Loans (Details 4) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 |
Impaired Loans, Recorded Investment | $10,383 | $11,017 | $10,383 | $11,017 | $14,784 |
Impaired Loans, Unpaid Principal Balance | 15,086 | 14,126 | 15,086 | 14,126 | 17,915 |
Impaired Loans, Related Allowance | 0 | 1,781 | 0 | 1,781 | 0 |
Impaired Loans, Average Recorded Investment | 11,623 | 10,231 | 13,251 | 11,671 | 12,331 |
Impaired Loans, Interest Income Recognized | 39 | 63 | 142 | 158 | 226 |
Residential Real Estate [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 871 | 768 | 871 | 768 | 868 |
Impaired Loans, Unpaid Principal Balance | 1,102 | 983 | 1,102 | 983 | 1,100 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 1,333 | 734 | 1,200 | 849 | 853 |
Impaired Loans, Interest Income Recognized | 9 | 4 | 19 | 13 | 17 |
Residential Real Estate [Member] | Impaired Loan Receivable With Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 100 | 0 | 50 | 121 | 97 |
Impaired Loans, Interest Income Recognized | 0 | 0 | 1 | 0 | 0 |
Residential Real Estate [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 871 | 768 | 871 | 768 | 868 |
Impaired Loans, Unpaid Principal Balance | 1,102 | 983 | 1,102 | 983 | 1,100 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 1,233 | 734 | 1,150 | 728 | 756 |
Impaired Loans, Interest Income Recognized | 9 | 4 | 19 | 13 | 17 |
Commercial Real Estate Owner Occupied [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 1,787 | 2,086 | 1,787 | 2,086 | 3,134 |
Impaired Loans, Unpaid Principal Balance | 1,787 | 2,086 | 1,787 | 2,086 | 3,166 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 2,327 | 1,110 | 2,674 | 791 | 1,259 |
Impaired Loans, Interest Income Recognized | 0 | 0 | 24 | 2 | 2 |
Commercial Real Estate Owner Occupied [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 1,787 | 2,086 | 1,787 | 2,086 | 3,134 |
Impaired Loans, Unpaid Principal Balance | 1,787 | 2,086 | 1,787 | 2,086 | 3,166 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 2,327 | 1,110 | 2,674 | 791 | 1,259 |
Impaired Loans, Interest Income Recognized | 0 | 0 | 24 | 2 | 2 |
Commercial Real Estate Non Owner Occupied [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 4,591 | 5,811 | 4,591 | 5,811 | 5,795 |
Impaired Loans, Unpaid Principal Balance | 6,791 | 6,416 | 6,791 | 6,416 | 6,401 |
Impaired Loans, Related Allowance | 0 | 1,781 | 0 | 1,781 | 0 |
Impaired Loans, Average Recorded Investment | 4,584 | 5,850 | 5,349 | 6,197 | 6,117 |
Impaired Loans, Interest Income Recognized | 9 | 32 | 32 | 54 | 84 |
Commercial Real Estate Non Owner Occupied [Member] | Impaired Loan Receivable With Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | ' | 3,485 | ' | 3,485 | 0 |
Impaired Loans, Unpaid Principal Balance | ' | 3,997 | ' | 3,997 | 0 |
Impaired Loans, Related Allowance | ' | 1,781 | ' | 1,781 | 0 |
Impaired Loans, Average Recorded Investment | ' | 3,485 | ' | 3,556 | 2,845 |
Impaired Loans, Interest Income Recognized | ' | 0 | ' | 0 | 0 |
Commercial Real Estate Non Owner Occupied [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 4,591 | 2,326 | 4,591 | 2,326 | 5,795 |
Impaired Loans, Unpaid Principal Balance | 6,791 | 2,419 | 6,791 | 2,419 | 6,401 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 4,584 | 2,365 | 5,349 | 2,641 | 3,272 |
Impaired Loans, Interest Income Recognized | 9 | 32 | 32 | 54 | 84 |
Construction and Development [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 1,413 | 1,576 | 1,413 | 1,576 | 1,792 |
Impaired Loans, Unpaid Principal Balance | 3,685 | 3,855 | 3,685 | 3,855 | 4,053 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 1,435 | 1,732 | 1,626 | 3,125 | 2,896 |
Impaired Loans, Interest Income Recognized | 20 | 18 | 60 | 65 | 93 |
Construction and Development [Member] | Impaired Loan Receivable With Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | ' | 0 | ' | 0 | 0 |
Impaired Loans, Unpaid Principal Balance | ' | 0 | ' | 0 | 0 |
Impaired Loans, Related Allowance | ' | 0 | ' | 0 | 0 |
Impaired Loans, Average Recorded Investment | ' | 92 | ' | 189 | 189 |
Impaired Loans, Interest Income Recognized | ' | 0 | ' | 12 | 12 |
Construction and Development [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 1,413 | 1,576 | 1,413 | 1,576 | 1,792 |
Impaired Loans, Unpaid Principal Balance | 3,685 | 3,855 | 3,685 | 3,855 | 4,053 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 1,435 | 1,640 | 1,626 | 2,936 | 2,707 |
Impaired Loans, Interest Income Recognized | 20 | 18 | 60 | 53 | 81 |
Commercial Loan [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 766 | 776 | 766 | 776 | 2,219 |
Impaired Loans, Unpaid Principal Balance | 766 | 786 | 766 | 786 | 2,219 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 984 | 692 | 1,440 | 653 | 966 |
Impaired Loans, Interest Income Recognized | 1 | 9 | 6 | 24 | 30 |
Commercial Loan [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 766 | 776 | 766 | 776 | 2,219 |
Impaired Loans, Unpaid Principal Balance | 766 | 786 | 766 | 786 | 2,219 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 984 | 692 | 1,440 | 653 | 966 |
Impaired Loans, Interest Income Recognized | 1 | 9 | 6 | 24 | 30 |
Consumer Loan [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Related Allowance | 0 | 0 | 0 | 0 | 0 |
Impaired Loans, Average Recorded Investment | 5 | 113 | 2 | 56 | 45 |
Impaired Loans, Interest Income Recognized | 0 | 0 | 1 | 0 | 0 |
Consumer Loan [Member] | Impaired Loan Receivable With Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 0 | ' | 0 | ' | ' |
Impaired Loans, Unpaid Principal Balance | 0 | ' | 0 | ' | ' |
Impaired Loans, Related Allowance | 0 | ' | 0 | ' | ' |
Impaired Loans, Average Recorded Investment | 5 | ' | 2 | ' | ' |
Impaired Loans, Interest Income Recognized | 0 | ' | 0 | ' | ' |
Consumer Loan [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | ' | 0 | ' | 0 | 0 |
Impaired Loans, Unpaid Principal Balance | ' | 0 | ' | 0 | 0 |
Impaired Loans, Related Allowance | ' | 0 | ' | 0 | 0 |
Impaired Loans, Average Recorded Investment | ' | 113 | ' | 56 | 45 |
Impaired Loans, Interest Income Recognized | ' | 0 | ' | 0 | 0 |
Farm Land [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 955 | ' | 955 | ' | 976 |
Impaired Loans, Unpaid Principal Balance | 955 | ' | 955 | ' | 976 |
Impaired Loans, Related Allowance | 0 | ' | 0 | ' | 0 |
Impaired Loans, Average Recorded Investment | 955 | ' | 960 | ' | 195 |
Impaired Loans, Interest Income Recognized | 0 | ' | 0 | ' | 0 |
Farm Land [Member] | Impaired Loan Receivable With No Related Allowance [Member] | ' | ' | ' | ' | ' |
Impaired Loans, Recorded Investment | 955 | ' | 955 | ' | 976 |
Impaired Loans, Unpaid Principal Balance | 955 | ' | 955 | ' | 976 |
Impaired Loans, Related Allowance | 0 | ' | 0 | ' | 0 |
Impaired Loans, Average Recorded Investment | 955 | ' | 960 | ' | 195 |
Impaired Loans, Interest Income Recognized | $0 | ' | $0 | ' | $0 |