Stock Option Transactions (Detail) (USD $)	3 Months Ended
	May 03, 2014
Number of Shares
Options Outstanding at End of Period	4,257,239
Common Class A
Number of Shares
Options Outstanding at Beginning of Period	4,619,323
Options Issued	65,233
Options Exercised	(419,980)	[1]
Options Forfeited	(7,337)
Options Outstanding at End of Period	4,257,239
Weighted Average Exercise Price Per Share
Options Outstanding at Beginning of Period	$ 3.25
Options Issued	$ 27.65
Options Exercised	$ 1.77	[1]
Options Forfeited	$ 0.79
Options Outstanding at End of Period	$ 3.78

[1] Options exercised during the three months ended May 3, 2014 had a total intrinsic value of $10.5 million.