Derivative Financial Instruments (Details 3) - USD ($)		12 Months Ended
		Jan. 28, 2017	Jan. 30, 2016	Jan. 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
Net after-tax derivative activity recorded in accumulated other comprehensive income (loss)
Beginning balance gain		7,252,000	$ 7,157,000
Net gains from changes in cash flow hedges		1,059,000	7,944,000
Net gains reclassified to earnings		(2,911,000)	(7,849,000)
Ending balance gain		5,400,000	7,252,000	$ 7,157,000
Cost of product sales
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain recognized in OCI on foreign exchange currency contracts		0	9,301,000	6,962,000
Gain (loss) reclassified from accumulated OCI into earnings on foreign exchange currency contracts	[1]	3,518,000	8,314,000	(272,000)
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 on foreign exchange currency contracts		227,000	500,000	922,000
Gain (loss) reclassified from accumulated OCI into earnings on foreign exchange currency contracts	[1]	301,000	833,000	165,000
Interest expense
Gains (losses) before taxes recognized on the derivative instruments designated as cash flow hedges in OCI and net earnings
Gain recognized in OCI on interest rate swap		660,000
Loss reclassified from accumulated OCI into earnings on interest rate swap	[1]	(216,000)
Interest income/expense
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		$ 900,000	$ 100,000	$ (300,000)

[1] The Company recognized gains (losses) of $0.9 million, $0.1 million and $(0.3) million resulting from the ineffective portion related to foreign exchange currency contracts in interest income (expense) during fiscal 2017, fiscal 2016 and fiscal 2015, respectively. There was no ineffectiveness recognized related to the interest rate swap during fiscal 2017.