EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Oct. 27, 2012	Nov. 26, 2011	Oct. 29, 2011	Oct. 27, 2012	Nov. 26, 2011	Oct. 29, 2011
Numerator (in thousands):
Net income (loss) attributable to Christopher & Banks Corporation	$ 3,583	$ (28,239)	$ (13,749)	$ (12,026)	$ (39,331)	$ (28,131)
Income allocated to participating securities	(61)	(13)			(39)
Net income (loss) available to common shareholders	$ 3,522	$ (28,252)		$ (12,026)	$ (39,370)
Denominator (in thousands):
Weighted average common shares outstanding - basic	35,643,000	35,585,000	35,578,000	35,626,000	35,542,000	35,527,000
Dilutive shares	387,000
Weighted average common and common equivalent shares outstanding - diluted	36,030,000	35,585,000	35,578,000	35,626,000	35,542,000	35,527,000
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.10	$ (0.79)	$ (0.39)	$ (0.34)	$ (1.11)	$ (0.79)
Diluted (in dollars per share)	$ 0.10	$ (0.79)	$ (0.39)	$ (0.34)	$ (1.11)	$ (0.79)
Stock options excluded from the shares used in the computation of diluted earnings per share	1,100,000	2,800,000		1,800,000	2,800,000