Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010	Oct. 29, 2011	Oct. 30, 2010
Numerator
Total net earnings attributable to common shareholders	$ 39,877	$ 25,259	$ 124,380	$ 81,783
Net earnings allocated to participating securities (restricted stock and deferred stock units)	(516)	(236)	(1,496)	(758)
Net earnings attributable to common shareholders	$ 39,361	$ 25,023	$ 122,884	$ 81,025
Denominator
Basic weighted average common shares outstanding	51,110	52,702	51,505	52,589
Effect of dilutive securities:
Stock options and equity-based compensation	229	193	271	187
Diluted weighted average common shares outstanding	51,339	52,895	51,776	52,776
Net earnings per common share attributable to common shareholders:
Basic	$ 0.77	$ 0.47	$ 2.39	$ 1.54
Diluted	$ 0.77	$ 0.47	$ 2.37	$ 1.54