Note 4. Derivative Financial Instruments (Details) - Effects of Derivative Instruments on Income and Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
Effects of Derivative Instruments on Income and Accumulated Other Comprehensive Income [Abstract]
Gains Reclassified from Accumulated Other Comprehensive Income into Earnings - Location	Operating expenses and cost of revenue	Operating expenses and cost of revenue	Operating expenses and cost of revenue	Operating expenses and cost of revenue
Gains (Losses) Recognized in Earnings on Derivatives (Including Ineffective Portion) - Amount	$ (34)	$ (513)	$ 251	$ (430)
Gains (Losses) Recognized in Earnings on Derivatives (Including Ineffective Portion) - Location	Interest and other income, net	Interest and other income, net	Interest and other income, net	Interest and other income, net