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Note 4 - Derivative Instruments and Hedging Activities (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule Of Derivative Assets (Liabilities) at Fair Value [Table Text Block]
   
March 31
,
201
9
    
December 31,
201
8
  
Commodity contracts
   $
0
     $
(160
 )
Foreign currency contracts
    
(221
 )    
(117
 )
Interest rate swaps
    
1,383
      
8,307