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Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | $ 15,571 |  | $ 15,571 |  | $ 5,190
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (3,765) |  | (3,765) |  | (1,633)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 11,806 |  | 11,806 |  | 3,557
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 2,357 |  | 2,357 |  | 8,476
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | (177) |  | (177) |  | (1,047)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,180 |  | 2,180 |  | 7,429
Impaired Financing Receivable, With Related Allowance, Related Allowance | 312 |  | 312 |  | 1,221
Impaired Financing Receivable, Unpaid Principal Balance | 17,928 |  | 17,928 |  | 13,666
Impaired Financing Receivable, Charge-off And Payments Applied | (3,942) |  | (3,942) |  | (2,680)
Impaired Financing Receivable, Recorded Investment | 13,986 |  | 13,986 |  | 10,986
Impaired Financing Receivable, Related Allowance | 312 |  | 312 |  | 1,221
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 10,370 | 8,864 | 10,327 | 10,091 |
Impaired Financing Receivable, Interest Income, Accrual Method | 17 | 13 | 60 | 22 |
Commercial and Industrial Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 184 |  | 184 |  | 216
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 184 |  | 184 |  | 216
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0 |  |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  | 0
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 189 | 229 | 200 | 345 |
Impaired Financing Receivable, Interest Income, Accrual Method | 3 | 3 | 11 | 5 |
Construction And Land Development Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 5,187 |  | 5,187 |  | 3,958
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (1,869) |  | (1,869) |  | (1,572)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 3,318 |  | 3,318 |  | 2,386
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 477 |  | 477 |  | 2,882
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | (39) |  | (39) |  | (173)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 438 |  | 438 |  | 2,709
Impaired Financing Receivable, Related Allowance | 141 |  | 141 |  | 147
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 3,801 | 3,589 | 4,357 | 3,843 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | 0 | 0 | 0 |
Commercial Real Estate Owner Occupied Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 790 |  | 790 |  | 361
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (46) |  | (46) |  | (11)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 744 |  | 744 |  | 350
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 904 |  | 904 |  | 2,255
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | (29)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 904 |  | 904 |  | 2,226
Impaired Financing Receivable, Related Allowance | 139 |  | 139 |  | 544
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 2,468 | 1,886 | 2,537 | 1,769 |
Impaired Financing Receivable, Interest Income, Accrual Method | 14 | 10 | 49 | 17 |
Commercial Real Estate Other Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 7,922 |  | 7,922 |  | 655
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (1,546) |  | (1,546) |  | (50)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 6,376 |  | 6,376 |  | 605
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0 |  | 1,242
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | (41)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0 |  | 1,201
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  | 264
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 2,211 | 2,096 | 1,713 | 2,545 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | 0 | 0 | 0 |
Commercial Real Estate Loans, Total [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 8,712 |  | 8,712 |  | 1,016
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (1,592) |  | (1,592) |  | (61)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 7,120 |  | 7,120 |  | 955
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 904 |  | 904 |  | 3,497
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | (70)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 904 |  | 904 |  | 3,427
Impaired Financing Receivable, Related Allowance | 139 |  | 139 |  | 808
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 4,679 | 3,982 | 4,250 | 4,314 |
Impaired Financing Receivable, Interest Income, Accrual Method | 14 | 10 | 49 | 17 |
Residential Real Estate Consumer Mortgage Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 976 |  | 976 |  | 1,707
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | (138) |  | (138) |  | (797)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 838 |  | 838 |  | 910
Impaired Financing Receivable, Related Allowance | 32 |  | 32 |  | 103
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 846 | 934 | 870 | 1,514 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | 0 | 0 | 0 |
Residential Real Estate Investment Property Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 1,488 |  | 1,488 |  | 0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (304) |  | (304) |  | 0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,184 |  | 1,184 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0 |  | 390
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | (7)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0 |  | 383
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  | 163
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 855 | 130 | 650 | 75 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | 0 | 0 | 0 |
Residential Real Estate Loans, Total [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 1,488 |  | 1,488 |  | 0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (304) |  | (304) |  | 0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,184 |  | 1,184 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 976 |  | 976 |  | 2,097
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | (138) |  | (138) |  | (804)
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 838 |  | 838 |  | 1,293
Impaired Financing Receivable, Related Allowance | 32 |  | 32 |  | 266
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 1,701 | 1,064 | 1,520 | 1,589 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | 0 | 0 | 0 |
Consumer Installment and Revolving Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 |  | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  | 0
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Impaired Financing Receivable, Average Recorded Investment | 0 | 0 | 0 | 0 |
Impaired Financing Receivable, Interest Income, Accrual Method | $ 0 | $ 0 | $ 0 | $ 0 |

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