Incentive Stock Option and Other Equity Plans Schedule of Nonvested RSU Activity (Details) (Restricted Stock Units (RSUs) [Member], USD $)	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
RSUs, Nonvested, Shares at Beginning of Year	86,000	0
RSUs, Nonvested, Weighted Average Grant Date Fair Value at Beginning of Year	$ 39.72	$ 0
RSUs, Granted, Shares	66,000	86,000
RSUs, Granted, Weighted Average Grant Date Fair Value	$ 48.88	$ 39.72
RSUs, Vested, Shares	(42,000)
RSUs, Vested, Weighted Average Grant Date Fair Value	$ 39.72
RSUs, Nonvested, Shares at End of Year	110,000	86,000
RSUs, Nonvested, Weighted Average Grant Date Fair Value at End of Year	$ 45.22	$ 39.72