Summary of Activity in Stock Option Plan (Detail) (USD $)	9 Months Ended
	Nov. 02, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Outstanding as of February 2, 2013	5,027,665
Options granted	816,690
Options exercised
Options forfeited	(201,938)
Options expired	(234,350)
Outstanding as of November 2, 2013	5,408,067
Options vested and expected to vest as of November 2, 2013	4,871,341
Exercisable as of November 2, 2013	1,950,319
Outstanding at February 2, 2013	$ 10.00
Options granted, Weighted-Average Exercise Price	$ 10.00
Options exercised, Weighted-Average Exercise Price
Options forfeited, Weighted-Average Exercise Price	$ 10.00
Options expired, Weighted-Average Exercise Price	$ 10.00
Outstanding as of November 2, 2013	$ 10.00
Options vested and expected to vest as of November 2, 2013	$ 10.00
Exercisable as of November 2, 2013	$ 10.00
Outstanding as of November 2, 2013, Weighted Average Remaining Contractual Term	4 years 7 months 6 days
Options vested and expected to vest as of November 2, 2013, Weighted Average Remaining Contractual Term	4 years 4 months 24 days
Exercisable as of November 2, 2013, Weighted Average Remaining Contractual Term	2 years 2 months 12 days