Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Numerator (in thousands):
Net income (loss) attributable to Christopher & Banks Corporation	$ 3,362	$ (265)	$ 5,979	$ 364
Income allocated to participating securities	(10)	0	(24)	(1)
Net income (loss) available to common shareholders	$ 3,352	$ (265)	$ 5,955	$ 363
Denominator (in thousands):
Weighted average common shares outstanding - basic	36,591,000	36,215,000	36,442,000	36,219,000
Dilutive shares	1,041,000	0	1,013,000	895,000
Weighted average common and common equivalent shares outstanding - diluted	37,632,000	36,215,000	37,455,000	37,114,000
Net earnings per common share:
Basic	$ 0.09	$ (0.01)	$ 0.16	$ 0.01
Diluted	$ 0.09	$ (0.01)	$ 0.16	$ 0.01
Stock options excluded from the shares used in the computation of diluted earnings per share because they were anti-dilutive	400,000	3,200,000	500,000	3,200,000