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Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 1,626 |  | $ 1,626 |  | $ 1,068
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 3,300 |  | 3,300 |  | 4,107
Impaired Financing Receivable, Trouble Debt Structuring, Total | 4,926 |  | 4,926 |  | 5,175
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 284 |  | 284 |  | 263
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 3 | 2 | 4 | 12 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 2,166 | 2,513 | 2,727 | 11,190 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 2,166 | 2,492 | 2,727 | 8,985 |
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 2 | 1 | 2 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 1,623 | 2,386 | 1,623 | 2,386 |
Commercial and Industrial Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 136 |  | 136 |  | 169
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 |  | 0 |  | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 136 |  | 136 |  | 169
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  | 0 |  | 0
Construction And Land Development Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 |  | 0 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,593 |  | 1,593 |  | 1,623
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,593 |  | 1,593 |  | 1,623
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 99 |  | 99 |  | 129
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 |  | 3 |
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 2,138 |  | 4,981 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 2,119 |  | 3,873 |
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 1 | 1 | 1 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 1,197 | 2,386 | 1,197 | 2,386 |
Commercial Real Estate Owner Occupied Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 882 |  | 882 |  | 899
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 292 |  | 292 |  | 1,045
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,174 |  | 1,174 |  | 1,944
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 117 |  | 117 |  | 134
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 1 | 0 | 1 | 4 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 882 | 0 | 882 | 3,167 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 882 | 0 | 882 | 2,225 |
Commercial Real Estate Other Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 608 |  | 608 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 426 |  | 426 |  | 432
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,034 |  | 1,034 |  | 432
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 68 |  | 68 |  | 0
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 1 | 0 | 1 | 2 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 606 | 0 | 1,037 | 1,804 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 610 | 0 | 1,041 | 1,657 |
Commercial Real Estate Loans, Total [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 1,490 |  | 1,490 |  | 899
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 718 |  | 718 |  | 1,477
Impaired Financing Receivable, Trouble Debt Structuring, Total | 2,208 |  | 2,208 |  | 2,376
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 185 |  | 185 |  | 134
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 2 | 0 | 2 | 6 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 1,488 | 0 | 1,919 | 4,971 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 1,492 | 0 | 1,923 | 3,882 |
Residential Real Estate Consumer Mortgage Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 |  | 0 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 772 |  | 772 |  | 819
Impaired Financing Receivable, Trouble Debt Structuring, Total | 772 |  | 772 |  | 819
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  | 0 |  | 0
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 1 | 0 | 2 | 2 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 678 | 0 | 808 | 863 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 674 | 0 | 804 | 857 |
Residential Real Estate Investment Property Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 |  | 0 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 217 |  | 217 |  | 188
Impaired Financing Receivable, Trouble Debt Structuring, Total | 217 |  | 217 |  | 188
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  | 0 |  | 0
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 |  | 1 |
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 375 |  | 375 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 373 |  | 373 |
Residential Real Estate Loans, Total [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 |  | 0 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 989 |  | 989 |  | 1,007
Impaired Financing Receivable, Trouble Debt Structuring, Total | 989 |  | 989 |  | 1,007
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  | 0 |  | 0
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 1 | 1 | 2 | 3 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 678 | 375 | 808 | 1,238 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | $ 674 | $ 373 | $ 804 | $ 1,230 |

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