Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 27, 2014	Jan. 26, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 3,956	$ 3,825
Accumulated depreciation	$ 127,066	$ 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	67,225,178	67,283,221
Treasury stock, shares	10,910,966	10,852,923