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Note 6 - Investment Securities Available for Sale (Tables)
6 Months Ended
Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   

June 30, 2015

 
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 

(Dollar amounts in thousands)

 

Cost

   

Gains

   

Losses

   

Value

 
                                 

U.S. government agency securities

  $ 22,404     $ 275     $ (457 )   $ 22,222  

Obligations of states and political subdivisions:

                               

Taxable

    1,991       129       -       2,120  

Tax-exempt

    101,595       2,652       (1,308 )     102,939  

Mortgage-backed securities in government-sponsored entities

    26,663       354       (335 )     26,682  

Private-label mortgage-backed securities

    2,500       215       -       2,715  

Total debt securities

    155,153       3,625       (2,100 )     156,678  

Equity securities in financial institutions

    750       149       -       899  

Total

  $ 155,903     $ 3,774     $ (2,100 )   $ 157,577  
   

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

  $ 2,121     $ 2,185  

Due after one year through five years

    12,763       13,021  

Due after five years through ten years

    17,263       17,548  

Due after ten years

    123,006       123,924  
                 

Total

  $ 155,153     $ 156,678  
Realized Gain (Loss) on Investments [Table Text Block]
   

For the Three Months

   

For the Six Months

 
(Dollar amounts in thousands)   Ended June 30,     Ended June 30,  
   

2015

   

2014

   

2015

   

2014

 

Proceeds from sales

  $ 1,721     $ 980     $ 3,312     $ 1,494  

Gross realized gains

    92       64       140       64  

Gross realized losses

    (70 )     -       (94 )     (6 )
Schedule of Unrealized Loss on Investments [Table Text Block]
   

June 30, 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

  $ 2,745     $ (79 )   $ 12,791     $ (378 )   $ 15,536     $ (457 )

Obligations of states and political subdivisions

    19,988       (457 )     11,586       (851 )     31,574       (1,308 )

Mortgage-backed securities in government-sponsored entities

    9,410       (139 )     7,305       (196 )     16,715       (335 )

Total

  $ 32,143     $ (675 )   $ 31,682     $ (1,425 )   $ 63,825     $ (2,100 )
   

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 )