Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,917	$ 3,594
Accumulated depreciation	$ 101,766	$ 85,393
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	66,607,347	64,964,780
Treasury stock, at cost, shares	11,528,797	13,171,364