Commitments and Contingencies - Additional Information (Detail) (Guez Defendants, USD $) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended		3 Months Ended
	Dec. 10, 2010	Apr. 30, 2011	Feb. 28, 2011	Apr. 30, 2011
Guez Defendants
Loss Contingencies [Line Items]
Judgment amount of combined liability to the Company	$ 50
Rate of interest on judgment amount	10.00%
Litigation settlement, gross gain	26.0
Litigation Settlement, Expense	10.3
Litigation settlement, gross gain secured by Sureties	16.7
Proceeds from legal settlements		$ 3.7	$ 13.0	$ 27.7