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Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 1,033 |  | $ 1,033 |  | $ 1,068
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 3,337 |  | 3,337 |  | 4,107
Impaired Financing Receivable, Trouble Debt Structuring, Total | 4,370 |  | 4,370 |  | 5,175
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 227 |  | 227 |  | 263
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 0 | 5 | 2 | 10 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 0 | 3,212 | 562 | 8,676 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 0 | 2,263 | 562 | 6,492 |
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 and Industrial Loans [Member] |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 148 |  | 148 |  | 169
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 |  | 0 |  | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 148 |  | 148 |  | 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 | 1,601 |  | 1,601 |  | 1,623
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,601 |  | 1,601 |  | 1,623
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 107 |  | 107 |  | 129
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts |  | 0 |  | 2 |
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 0 |  | 2,842 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 0 |  | 1,753 |
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 | 885 |  | 885 |  | 899
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 299 |  | 299 |  | 1,045
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,184 |  | 1,184 |  | 1,944
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 120 |  | 120 |  | 134
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts |  | 3 |  | 4 |
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 2,349 |  | 3,167 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 1,406 |  | 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 | 0 |  | 0 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 429 |  | 429 |  | 432
Impaired Financing Receivable, Trouble Debt Structuring, Total | 429 |  | 429 |  | 432
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  | 0 |  | 0
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 0 | 0 | 1 | 2 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 0 | 0 | 431 | 1,804 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 0 | 0 | 431 | 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 | 885 |  | 885 |  | 899
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 728 |  | 728 |  | 1,477
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,613 |  | 1,613 |  | 2,376
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 120 |  | 120 |  | 134
Financing Receivable, Modifications [Line Items] |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 0 | 3 | 1 | 6 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 0 | 2,349 | 431 | 4,971 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 0 | 1,406 | 431 | 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 | 783 |  | 783 |  | 819
Impaired Financing Receivable, Trouble Debt Structuring, Total | 783 |  | 783 |  | 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 | 0 | 2 | 1 | 2 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 0 | 863 | 131 | 863 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 0 | 857 | 131 | 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 | 225 |  | 225 |  | 188
Impaired Financing Receivable, Trouble Debt Structuring, Total | 225 |  | 225 |  | 188
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  | 0 |  | 0
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 | 1,008 |  | 1,008 |  | 1,007
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,008 |  | 1,008 |  | 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 | 0 | 2 | 1 | 2 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 0 | 863 | 131 | 863 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | $ 0 | $ 857 | $ 131 | $ 857 |

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