Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Oct. 26, 2014	Jan. 26, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 4,016	$ 3,825
Accumulated depreciation	$ 136,014	$ 112,610
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	78,136,144	78,136,144
Common stock, shares outstanding	66,690,299	67,283,221
Treasury stock, shares	11,445,845	10,852,923