Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Numerator
Total net earnings attributable to common shareholders	$ 59,393	$ 57,078	$ 86,277	$ 84,503
Net earnings allocated to participating securities (restricted stock and deferred stock units)	(624)	(711)	(1,101)	(978)
Net earnings attributable to common shareholders	$ 58,769	$ 56,367	$ 85,176	$ 83,525
Denominator
Basic weighted average common shares outstanding	50,711,000	51,489,000	50,822,000	51,703,000
Effect of dilutive securities:
Stock options and equity-based compensation (in shares)	221,000	303,000	262,000	291,000
Diluted weighted average common shares outstanding	50,932,000	51,792,000	51,084,000	51,994,000
Net earnings per common share attributable to common shareholders:
Basic (in dollars per share)	$ 1.16	$ 1.09	$ 1.68	$ 1.62
Diluted (in dollars per share)	$ 1.15	$ 1.09	$ 1.67	$ 1.61
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Anti-dilutive stock options (in shares)	400,000	300,000	300,000	400,000