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Note 9 - Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 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)
   
5,256
      
(438
 )    
-
     
4,818
 
Balance at June 30, 2016
   $
6,221
    $
(498
 )   $
(273
 )   $
5,450
 
                                 
                                 
Balance at December 31, 2016
   $
(1,211
 )   $
(16
 )   $
(272
 )   $
(1,499
 )
                                 
Net current period other
comprehensive income gain (loss)
   
895
      
(5
 )    
-
     
890
  
Balance at June 30, 2017
   $
(316
 )   $
(21
 )   $
(272
 )   $
(609
 )