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Business Segments (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
segment
Sep. 30, 2011
Dec. 31, 2011
Segment Reporting Information [Line Items]          
Net interest income $ 4,027,000 $ 3,846,000 $ 11,729,000 $ 11,359,000  
Provision for loan losses 601,000 1,272,000 1,776,000 2,757,000 4,807,000
Net interest income after provision for loan losses 3,426,000 2,574,000 9,953,000 8,602,000  
Noninterest income 1,052,000 1,200,000 2,566,000 2,630,000  
Noninterest expense 3,783,000 3,706,000 10,626,000 10,080,000  
Income before income taxes 695,000 68,000 1,893,000 1,152,000  
Income tax expense 156,000 4,000 508,000 334,000  
Net income 539,000 64,000 1,385,000 818,000  
Total assets 426,077,000 429,440,000 426,077,000 429,440,000 427,436,000
Number of reportable segments     2    
Community Banking [Member]
          
Segment Reporting Information [Line Items]          
Net interest income 4,027,000 3,846,000 11,729,000 11,359,000  
Provision for loan losses 601,000 1,272,000 1,776,000 2,757,000  
Net interest income after provision for loan losses 3,426,000 2,574,000 9,953,000 8,602,000  
Noninterest income 650,000 950,000 1,649,000 1,851,000  
Noninterest expense 3,491,000 3,500,000 9,898,000 9,415,000  
Income before income taxes 585,000 24,000 1,704,000 1,038,000  
Income tax expense 119,000 (11,000) 444,000 295,000  
Net income 466,000 35,000 1,260,000 743,000  
Total assets 421,830,000 428,924,000 421,830,000 428,924,000  
Mortgage [Member]
          
Segment Reporting Information [Line Items]          
Noninterest income 402,000 250,000 917,000 779,000  
Noninterest expense 292,000 206,000 728,000 665,000  
Income before income taxes 110,000 44,000 189,000 114,000  
Income tax expense 37,000 15,000 64,000 39,000  
Net income 73,000 29,000 125,000 75,000  
Total assets $ 4,247,000 $ 516,000 $ 4,247,000 $ 516,000