XML 110 R82.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation and Benefit Plans, Fair Value Assumptions (Details 3) (USD $)	12 Months Ended
	Feb. 01, 2013	Feb. 03, 2012	Jan. 28, 2011
Assumptions for weighted average fair value of stock options
Weighted-average grant date fair value of stock options granted per option	$ 4.88	$ 5.13	$ 5.01
Expected term (in years)	4 years 10 months	4 years 7 months 6 days	4 years 6 months
Risk-free interest rate (U.S. Government Treasury Note)	1.00%	1.90%	2.20%
Volatility	37.00%	36.00%	37.00%
Dividend Yield	2.70%	0.00%	0.00%
Acquisitions
Assumptions for weighted average fair value of stock options
Weighted-average grant date fair value of stock options granted per option	$ 3.09
Expected term (in years)	4 years 6 months
Risk-free interest rate (U.S. Government Treasury Note)	1.30%
Volatility	36.00%
Dividend Yield	3.20%

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References+ Details