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Note 7 - Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
 
 
Net unrealized
 
 
Net unrealized
 
 
Minimum
 
 
 
 
 
 
 
gains on
 
 
gains (losses)
 
 
pension
 
 
 
 
 
 
 
securities
 
 
on cash
 
 
liability
 
 
 
 
 
(in thousands)
 
available-for-sale
 
 
flow hedges
 
 
adjustment
 
 
Total
 
                                 
Balance at December 31, 2015
   $
965
     $
(60
 )   $
(273
 )   $
632
  
                                 
Net current period other comprehensive gain (loss)
   
3,653
      
(339
 )    
-
     
3,314
  
Balance at March 31, 2016
   $
4,618
     $
(399
 )   $
(273
 )   $
3,946
  
                                 
                                 
Balance at December 31, 2016
   $
(1,211
 )   $
(16
 )   $
(272
 )   $
(1,499
 )
                                 
Net current period other comprehensive income gain (loss)
   
689
      
85
      
-
     
774
  
Balance at March 31, 2017
   $
(522
 )   $
69
     $
(272
 )   $
(725
 )