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Derivatives And Risk Management (Schedule Of Fair Value Of Balance Sheet Derivatives) (Details) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Derivative [Line Items]    
Existing gains or losses expected to be reclassified into earnings within the next twelve months $ 1,400,000  
Prepaid Expenses And Other Current Assets [Member]
    
Derivative [Line Items]    
Cash flow hedging instruments, Asset Derivatives 4,573,000 9,719,000
Accrued Expenses - Other [Member]
    
Derivative [Line Items]    
Cash flow hedging instruments, Liability Derivatives 2,366,000 3,204,000
Intangible And Other Assets - Net [Member]
    
Derivative [Line Items]    
Cash flow hedging instruments, Asset Derivatives 410,000 895,000
Other Long-Term Liabilities [Member]
    
Derivative [Line Items]    
Cash flow hedging instruments, Liability Derivatives 302,000 382,000
Foreign Exchange Forward Contracts [Member]
    
Derivative [Line Items]    
Cash flow hedging instruments, Asset Derivatives 4,983,000 10,614,000
Cash flow hedging instruments, Liability Derivatives $ 2,668,000 $ 3,586,000