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Derivative Instruments (Schedule Of Fair Value Amounts Of Derivative Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2010
Accrued Expenses [Member] | Interest Rate Exchange Agreements [Member]
 
Derivative Instruments, Gain (Loss) [Line Items]  
Fair Value Liabilities $ (2,328)
Other Current Assets [Member] | Foreign Exchange Contracts [Member]
 
Derivative Instruments, Gain (Loss) [Line Items]  
Fair Value Assets $ 176