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Derivative Instruments (Tables)
3 Months Ended
Mar. 31, 2012
Derivative Instruments [Abstract]  
Summary Of Gain (Loss) Recognized And The Amounts And Location Of Income (Expense) And Gain (Loss) Reclassified Into Income For Interest Rate Contracts And Foreign Currency Contracts
     Gain (Loss)
Recognized  in
Other
Comprehensive
Income
    (Expense)
and Gain
Reclassified into
Income
       
     Three Months Ended March 31,     Income
Statement Caption
 
         2012              2011             2012             2011        
     (In thousands)        

Interest rate agreements

   $       $ 955      $ (1,925   $ (1,560     Interest expense   

Foreign exchange contracts

             (55            120        Sales