Fair Value Measurements - Summary of Activity Recorded for Derivatives Using Level 3 Inputs (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Oct. 31, 2015	Aug. 01, 2015	May. 02, 2015	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	Oct. 31, 2015	Nov. 01, 2014
Derivative Liability [Roll Forward]
Beginning balance as of beginning of period	$ 3,650	$ 19,367	$ 28,448	$ 19,061	$ 29,495	$ 30,720	$ 28,448	$ 30,720
Loss (Gain) on change in fair value	(2,718)	15,717	(9,081)	(4,881)	10,434	(1,225)	(27,516)	(16,540)
Ending balance as of end of period	$ 932	$ 3,650	$ 19,367	$ 14,180	$ 19,061	$ 29,495	$ 932	$ 14,180