Loans and Allowance for Loan Losses (Details Textual) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Loans and Allowance for Loan Losses (Textual) [Abstract]      
Non-accruing loans, current $ 207 $ 149  
Interest income recognized on non-accruing loans 148 30  
Interest income recognized on impaired loans 145 30  
Increase in the provision for loan losses 291    
Allocated allowance for loan losses on troubled debt restructurings 232   5
Loans originated for sale 35,691 21,089  
Proceeds on sales of loan 31,516 22,697  
Gains on sales of loans 879 529  
Loans serviced for others $ 3,229 $ 2,578 $ 3,257
Maximum [Member]
     
Financing Receivable, Allowance for Credit Losses [Line Items]      
Modification under restructuring of debt involving reduction of interest of loan term range 5 years    
Modification under restructuring of debt involving extension of maturity date of loan term range 5 years    
Minimum [Member]
     
Financing Receivable, Allowance for Credit Losses [Line Items]      
Modification under restructuring of debt involving reduction of interest of loan term range 9 months    
Modification under restructuring of debt involving extension of maturity date of loan term range 3 months