Derivative Financial Instruments (Details 3) - USD ($)		3 Months Ended		9 Months Ended
		Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
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	$ 0	$ 0	$ 0
Net after-tax derivative activity recorded in accumulated other comprehensive income (loss)
Beginning balance gain (loss)		(8,751,000)	(37,000)	5,400,000	7,252,000
Net gains (losses) from changes in cash flow hedges		2,749,000	3,305,000	(10,220,000)	(1,958,000)
Net (gains) losses reclassified to earnings (loss)		235,000	(593,000)	(947,000)	(2,619,000)
Ending balance gain (loss)		(5,767,000)	2,675,000	(5,767,000)	2,675,000
Cost of product sales
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)
Gain (loss) recognized in OCI on foreign exchange currency contracts		3,215,000	3,421,000	(10,601,000)	(2,229,000)
Gain (loss) reclassified from accumulated OCI into earnings (loss) on foreign exchange currency contracts	[1]	81,000	739,000	1,360,000	3,315,000
Other income/expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)
Gain (loss) recognized in OCI on foreign exchange currency contracts		38,000	260,000	(958,000)	(96,000)
Gain (loss) reclassified from accumulated OCI into earnings (loss) on foreign exchange currency contracts	[1]	(337,000)	45,000	(244,000)	126,000
Interest expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings (loss)
Gain (loss) recognized in OCI on interest rate swap		134,000	500,000	(143,000)	(317,000)
Loss reclassified from accumulated OCI into earnings (loss) on interest rate swap	[1]	(57,000)	(57,000)	(119,000)	(167,000)
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 earnings (loss) on foreign exchange currency contracts		$ 500,000	$ 300,000	$ 2,000,000	$ 800,000

[1] The Company recognized gains of $0.5 million and $2.0 million resulting from the ineffective portion related to foreign exchange currency contracts in interest income during the three and nine months ended October 28, 2017, respectively. 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. There was no ineffectiveness recognized related to the interest rate swap during the three and nine months ended October 28, 2017 and October 29, 2016.