Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May. 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Numerator (in thousands):
Net (loss) income attributable to Christopher & Banks Corporation	$ (46,627)	$ (315)	$ (710)	$ (1,442)	$ 32,164	$ 8,983	$ 3,362	$ 2,616	$ (49,094)	$ 47,126	$ 8,690
Income allocated to participating securities										(155)	(32)
Net (loss) income available to common shareholders									$ (49,094)	$ 46,971	$ 8,658
Denominator (in thousands):
Weighted average common shares outstanding - basic									36,886	36,819	36,246
Dilutive shares										934	898
Weighted average common and common equivalent shares outstanding - diluted									36,886	37,753	37,144
Net (loss) earnings per common share:
Basic	$ (1.26)	$ (0.01)	$ (0.02)	$ (0.04)	$ 0.87	$ 0.24	$ 0.09	$ 0.07	$ (1.33)	$ 1.28	$ 0.24
Diluted	$ (1.26)	$ (0.01)	$ (0.02)	$ (0.04)	$ 0.86	$ 0.24	$ 0.09	$ 0.07	$ (1.33)	$ 1.24	$ 0.23
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive									2,300	300	500