Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 28, 2013	Jan. 27, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 5,065	$ 4,917
Accumulated depreciation	$ 106,611	$ 101,766
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	67,362,012	66,607,347
Treasury stock, shares	10,774,132	11,528,797