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Allowance For Loan Losses (Allowance For Loan Losses By Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | $ 6,577 | $ 8,743 | $ 8,743
Charge-Offs | (42) | (237) | (4,163)
Recoveries | 42 | 81 | 337
Provision | 383 | 300 | 1,660
Ending Balance | 6,960 | 8,887 | 6,577
Ending balance: Individually evaluated for impairment | 2,246 |  | 2,359
Ending balance: collectively evaluated for impairment | 4,714 |  | 4,218
Financing Receivables Ending Balance | 423,850 |  | 418,097
Ending balance individually evaluated for impairment | 15,017 |  | 15,252
Ending balance collectively evaluated for impairment | 408,833 |  | 402,845
Construction And Farmland [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 1,280 | 2,618 | 2,618
Charge-Offs |  |  | (1,313)
Recoveries | 1 |  | 4
Provision | (428) |  | (29)
Ending Balance | 853 |  | 1,280
Ending balance: Individually evaluated for impairment | 139 |  | 141
Ending balance: collectively evaluated for impairment | 714 |  | 1,139
Financing Receivables Ending Balance | 31,451 |  | 37,876
Ending balance individually evaluated for impairment | 1,308 |  | 1,326
Ending balance collectively evaluated for impairment | 30,143 |  | 36,550
Residential Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 2,820 | 3,544 | 3,544
Charge-Offs |  |  | (1,381)
Recoveries | 3 |  | 67
Provision | (26) |  | 590
Ending Balance | 2,797 |  | 2,820
Ending balance: Individually evaluated for impairment | 1,179 |  | 1,176
Ending balance: collectively evaluated for impairment | 1,618 |  | 1,644
Financing Receivables Ending Balance | 218,473 |  | 217,427
Ending balance individually evaluated for impairment | 7,777 |  | 7,695
Ending balance collectively evaluated for impairment | 210,696 |  | 209,732
Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 1,182 | 1,057 | 1,057
Charge-Offs |  |  | (1,118)
Recoveries | 1 |  | 146
Provision | 62 |  | 1,097
Ending Balance | 1,245 |  | 1,182
Ending balance: Individually evaluated for impairment | 298 |  | 305
Ending balance: collectively evaluated for impairment | 947 |  | 877
Financing Receivables Ending Balance | 135,835 |  | 124,382
Ending balance individually evaluated for impairment | 5,064 |  | 5,246
Ending balance collectively evaluated for impairment | 130,771 |  | 119,136
Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 880 | 1,077 | 1,077
Charge-Offs | (14) |  | (207)
Recoveries | 16 |  | 36
Provision | (111) |  | (26)
Ending Balance | 771 |  | 880
Ending balance: Individually evaluated for impairment | 630 |  | 737
Ending balance: collectively evaluated for impairment | 141 |  | 143
Financing Receivables Ending Balance | 21,397 |  | 21,640
Ending balance individually evaluated for impairment | 868 |  | 985
Ending balance collectively evaluated for impairment | 20,529 |  | 20,655
Consumer [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 107 | 131 | 131
Charge-Offs | (23) |  | (116)
Recoveries | 17 |  | 73
Provision | (12) |  | 19
Ending Balance | 89 |  | 107
Ending balance: collectively evaluated for impairment | 89 |  | 107
Financing Receivables Ending Balance | 13,163 |  | 13,307
Ending balance collectively evaluated for impairment | 13,163 |  | 13,307
All Other Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 122 | 123 | 123
Charge-Offs | (5) |  | (28)
Recoveries | 4 |  | 11
Provision | 13 |  | 16
Ending Balance | 134 |  | 122
Ending balance: collectively evaluated for impairment | 134 |  | 122
Financing Receivables Ending Balance | 3,531 |  | 3,465
Ending balance collectively evaluated for impairment | 3,531 |  | 3,465
Unallocated [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Beginning Balance | 186 | 193 | 193
Charge-Offs |  |  |
Recoveries |  |  |
Provision | 885 |  | (7)
Ending Balance | 1,071 |  | 186
Ending balance: Individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 1,071 |  | 186
Financing Receivables Ending Balance |  |  |
Ending balance individually evaluated for impairment |  |  |
Ending balance collectively evaluated for impairment |  |  |

X
- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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