Subsequent Events (Details) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011	Aug. 31, 2012 Dividend Declared
Subsequent Events
Cash dividend announced on common stock (in dollars per share)	$ 0.20	$ 0.20	$ 0.40	$ 0.40	$ 0.20