Fair Value Measurements - Summary of Activity Recorded for Derivatives Using Level 3 Inputs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Aug. 03, 2013	May 04, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
Derivative Liability [Roll Forward]
Beginning balance as of beginning of period	$ 29,372	$ 20,082		$ 20,082
Loss on change in fair value	21,154	9,290	8,219	30,444	1,886
Ending balance as of end of period	$ 50,526	$ 29,372		$ 50,526