Note 1. Organization and Summary of Significant Accounting Policies (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jul. 28, 2012	Jan. 28, 2012
Gross Intangible Assets, Reclassified (in Dollars)		$ 22.2
Accumulated Amortization, Reclassifications of Intangible Assets (in Dollars)		$ (5.9)
Income Tax Examination, Likelihood of Unfavorable Settlement	An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained.
Minimum [Member]
Property, Plant and Equipment, Useful Life	1 year
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	5 years
Finite-Lived Intangible Asset, Useful Life	3 years