Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Basic Earnings per Share:
Net income	$ 9,386	$ 10,817	$ 24,599	$ 22,552
Amount allocated to participating securities	(187)	(202)	(479)	(405)
Net income available for basic common shares and basic earnings per share	$ 9,199	$ 10,615	$ 24,120	$ 22,147
Net income available for basic common shares and basic earnings per share, Shares	19,444	19,716	19,542	19,844
Net income available for basic common shares and basic earnings per share, Per Share Amount	$ 0.47	$ 0.54	$ 1.23	$ 1.12
Diluted Earnings per Share:
Net income	$ 9,386	$ 10,817	$ 24,599	$ 22,552
Amount allocated to participating securities	(187)	(202)	(479)	(405)
Adjustment for dilutive potential common shares	$ 0	$ 0	$ 0	$ 0
Adjustment for dilutive potential common shares, Shares	8	13	11	15
Net income available for diluted common shares and diluted earnings per share	$ 9,199	$ 10,615	$ 24,120	$ 22,147
Net income available for diluted common shares and diluted earnings per share, Shares	19,452	19,729	19,553	19,859
Net income available for diluted common shares and diluted earnings per share, Per Share Amount	$ 0.47	$ 0.54	$ 1.23	$ 1.12