Share Based Compensation (Stock Option activity) (Details) (USD $)	12 Months Ended
	Jan. 28, 2012
Stock option activity
Number of Shares Outstanding at January 29, 2011	2,316,648
Number of Shares Outstanding, Weighted average Exercise Price	$ 39.51
Exercised, Number of Shares	(1,573,351)
Exercised, Weighted average Exercise Price	$ 29.62
Forfeited or cancelled, Number of Shares	(28,300)
Forfeited or cancelled, Weighted-Average Exercise Price	$ 53.96
Number of Shares Outstanding at October 29, 2011	714,997
Number of Shares Outstanding, Weighted average Exercise Price	$ 60.72
Number of Shares Outstanding, Aggregate Intrinsic Value	$ 3,958,608
Number of Shares Outstanding, Weighted- Average Remaining Contractual Life	4.7
Stock options exercisable at October 29, 2011	639,447
Stock options exercisable, Weighted-Average Exercise Price	$ 60.16
Stock options exercisable, Aggregate Intrinsic Value	3,508,038
Stock options exercisable, Weighted-Average Remaining Contractual Life	4.6
Stock options expected to become exercisable in the future as of October 29, 2011	74,320
Stock options expected to become exercisable in the future as of October 29, 2011, Aggregate Intrinsic Value	$ 430,461
Stock options expected to become exercisable in the future as of October 29, 2011, Weighted Average Exercise Price	$ 65.79
Stock options expected to become exercisable in the future as of October 29, 2011, Weighted Average Remaining Contractual Life	6.3