Derivatives And Financial Instruments (Schedule Of Derivative Positions And Respective Fair Values) (Details) (USD $)	1 Months Ended
	Jul. 30, 2010	Oct. 31, 2011	Jan. 31, 2011
Derivatives, Fair Value [Line Items]
Payment made for termination of interest rate swap agreement	$ 21,700,000
Derivative assets, Fair Value		827,000	957,000
Derivative liabilities, Fair Value		1,426,000	1,926,000
Derivatives Designated As Hedging Instruments [Member] | Short-Term Foreign Currency Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount		24,036,000	22,390,000
Derivative liabilities, Notional Amount		49,762,000	21,250,000
Derivatives Not Designated As Hedging Instruments [Member] | Short-Term Foreign Currency Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount		9,523,000
Derivative liabilities, Notional Amount		22,165,000	33,341,000
Prepaid Expenses And Other Current Assets [Member] | Derivatives Designated As Hedging Instruments [Member] | Short-Term Foreign Currency Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value		814,000	957,000
Prepaid Expenses And Other Current Assets [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Short-Term Foreign Currency Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Fair Value		13,000
Other Current Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member] | Short-Term Foreign Currency Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities, Fair Value		670,000	396,000
Other Current Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Short-Term Foreign Currency Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities, Fair Value		$ 756,000	$ 1,530,000