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Investments (Tables)
 3 Months Ended
Mar. 31, 2013
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale Securities [Table Text Block]

A summary of investment securities available-for-sale is as follows:

 

    As of March 31, 2013  
          Gross     Gross        
    Amortized     unrealized     unrealized     Estimated  
(Dollars in thousands)   cost     gains     losses     fair value  
                         
U. S. treasury securities   $ 500     $ 1     $ -     $ 501  
U. S. federal agency obligations     14,598       46       (24 )     14,620  
Municipal obligations, tax exempt     79,495       3,293       (61 )     82,727  
Municipal obligations, taxable     47,598       889       (99 )     48,388  
Mortgage-backed securities     77,135       926       (72 )     77,989  
Common stocks     602       405       -       1,007  
Certificates of deposit     6,754       -       -       6,754  
Total   $ 226,682     $ 5,560     $ (256 )   $ 231,986  

 

    As of December 31, 2012  
          Gross     Gross        
    Amortized     unrealized     unrealized     Estimated  
(Dollars in thousands)   cost     gains     losses     fair value  
                         
U. S. federal agency obligations   $ 8,804     $ 50     $ (6 )   $ 8,848  
Municipal obligations, tax exempt     73,699       3,618       (31 )     77,286  
Municipal obligations, taxable     37,334       818       (10 )     38,142  
Mortgage-backed securities     81,113       889       (154 )     81,848  
Common stocks     602       301       (1 )     902  
Certificates of deposit     6,274       -       -       6,274  
Total   $ 207,826     $ 5,676     $ (202 )   $ 213,300  
Available For Sale Securities Continuous Unrealized Loss Position Fair Value [Table Text Block]

Certain of the Company’s investment securities have unrealized losses, or are temporarily impaired. This temporary impairment represents the estimated amount of loss that would be realized if the securities were sold on the valuation date. Securities which are temporarily impaired are shown below, along with the length of the impairment period.

 

          As of March 31, 2013  
(Dollars in thousands)         Less than 12 months     12 months or longer     Total  
    No. of     Fair     Unrealized     Fair     Unrealized     Fair     Unrealized  
    securities     value     losses     value     losses     value     losses  
U. S. federal agency obligations     3     $ 3,727     $ (24 )   $ -     $ -     $ 3,727     $ (24 )
Municipal obligations, tax exempt     27       5,962       (46 )     1,678       (15 )     7,640       (61 )
Municipal obligations, taxable     28       11,170       (95 )     782       (4 )     11,952       (99 )
Mortgage-backed securities     15       14,620       (72 )     -       -       14,620       (72 )
Total     73     $ 35,479     $ (237 )   $ 2,460     $ (19 )   $ 37,939     $ (256 )

 

          As of December 31, 2012  
(Dollars in thousands)         Less than 12 months     12 months or longer     Total  
    No. of     Fair     Unrealized     Fair     Unrealized     Fair     Unrealized  
    securities     value     losses     value     losses     value     losses  
U. S. federal agency obligations     2     $ 2,241     $ (6 )   $ -     $ -     $ 2,241     $ (6 )
Municipal obligations, tax exempt     16       4,669       (31 )     -       -       4,669       (31 )
Municipal obligations, taxable     8       2,948       (8 )     209       (2 )     3,157       (10 )
Mortgage-backed securities     24       27,974       (154 )     -       -       27,974       (154 )
Common stocks     1       21       (1 )     -       -       21       (1 )
Total     51     $ 37,853     $ (200 )   $ 209     $ (2 )   $ 38,062     $ (202 )
Available For Sale Securities Debt Maturities [Table Text Block]

Maturities of investment securities at March 31, 2013 are as follows:

 

(Dollars in thousands)   Amortized     Estimated  
    cost     fair value  
Due in less than one year   $ 16,168     $ 16,252  
Due after one year but within five years     134,263       136,233  
Due after five years but within ten years     63,453       65,716  
Due after ten years     12,196       12,778  
Common stocks     602       1,007  
Total   $ 226,682     $ 231,986  
Schedule of Realized Gain (Loss) [Table Text Block]

Gross realized gains and losses on sales of available-for-sale investment securities are as follows:

 

    Three months ended  
(Dollars in thousands)   March 31,  
    2013     2012  
Realized gains   $ -     $ 227  
Realized losses     -       -  
Total   $ -     $ 227