Consolidated Balance Sheets (Parenthetical) - $ / shares None in scaling factor is -9223372036854775296	Aug. 01, 2015	Jan. 31, 2015
Statement of Financial Position [Abstract]
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, without par value (in dollars per share)
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	40,789,902	40,695,295
Common stock, shares outstanding	38,594,537	40,074,310