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Note 11 - Accumulated Other Comprehensive Loss (Tables)
 6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Defined
    
 
 
 
  
 
 
 
   
Benefit
    
 
 
 
  
 
 
 
   
Pension
    
Interest
    
 
 
 
   
Plan
   
Rate Swaps
   
Total
 
Balance at December 31, 2018
   $
(3,003
 )   $
328
     $
(2,675
 )
Other comprehensive income before reclassifications
    
28
      
24
      
52
  
Reclassifications from accumulated comprehensive income (loss) to net income
    
174
      
(323
 )    
(149
 )
Net other comprehensive income (loss)
    
202
      
(299
 )    
(97
 )
Balance at June 30, 2019
   $
(2,801
 )   $
29
     $
(2,772
 )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
June 30,
   
June 30,
 
   
2019
   
2018
   
2019
   
2018
 
Amortization of defined benefit plan pension items:
                                
Amortization of loss
   $
122
     $
91
     $
243
     $
182
  
Income tax effect
    
(35
 )    
(26
 )    
(69
 )    
(52
 )
After tax
    
87
      
65
      
174
      
130
  
                                 
Amortization of gain on interest rate swap:
                                
Reclassification to interest expense
    
(224
 )    
(97
 )    
(451
 )    
(122
 )
Income tax effect
    
64
      
28
      
128
      
35
  
After tax
    
(160
 )    
(69
 )    
(323
 )    
(87
 )
Total reclassifications, net of income tax
   $
(73
 )   $
(4
 )   $
(149
 )   $
43