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Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Mar. 31, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 1,111 |  |  | $ 1,111 |  | $ 1,141
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 6,943 |  |  | 6,943 |  | 8,456
Impaired Financing Receivable, Trouble Debt Structuring, Total | 8,054 |  |  | 8,054 |  | 9,597
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 747 |  |  | 747 |  | 994
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 5 | 4 |  | 10 | 6 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 3,212 |  | 3,077 | 8,676 | 4,175 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 2,263 |  | 2,793 | 6,492 | 3,604 |
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 0 | 0 |  | 1 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 0 | 0 |  | 2,386 | 204 |
Commercial and Industrial Loans [Member] |  |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 195 |  |  | 195 |  | 216
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 |  |  | 0 |  | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 195 |  |  | 195 |  | 216
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 |  | 507 |  |  | 507 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 240 |  |  | 240 |
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 | 3,858 |  |  | 3,858 |  | 5,095
Impaired Financing Receivable, Trouble Debt Structuring, Total | 3,858 |  |  | 3,858 |  | 5,095
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 366 |  |  | 366 |  | 147
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 |  | 2 | 1 |
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 493 |  | 2,842 | 493 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 476 |  | 1,753 | 476 |
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 0 |  |  | 1 |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  |  |  | 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 | 916 |  |  | 916 |  | 925
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,404 |  |  | 1,404 |  | 1,172
Impaired Financing Receivable, Trouble Debt Structuring, Total | 2,320 |  |  | 2,320 |  | 2,097
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 151 |  |  | 151 |  | 420
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 3 | 1 |  | 4 | 3 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 2,349 | 848 |  | 3,167 | 1,946 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 1,406 | 848 |  | 2,225 | 1,659 |
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 | 450 |  |  | 450 |  | 1,806
Impaired Financing Receivable, Trouble Debt Structuring, Total | 450 |  |  | 450 |  | 1,806
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 |  |  | 0 |  | 264
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 |  | 2 | 1 |
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 1,229 |  | 1,804 | 1,229 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 1,229 |  | 1,657 | 1,229 |
Commercial Real Estate Loans, Total [Member] |  |  |  |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |  |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 916 |  |  | 916 |  | 925
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,854 |  |  | 1,854 |  | 2,978
Impaired Financing Receivable, Trouble Debt Structuring, Total | 2,770 |  |  | 2,770 |  | 3,903
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 151 |  |  | 151 |  | 684
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 3 | 2 |  | 6 | 4 |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 2,349 | 2,077 |  | 4,971 | 3,175 |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 1,406 | 2,077 |  | 3,882 | 2,888 |
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 | 856 |  |  | 856 |  | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 856 |  |  | 856 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 49 |  |  | 49 |  | 0
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 2 |  |  | 2 |  |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 863 |  |  | 863 |  |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 857 |  |  | 857 |  |
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts |  | 0 |  |  | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  | 0 |  |  | 204 |
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 | 375 |  |  | 375 |  | 383
Impaired Financing Receivable, Trouble Debt Structuring, Total | 375 |  |  | 375 |  | 383
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 181 |  |  | 181 |  | 163
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 | 1,231 |  |  | 1,231 |  | 383
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,231 |  |  | 1,231 |  | 383
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 230 |  |  | 230 |  | 163
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Financing Receivable, Modification, Number of Contracts | 2 |  |  | 2 |  |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 863 |  |  | 863 |  |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 857 |  |  | 857 |  |
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts |  | 0 |  |  | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  | 0 |  |  | 204 |
Consumer Installment and Revolving 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 | 0 |  |  | 0 |  | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 0 |  |  | 0 |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 0 |  |  | $ 0 |  | $ 0

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