Derivative Financial Instruments (Details 3) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Net after-tax derivative activity recorded in accumulated other comprehensive income (loss)
Beginning balance gain (loss)		$ 5,868	$ 366	$ 7,157	$ (113)
Net gains from changes in cash flow hedges		330	3,805	3,988	3,099
Net (gains) losses reclassified to earnings		(2,158)	713	(7,105)	1,898
Ending balance gain		4,040	4,884	4,040	4,884
Foreign exchange currency cash flow hedge unrealized gain to be recognized in cost of product sales or other income over the following 12 months		3,200		3,200
Cash flow hedges | Cost of product sales
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain recognized in OCI		363	3,869	4,559	3,163
Gain (loss) reclassified from accumulated OCI into earnings	[1]	2,507	(800)	7,450	(1,559)
Cash flow hedges | Other income/expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain recognized in OCI		46	487	276	381
Gain (loss) reclassified from accumulated OCI into earnings	[1]	$ (40)	$ 0	$ 776	$ (56)

[1] The ineffective portion was immaterial during the three and nine months ended October 31, 2015 and November 1, 2014 and was recorded in net earnings and included in interest income/expense.