Gift Cards (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 28, 2012	Jan. 29, 2011
Gift Cards [Abstract]
Recognized gift card breakage	$ 12,554	$ 10,685	$ 23,199	$ 20,599
Gift card liabilities	$ 367,555	$ 354,775	$ 367,555	$ 354,775