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Note 13 - Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2015
Disclosure Text Block [Abstract]  
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
  $ 3,392     $ (6,299 )   $ (2,907 )
Other comprehensive income before reclassifications, net of tax
    4,332       0     $ 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]
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
(Dollars 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
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
(Dollars in thousands)
             
Amortization of defined benefit pension items:
           
Actuarial losses
  $ (175 ) (1)  
Other expense
Prior service credits
    11   (1)  
Other expense
      (164 )    
Total before tax
      104      
Tax benefit
    $ (60 )    
Net of tax