Derivative Financial Instruments (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010	Oct. 29, 2011	Oct. 30, 2010
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in other comprehensive income ("OCI") and net earnings
Foreign exchange currency cash flow hedge unrealized gain to be recognized in other expense or cost of product sales over the following 12 months	$ 100,000		$ 100,000
Net after-tax derivative activity recorded in accumulated other comprehensive income
Beginning balance (loss) gain	(5,619,000)	2,902,000	(1,789,000)	1,845,000
Net gains (losses) from changes in cash flow hedges	3,059,000	(3,178,000)	(3,366,000)	(1,623,000)
Net losses (gains) reclassified to income	3,027,000	(3,321,000)	5,622,000	(3,819,000)
Ending balance gain (loss)	467,000	(3,597,000)	467,000	(3,597,000)
Cost of sales
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in other comprehensive income ("OCI") and net earnings
Gain/(Loss) Recognized in OCI	3,970,000	(3,570,000)	(3,239,000)	(2,563,000)
Gain/(Loss) Reclassified from Accumulated OCI into Income/(Loss)	(3,470,000)	3,475,000	(6,540,000)	2,795,000
Other income/expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in other comprehensive income ("OCI") and net earnings
Gain/(Loss) Recognized in OCI	26,000	(41,000)	(585,000)	636,000
Gain/(Loss) Reclassified from Accumulated OCI into Income/(Loss)	$ (20,000)	$ 258,000	$ (9,000)	$ 1,240,000