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Allowance For Loan Losses (Impaired Loans By Class) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | $ 15,017 | $ 15,252
Recorded Investment | 15,059 | 15,296
Related Allowance | 2,246 | 2,359
Average Recorded Investment | 16,804 | 17,678
Interest Income Recognized | 155 | 743
Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 868 | 985
Recorded Investment | 877 | 994
Related Allowance | 630 | 737
Average Recorded Investment | 963 | 1,062
Interest Income Recognized | 11 | 53
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 5,064 | 5,246
Recorded Investment | 5,074 | 5,259
Related Allowance | 298 | 305
Average Recorded Investment | 5,360 | 6,038
Interest Income Recognized | 67 | 315
Construction And Farmland [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 1,308 | 1,326
Recorded Investment | 1,311 | 1,328
Related Allowance | 139 | 141
Average Recorded Investment | 1,336 | 1,386
Interest Income Recognized | 11 | 27
Residential [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 7,777 | 7,695
Recorded Investment | 7,797 | 7,715
Related Allowance | 1,179 | 1,176
Average Recorded Investment | 9,145 | 9,192
Interest Income Recognized | 66 | 348
All Other Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With No Related Allowance [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 9,208 | 9,717
Recorded Investment | 9,226 | 9,739
Average Recorded Investment | 10,876 | 12,012
Interest Income Recognized | 86 | 506
With No Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 1,475 | 1,632
Recorded Investment | 1,478 | 1,636
Average Recorded Investment | 1,691 | 2,323
Interest Income Recognized | 19 | 130
With No Related Allowance [Member] | Commercial Real Estate Non-Owner Occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 2,274 | 2,290
Recorded Investment | 2,278 | 2,296
Average Recorded Investment | 2,347 | 2,378
Interest Income Recognized | 30 | 147
With No Related Allowance [Member] | Construction And Farmland Residential [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With No Related Allowance [Member] | Construction And Farmland Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 1,085 | 1,102
Recorded Investment | 1,087 | 1,103
Average Recorded Investment | 1,111 | 1,159
Interest Income Recognized | 9 | 18
With No Related Allowance [Member] | Residential Equity Lines [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 463 | 287
Recorded Investment | 463 | 287
Average Recorded Investment | 648 | 469
Interest Income Recognized | 1 | 1
With No Related Allowance [Member] | Residential Single Family [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 3,911 | 4,406
Recorded Investment | 3,920 | 4,417
Average Recorded Investment | 5,079 | 5,683
Interest Income Recognized | 27 | 210
With No Related Allowance [Member] | Residential Multifamily [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With No Related Allowance [Member] | All Other Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With An Allowance Recorded [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 5,809 | 5,535
Recorded Investment | 5,833 | 5,557
Related Allowance | 2,246 | 2,359
Average Recorded Investment | 5,928 | 5,666
Interest Income Recognized | 69 | 237
With An Allowance Recorded [Member] | Commercial - Non Real Estate Commercial And Industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 868 | 985
Recorded Investment | 877 | 994
Related Allowance | 630 | 737
Average Recorded Investment | 963 | 1,062
Interest Income Recognized | 11 | 53
With An Allowance Recorded [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With An Allowance Recorded [Member] | Commercial Real Estate Non-Owner Occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 1,315 | 1,324
Recorded Investment | 1,318 | 1,327
Related Allowance | 298 | 305
Average Recorded Investment | 1,322 | 1,337
Interest Income Recognized | 18 | 38
With An Allowance Recorded [Member] | Construction And Farmland Residential [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With An Allowance Recorded [Member] | Construction And Farmland Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 223 | 224
Recorded Investment | 224 | 225
Related Allowance | 139 | 141
Average Recorded Investment | 225 | 227
Interest Income Recognized | 2 | 9
With An Allowance Recorded [Member] | Residential Equity Lines [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 218 | 358
Recorded Investment | 219 | 359
Related Allowance | 218 | 252
Average Recorded Investment | 216 | 366
Interest Income Recognized | 1 | 12
With An Allowance Recorded [Member] | Residential Single Family [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance | 3,185 | 2,644
Recorded Investment | 3,195 | 2,652
Related Allowance | 961 | 924
Average Recorded Investment | 3,202 | 2,674
Interest Income Recognized | 37 | 125
With An Allowance Recorded [Member] | Residential Multifamily [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |
With An Allowance Recorded [Member] | All Other Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal Balance |  |
Recorded Investment |  |
Related Allowance |  |
Average Recorded Investment |  |
Interest Income Recognized |  |

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