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Note 11 - Other Comprehensive Loss ("OCL") (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Details about OCL
Components
 
Amount Reclassified
from
OC
L
for the
three months ended
June 30, 2017
 
 
Amount
Reclassified from
OCL
for the six
months ended
June 30, 2017
 
  
Affected Line Item
in the Statement of
Operations
Losses on cash flow hedges
 
 
 
 
 
 
 
 
  
 
Commodity derivative contracts
   $
1,472
     $
2,665
    
Fuel expense
     
(567
 )    
(1,026
 )  
Income tax benefit
    $
905
    $
1,639
    
Net of tax
                     
Interest rate swap contract
   $
118
     $
249
    
Interest expense
     
(45
 )    
(96
 )  
Income tax benefit
    $
73
     $
153
    
Net of tax