Loans (Impaired Loans By Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	$ 7,165	$ 383
Impaired Loans with Allowance: Unpaid Principal Balance	7,204	422
Impaired Loans with Allowance: Related Allowance	2,257	36
Impaired Loans with No Allowance: Recorded Investment	13,747	10,759
Impaired Loans with No Allowance: Unpaid Principal Balance	15,904	12,917
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	146	146
Impaired Loans with Allowance: Unpaid Principal Balance	146	146
Impaired Loans with Allowance: Related Allowance	29	29
Impaired Loans with No Allowance: Recorded Investment	196	195
Impaired Loans with No Allowance: Unpaid Principal Balance	1,310	1,310
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	237	237
Impaired Loans with Allowance: Unpaid Principal Balance	276	276
Impaired Loans with Allowance: Related Allowance	7	7
Impaired Loans with No Allowance: Recorded Investment	11,765	8,772
Impaired Loans with No Allowance: Unpaid Principal Balance	12,209	9,216
Commercial real estate construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	5,384
Impaired Loans with Allowance: Unpaid Principal Balance	5,384
Impaired Loans with Allowance: Related Allowance	1,806
Impaired Loans with No Allowance: Recorded Investment	854	854
Impaired Loans with No Allowance: Unpaid Principal Balance	1,128	1,128
Residential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	1,398
Impaired Loans with Allowance: Unpaid Principal Balance	1,398
Impaired Loans with Allowance: Related Allowance	415
Impaired Loans with No Allowance: Recorded Investment	932	938
Impaired Loans with No Allowance: Unpaid Principal Balance	$ 1,257	$ 1,263

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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)

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

+ Details

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- Definition

Amount of investment in impaired financing receivables for which there is no 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

+ Details

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- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no 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

+ Details

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- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

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- Definition

Unpaid principal balance of impaired financing receivables for which there is 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 (a)(4)

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

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