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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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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Section 50

-Paragraph 17

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(3)

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

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