Unaudited Pro Forma Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		5 Months Ended	6 Months Ended		11 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011	Jan. 28, 2012
Business Acquisition [Line Items]
Total revenues	$ 525,488	$ 435,015	$ 711,233	$ 1,029,010	$ 844,471
Net income (loss)	22,007	(10,544)	(24,338)	52,704	(40,488)	12,409
Total revenues, pro forma					844,471
Net income (loss), pro forma					$ 25,324