending balance (in shares)	263
Recorded Liability
Beginning balance	1,305
Change in liability	(318)
Ending balance	$ 987