Stock-Based Compensation - Summary of the Activity for Stock Option Awards (Details) (Stock options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 26, 2015
Stock options [Member]
Number of Shares
Beginning balance (in shares)	1,763
Options granted (in shares)	170
Options exercised (in shares)	(114)
Options cancelled/forfeited (in shares)	(51)
Ending balance (in shares)	1,768
Exercisable at end of period (in shares)	1,032
Weighted Average Exercise Price (per share)
Beginning balance (in dollars per share)	$ 23.70
Options granted (in dollars per share)	$ 28.60
Options exercised (in dollars per share)	$ 15.60
Options cancelled/forfeited (in dollars per share)	$ 24.31
Ending balance (in dollars per share)	$ 24.68
Exercisable at end of period (in dollars per share)	$ 22.80
Aggregate Intrinsic Value
Beginning balance	$ 7,722
Options exercised	1,321
Ending balance	3,024
Exercisable at end of period	3,017
Aggregate Unrecognized Compensation
Beginning balance	4,688
Ending balance	$ 4,962
Number of Shares Exercisable
Exercisable at beginning of period (in shares)	986
Exercisable at end of period (in shares)	1,032
Weighted Average Contractual Term (in years)
Exercisable at end of period	2 years 5 months