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Business Segments (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Segment Reporting Information [Line Items]          
Net interest income $ 3,836 $ 3,806 $ 7,702 $ 7,513  
Provision for loan losses 425 906 1,175 1,485 4,807
Net interest income after provision for loan losses 3,411 2,900 6,527 6,028  
Noninterest income 843 758 1,514 1,430  
Noninterest expense 3,559 3,204 6,843 6,374  
Income before income taxes 695 454 1,198 1,084  
Income tax expense 209 135 352 330  
Net income 486 319 846 754  
Total assets 433,204 429,625 433,204 429,625 427,436
Number of reportable segments     2    
Community Banking [Member]
          
Segment Reporting Information [Line Items]          
Net interest income 3,836 3,806 7,702 7,513  
Provision for loan losses 425 906 1,175 1,485  
Net interest income after provision for loan losses 3,411 2,900 6,527 6,028  
Noninterest income 554 515 999 901  
Noninterest expense 3,318 2,990 6,407 5,915  
Income before income taxes 647 425 1,119 1,014  
Income tax expense 193 125 325 306  
Net income 454 300 794 708  
Total assets 431,967 429,122 431,967 429,122  
Mortgage [Member]
          
Segment Reporting Information [Line Items]          
Net interest income           
Provision for loan losses           
Net interest income after provision for loan losses           
Noninterest income 289 243 515 529  
Noninterest expense 241 214 436 459  
Income before income taxes 48 29 79 70  
Income tax expense 16 10 27 24  
Net income 32 19 52 46  
Total assets $ 1,237 $ 503 $ 1,237 $ 503