Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 28, 2019	Jan. 27, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, receivables	$ 618	$ 774
Accumulated depreciation	$ 203,320	$ 196,033
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	66,314,933	65,238,255
Treasury stock, shares	11,821,211	12,897,889