Loans - Impaired loans (Details 4) (Loans Receivable, USD $) | 9 Months Ended |
In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013 |
Commercial, financial and agricultural | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Impaired Financing Receivable, With no specific allocation recorded, Recorded Investment | $0 | $0 |
Impaired Financing Receivable, With no specific allocation recorded, Unpaid Principal Balance | 0 | 0 |
Impaired Financing Receivable, With no specific allocation recorded, Average Recorded Investment | 0 | 35 |
Impaired Financing Receivable, With no specific allocation recorded, Interest Income Recognized | 0 | 0 |
Impaired Financing Receivable, With allocation recorded, Recorded Investment | 0 | 534 |
Impaired Financing Receivable, With allocation recorded, Unpaid Principal Balance | 0 | 534 |
Impaired Financing Receivable, With allocation recorded, Specific Allowance | 0 | 71 |
Impaired Financing Receivable, With allocation recorded, Average Recorded Investment | 375 | 845 |
Impaired Financing Receivable, With allocation recorded, Interest Income Recognized | 0 | 0 |
Impaired Financing Receivable, Recorded Investment | 0 | 534 |
Impaired Financing Receivable, Unpaid Principal Balance | 0 | 534 |
Impaired Financing Receivable, Specific Allowance | 0 | 71 |
Impaired Financing Receivable, Average Recorded Investment | 375 | 880 |
Impaired Financing Receivable, Interest Income Recognized | 0 | 0 |
Real estate - construction | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Impaired Financing Receivable, With no specific allocation recorded, Recorded Investment | 201 | 442 |
Impaired Financing Receivable, With no specific allocation recorded, Unpaid Principal Balance | 201 | 442 |
Impaired Financing Receivable, With no specific allocation recorded, Average Recorded Investment | 264 | 633 |
Impaired Financing Receivable, With no specific allocation recorded, Interest Income Recognized | 0 | 6 |
Impaired Financing Receivable, With allocation recorded, Recorded Investment | 156 | 101 |
Impaired Financing Receivable, With allocation recorded, Unpaid Principal Balance | 156 | 101 |
Impaired Financing Receivable, With allocation recorded, Specific Allowance | 79 | 10 |
Impaired Financing Receivable, With allocation recorded, Average Recorded Investment | 100 | 172 |
Impaired Financing Receivable, With allocation recorded, Interest Income Recognized | 4 | 0 |
Impaired Financing Receivable, Recorded Investment | 357 | 543 |
Impaired Financing Receivable, Unpaid Principal Balance | 357 | 543 |
Impaired Financing Receivable, Specific Allowance | 79 | 10 |
Impaired Financing Receivable, Average Recorded Investment | 364 | 805 |
Impaired Financing Receivable, Interest Income Recognized | 4 | 6 |
Real estate - mortgage | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Impaired Financing Receivable, With no specific allocation recorded, Recorded Investment | 1,305 | 1,611 |
Impaired Financing Receivable, With no specific allocation recorded, Unpaid Principal Balance | 1,409 | 1,611 |
Impaired Financing Receivable, With no specific allocation recorded, Average Recorded Investment | 1,420 | 2,504 |
Impaired Financing Receivable, With no specific allocation recorded, Interest Income Recognized | 31 | 20 |
Impaired Financing Receivable, With allocation recorded, Recorded Investment | 2,521 | 5,028 |
Impaired Financing Receivable, With allocation recorded, Unpaid Principal Balance | 2,621 | 5,028 |
Impaired Financing Receivable, With allocation recorded, Specific Allowance | 403 | 1,023 |
Impaired Financing Receivable, With allocation recorded, Average Recorded Investment | 3,672 | 5,503 |
Impaired Financing Receivable, With allocation recorded, Interest Income Recognized | 5 | 4 |
Impaired Financing Receivable, Recorded Investment | 3,826 | 6,639 |
Impaired Financing Receivable, Unpaid Principal Balance | 4,030 | 6,639 |
Impaired Financing Receivable, Specific Allowance | 403 | 1,023 |
Impaired Financing Receivable, Average Recorded Investment | 5,092 | 8,007 |
Impaired Financing Receivable, Interest Income Recognized | 36 | 24 |
Installment loans to individuals | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Impaired Financing Receivable, With no specific allocation recorded, Recorded Investment | 5 | 4 |
Impaired Financing Receivable, With no specific allocation recorded, Unpaid Principal Balance | 5 | 4 |
Impaired Financing Receivable, With no specific allocation recorded, Average Recorded Investment | 7 | 6 |
Impaired Financing Receivable, With no specific allocation recorded, Interest Income Recognized | 0 | 0 |
Impaired Financing Receivable, With allocation recorded, Recorded Investment | 0 | 18 |
Impaired Financing Receivable, With allocation recorded, Unpaid Principal Balance | 0 | 18 |
Impaired Financing Receivable, With allocation recorded, Specific Allowance | 0 | 6 |
Impaired Financing Receivable, With allocation recorded, Average Recorded Investment | 0 | 8 |
Impaired Financing Receivable, With allocation recorded, Interest Income Recognized | 0 | 0 |
Impaired Financing Receivable, Recorded Investment | 5 | 22 |
Impaired Financing Receivable, Unpaid Principal Balance | 5 | 22 |
Impaired Financing Receivable, Specific Allowance | 0 | 6 |
Impaired Financing Receivable, Average Recorded Investment | 7 | 14 |
Impaired Financing Receivable, Interest Income Recognized | 0 | 0 |
All other loans | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Impaired Financing Receivable, With no specific allocation recorded, Recorded Investment | 0 | 0 |
Impaired Financing Receivable, With no specific allocation recorded, Unpaid Principal Balance | 0 | 0 |
Impaired Financing Receivable, With no specific allocation recorded, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, With no specific allocation recorded, Interest Income Recognized | 0 | 0 |
Impaired Financing Receivable, With allocation recorded, Recorded Investment | 0 | 0 |
Impaired Financing Receivable, With allocation recorded, Unpaid Principal Balance | 0 | 0 |
Impaired Financing Receivable, With allocation recorded, Specific Allowance | 0 | 3 |
Impaired Financing Receivable, With allocation recorded, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, With allocation recorded, Interest Income Recognized | 0 | 0 |
Impaired Financing Receivable, Recorded Investment | 0 | 0 |
Impaired Financing Receivable, Unpaid Principal Balance | 0 | 0 |
Impaired Financing Receivable, Specific Allowance | 0 | 3 |
Impaired Financing Receivable, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, Interest Income Recognized | $0 | $0 |