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Note 5 - Fair Value (Tables)
9 Months Ended
Sep. 30, 2012
Fair Value, by Balance Sheet Grouping [Table Text Block]
December 31, 2011
 
Carrying
Amount
   
Estimated
Fair Value
 
(In thousands of dollars)
           
Financial Assets:
           
Cash and cash equivalents
  $ 75,816     $ 75,816  
FDIC insured bank certificates of deposit
    4,432       4,432  
Trading account securities
    2       2  
Securities available for sale
    342,184       342,184  
Federal Home Loan Bank stock
    7,266       7,266  
Loans held for sale
    349       349  
Loans, net
    962,890       944,756  
                 
Financial Liabilities:
               
Non-interest bearing deposits
    (214,904 )     (214,904 )
Interest bearing deposits
    (1,005,638 )     (1,000,580 )
Securities sold under agreements to repurchase and overnight borrowings
    (46,784 )     (46,784 )
Federal Home Loan Bank advances
    (19,457 )     (21,359 )
Subordinated debentures
    (36,084 )     (36,488 )
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
(In thousands of dollars)
 
Quoted Prices in Active Markets for Identical Assets
(Level 1)
   
Significant Other Observable Inputs
(Level 2)
   
Significant Unobservable Inputs
(Level 3)
   
Total
 
September 30, 2012
                       
Securities available for sale
                       
U.S. governmental agency bonds
  $ 0     $ 111,781     $ 0     $ 111,781  
Mortgage backed securities
    0       73,017       0       73,017  
Collateralized mortgage obligations
    0       67,385       0       67,385  
States and political subdivisions
    0       81,306       15,116       96,422  
Equity and other Securities
    39       0       1,585       1,624  
Total Securities available for sale
  $ 39     $ 333,489     $ 16,701     $ 350,229  
                                 
Trading equity securities
  $ 2     $ 0     $ 0     $ 2  
                                 
December 31, 2011
                               
Securities available for sale
                               
U.S. governmental agency bonds
  $ 0     $ 133,834     $ 0     $ 133,834  
Mortgage backed securities
    0       71,052       0       71,052  
Collateralized mortgage obligations
    0       57,845       0       57,845  
States and political subdivisions
    0       62,447       15,342       77,789  
Equity and other Securities
    92       0       1,572       1,664  
Total Securities available for sale
  $ 92     $ 325,178     $ 16,914     $ 342,184  
                                 
Trading equity securities
  $ 2     $ 0     $ 0     $ 2  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
(In thousands of dollars)
 
2012
   
2011
 
Balance at beginning of year
  $ 16,914     $ 10,833  
Total realized and unrealized gains/(losses) included in income
    0       0  
Total unrealized gains/(losses) included in other comprehensive income
    0       (48 )
Purchases of securities
    11,682       9,177  
Sales of securities
    0       0  
Calls and maturities
    (12,255 )     (5,062 )
Net transfers in/(out) of Level 3
    360       0  
Balance at September 30 of each year
  $ 16,701     $ 14,900  
Fair Value Measurements, Nonrecurring [Table Text Block]
(In thousands of dollars)
 
Balance at
September 30,
   
Quoted Prices in Active Markets for Identical Assets
(Level 1)
   
Significant Other Observable Inputs
(Level 2)
   
Significant Unobservable Inputs
(Level 3)
 
2012
                       
Impaired loans
  $ 35,746     $ 0     $ 0     $ 35,746  
Other real estate owned
  $ 3,001     $ 0     $ 0     $ 3,001  
Other repossessed assets
  $ 250     $ 0     $ 0     $ 250  
                                 
2011
                               
Impaired loans
  $ 38,178     $ 0     $ 0     $ 38,178  
Other real estate owned
  $ 7,367     $ 0     $ 0     $ 7,367  
Estimate of Fair Value, Fair Value Disclosure [Member]
 
Fair Value, by Balance Sheet Grouping [Table Text Block]
September 30, 2012
 
Carrying
Amount
   
Estimated
Fair Value
   
Quoted Prices in Active Markets
(Level 1)
   
Significant Other Observable Inputs
(Level 2)
   
Significant Unobservable Inputs
(Level 3)
 
(In thousands of dollars)
                             
Financial Assets:
                             
Cash and cash equivalents
  $ 71,975     $ 71,975     $ 71,975     $ 0     $ 0  
FDIC insured bank certificates of deposit
    2,927       2,927       2,927       0       0  
Trading account securities
    2       2       2       0       0  
Securities available for sale
    350,229       350,229       39       333,489       16,701  
Federal Home Loan Bank stock
    7,266       7,266       0       0       7,266  
Loans held for sale
    3,813       3,813       0       3,813       0  
Loans, net
    956,078       944,191       0       0       944,191  
                                         
Financial Liabilities:
                                       
Non-interest bearing deposits
    (229,437 )     (229,437 )     (229,437 )     0       0  
Interest bearing deposits
    (995,424 )     (998,015 )     0       0       (998,015 )
Securities sold under agreements to repurchase and overnight borrowings
    (45,927 )     (45,927 )     0       (45,927 )     0  
Federal Home Loan Bank advances
    (19,558 )     (21,275 )     0       0       (21,275 )
Subordinated debentures
    (36,084 )     (36,102 )     0       0       (36,102 )