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Note 6 - Investment Securities Available For Sale (Tables)
3 Months Ended
Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   

March 31, 2015

 
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 

(Dollar amounts in thousands)

 

Cost

   

Gains

   

Losses

   

Value

 
                                 

U.S. government agency securities

  $ 22,697     $ 383     $ (159 )   $ 22,921  

Obligations of states and political subdivisions:

                               

Taxable

    2,952       305       -       3,257  

Tax-exempt

    89,544       3,749       (453 )     92,840  

Mortgage-backed securities in government-sponsored entities

    28,055       573       (111 )     28,517  

Private-label mortgage-backed securities

    2,500       225       -       2,725  

Total debt securities

    145,748       5,235       (723 )     150,260  

Equity securities in financial institutions

    750       149       -       899  

Total

  $ 146,498     $ 5,384     $ (723 )   $ 151,159  
   

December 31, 2014

 
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 
   

Cost

   

Gains

   

Losses

   

Value

 
                                 

U.S. government agency securities

  $ 23,035     $ 311     $ (450 )   $ 22,896  

Obligations of states and political subdivisions:

                               

Taxable

    2,953       226       -       3,179  

Tax-exempt

    91,916       3,803       (553 )     95,166  

Mortgage-backed securities in government-sponsored entities

    29,150       475       (234 )     29,391  

Private-label mortgage-backed securities

    2,672       247       -       2,919  

Total debt securities

    149,726       5,062       (1,237 )     153,551  

Equity securities in financial institutions

    750       33       -       783  

Total

  $ 150,476     $ 5,095     $ (1,237 )   $ 154,334  
Investments Classified by Contractual Maturity Date [Table Text Block]
   

Amortized

   

Fair

 

(Dollar amounts in thousands)

 

Cost

   

Value

 
                 

Due in one year or less

  $ 998     $ 1,014  

Due after one year through five years

    12,447       12,820  

Due after five years through ten years

    20,148       20,888  

Due after ten years

    112,155       115,538  
                 

Total

  $ 145,748     $ 150,260  
Realized Gain (Loss) on Investments [Table Text Block]

(Dollar amounts in thousands)

  For the Three Months Ended March 31,  
   

2015

   

2014

 

Proceeds from sales

  $ 1,590     $ 514  

Gross realized gains

    48       -  

Gross realized losses

    (24 )     (6 )
Schedule of Unrealized Loss on Investments [Table Text Block]
   

March 31, 2015

 
   

Less than Twelve Months

   

Twelve Months or Greater

   

Total

 
           

Gross

           

Gross

           

Gross

 
   

Fair

   

Unrealized

   

Fair

   

Unrealized

   

Fair

   

Unrealized

 

(Dollar amounts in thousands)

 

Value

   

Losses

   

Value

   

Losses

   

Value

   

Losses

 
                                                 

U.S. government agency securities

  $ 1,988     $ (12 )   $ 13,101     $ (147 )   $ 15,089     $ (159 )

Obligations of states and political subdivisions

    4,682       (34 )     12,767       (419 )     17,449       (453 )

Mortgage-backed securities in government-sponsored entities

    -       -       7,815       (111 )     7,815       (111 )
Total   $ 6,670     $ (46 )   $ 33,683     $ (677 )   $ 40,353     $ (723 )
   

December 31, 2014

 
   

Less than Twelve Months

   

Twelve Months or Greater

   

Total

 
           

Gross

           

Gross

           

Gross

 
   

Fair

   

Unrealized

   

Fair

   

Unrealized

   

Fair

   

Unrealized

 
   

Value

   

Losses

   

Value

   

Losses

   

Value

   

Losses

 
                                                 

U.S. government agency securities

  $ -     $ -     $ 15,734     $ (450 )   $ 15,734     $ (450 )

Obligations of states and political subdivisions

    2,406       (10 )     18,232       (543 )     20,638       (553 )

Mortgage-backed securities in government-sponsored entities

    -       -       16,774       (234 )     16,774       (234 )
Total   $ 2,406     $ (10 )   $ 50,740     $ (1,227 )   $ 53,146     $ (1,237 )