Derivative Financial Instruments (Details 3) - USD ($)		3 Months Ended		9 Months Ended
		Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Amount of ineffectiveness recognized in net earnings on interest rate swap		$ 0		$ 0
Net after-tax derivative activity recorded in accumulated other comprehensive income (loss)
Beginning balance gain (loss)		(37,000)	$ 5,868,000	7,252,000	$ 7,157,000
Net gains (losses) from changes in cash flow hedges		3,305,000	330,000	(1,958,000)	3,988,000
Net gains reclassified to earnings		(593,000)	(2,158,000)	(2,619,000)	(7,105,000)
Ending balance gain		2,675,000	4,040,000	2,675,000	4,040,000
Cost of product sales
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain (loss) recognized in OCI on foreign exchange currency contracts		3,421,000	363,000	(2,229,000)	4,559,000
Gain (loss) reclassified from accumulated OCI into earnings on foreign exchange currency contracts	[1]	739,000	2,507,000	3,315,000	7,450,000
Other income/expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain (loss) recognized in OCI on foreign exchange currency contracts		260,000	46,000	(96,000)	276,000
Gain (loss) reclassified from accumulated OCI into earnings on foreign exchange currency contracts	[1]	45,000	(40,000)	126,000	776,000
Interest expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain (loss) recognized in OCI on interest rate swap		500,000	0	(317,000)	0
Loss reclassified from accumulated OCI into earnings on interest rate swap	[1]	(57,000)	0	(167,000)	0
Interest income
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Amount of ineffectiveness recognized in net earnings on foreign exchange currency contracts		$ 300,000	$ 100,000	$ 800,000	$ 100,000

[1] The Company recognized gains of $0.3 million and $0.8 million resulting from the ineffective portion related to foreign exchange currency contracts in interest income during the three and nine months ended October 29, 2016, respectively. The Company recognized gains of $0.1 million resulting from the ineffective portion related to foreign exchange currency contracts in interest income during the three and nine months ended October 31, 2015, respectively. There was no ineffectiveness recognized related to the interest rate swap during the three and nine months ended October 29, 2016.