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Derivative Financial Instruments (Details 3) - USD ($)
3 Months Ended
Apr. 30, 2016
May. 02, 2015
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)    
Amount of ineffectiveness recognized in net earnings (loss) on interest rate swap $ 0  
Net after-tax derivative activity recorded in accumulated other comprehensive income (loss)    
Beginning balance gain 7,252,000 $ 7,157,000
Net losses from changes in cash flow hedges (9,880,000) (926,000)
Net gains reclassified to earnings (loss) (1,145,000) (1,935,000)
Ending balance gain (loss) (3,773,000) 4,296,000
Cost of product sales    
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)    
Loss recognized in OCI on foreign exchange currency contracts (11,412,000) (1,147,000)
Gain reclassified from accumulated OCI into earnings (loss) on foreign exchange currency contracts [1] 1,435,000 1,750,000
Other income/expense    
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)    
Loss recognized in OCI on foreign exchange currency contracts (699,000) (148,000)
Gain reclassified from accumulated OCI into earnings (loss) on foreign exchange currency contracts [1] 32,000 486,000
Interest expense    
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)    
Loss recognized in OCI on interest rate swap (132,000) 0
Loss reclassified from accumulated OCI into earnings (loss) on interest rate swap [1] (51,000) $ 0
Interest income    
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)    
Amount of ineffectiveness recognized in net earning (loss) on foreign exchange currency contracts $ 500,000  
[1] The Company recognized gains of $0.5 million resulting from the ineffective portion related to foreign exchange currency contracts in interest income during the three months ended April 30, 2016. The ineffective portion related to foreign exchange currency contracts was immaterial during the three months ended May 2, 2015. There was no ineffectiveness recognized related to the interest rate swap during the three months ended April 30, 2016.