Earnings 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
Numerator (in thousands):
Net (loss) income attributable to Christopher & Banks Corporation	$ (315)	$ 8,983	$ (2,467)	$ 14,962
Income allocated to participating securities		(27)		(45)
Net (loss) income available to common shareholders	$ (315)	$ 8,956	$ (2,467)	$ 14,917
Denominator (in thousands):
Weighted average common shares outstanding - basic	36,906	36,805	36,877	36,685
Dilutive shares		909		984
Weighted average common and common equivalent shares outstanding - diluted	36,906	37,714	36,877	37,669
Net (loss) earnings per common share:
Basic	$ (0.01)	$ 0.24	$ (0.07)	$ 0.41
Diluted	$ (0.01)	$ 0.24	$ (0.07)	$ 0.40
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive		300		300