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Note 14 - Accumulated Other Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
    Unrealized Gains 
and (Losses) on 
Available for Sale
Securities
  Defined Benefit
Pension Items
  Total
    (In thousands)
             
Beginning balance, net of tax   $ (521 )   $ (5,041 )   $ (5,562 )
Other comprehensive income before reclassifications, net of tax     6,770       -     $ 6,770  
                         
Amounts reclassified from accumulated other comprehensive income, net of tax     -       103       103  
                         
Net current period other comprehensive income, net of tax     6,770       103       6,873  
                         
Ending balance, net of tax   $ 6,249     $ (4,938 )   $ 1,311  
    Unrealized Gains 
and (Losses) on 
Available for Sale
Securities
  Defined Benefit
Pension Items
  Total
    (In thousands)
             
Beginning balance, net of tax   $ 3,392     $ (6,299 )   $ (2,907 )
Other comprehensive income before reclassifications, net of tax     4,332       -     $ 4,332  
                         
Amounts reclassified from accumulated other comprehensive income, net of tax     -       168       168  
                         
Net current period other comprehensive income, net of tax     4,332       168       4,500  
                         
Ending balance, net of tax   $ 7,724     $ (6,131 )   $ 1,593  
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
For the three months ended March 31, 2016
         
Details about Accumulated Other
Comprehensive Income Components
  Amounts Reclassified from
Accumulated Other
Comprehensive Income
  Affected Line Item in the Statement
Where Net Income is Presented
    (In thousands)    
         
Amortization of defined benefit pension items:            
Actuarial losses   $ (192 )  (1)   Other expense
Prior service credits     11    (1)   Other expense
      (181 )   Total before tax
      78     Tax benefit
    $ (103 )   Net of tax
For the three months ended March 31, 2015
         
Details about Accumulated Other
Comprehensive Income Components
  Amounts Reclassified from
Accumulated Other
Comprehensive Income
  Affected Line Item in the Statement
Where Net Income is Presented
    (In thousands)    
         
Amortization of defined benefit pension items:            
Actuarial losses   $ (307 )  (1)   Other expense
Prior service credits     11    (1)   Other expense
      (296 )   Total before tax
      128     Tax benefit
    $ (168 )   Net of tax