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Business Segments (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
segment
Jun. 30, 2012
Dec. 31, 2012
Segment Reporting Information [Line Items]          
Net interest income $ 3,957,000 $ 3,836,000 $ 7,878,000 $ 7,702,000  
Provision for loan losses 55,000 425,000 290,000 1,175,000 2,289,000
Net interest income after provision for loan losses 3,902,000 3,411,000 7,588,000 6,527,000  
Noninterest income 905,000 843,000 1,869,000 1,514,000  
Noninterest expense 3,671,000 3,559,000 7,202,000 6,843,000  
Income before income taxes 1,136,000 695,000 2,255,000 1,198,000  
Income tax expense 339,000 209,000 670,000 352,000  
Net income 797,000 486,000 1,585,000 846,000  
Total assets 430,871,000 433,204,000 430,871,000 433,204,000 441,381,000
Number of reportable segments     2    
Community Banking [Member]
          
Segment Reporting Information [Line Items]          
Net interest income 3,957,000 3,836,000 7,878,000 7,702,000  
Provision for loan losses 55,000 425,000 290,000 1,175,000  
Net interest income after provision for loan losses 3,902,000 3,411,000 7,588,000 6,527,000  
Noninterest income 565,000 554,000 1,210,000 999,000  
Noninterest expense 3,405,000 3,318,000 6,683,000 6,407,000  
Income before income taxes 1,062,000 647,000 2,115,000 1,119,000  
Income tax expense 314,000 193,000 623,000 325,000  
Net income 748,000 454,000 1,492,000 794,000  
Total assets 429,937,000 431,967,000 429,937,000 431,967,000  
Mortgage [Member]
          
Segment Reporting Information [Line Items]          
Noninterest income 340,000 289,000 659,000 515,000  
Noninterest expense 266,000 241,000 519,000 436,000  
Income before income taxes 74,000 48,000 140,000 79,000  
Income tax expense 25,000 16,000 47,000 27,000  
Net income 49,000 32,000 93,000 52,000  
Total assets $ 934,000 $ 1,237,000 $ 934,000 $ 1,237,000