Loans and Related Allowance for Loan Losses (Average of Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Impaired [Line Items]
Average Investment	$ 23,828	$ 32,519
Interest income recognized on an accrual basis	171	206
Interest income recognized on a cash basis	1	13
Commercial real estate- non owner-occupied [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	4,022	1,189
Interest income recognized on an accrual basis	40	7
Interest income recognized on a cash basis	0	0
Commercial real estate- all other CRE [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	7,316	10,489
Interest income recognized on an accrual basis	27	41
Interest income recognized on a cash basis	1	1
Acquisition and development- 1-4 family residential construction [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	790	2,365
Interest income recognized on an accrual basis	9	14
Interest income recognized on a cash basis	0	0
Acquisition and development- All other A&D [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	5,530	8,677
Interest income recognized on an accrual basis	32	61
Interest income recognized on a cash basis	0	0
Commercial and industrial [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	1,689	2,226
Interest income recognized on an accrual basis	23	26
Interest income recognized on a cash basis	0	2
Residential mortgage- term [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	4,091	6,879
Interest income recognized on an accrual basis	40	54
Interest income recognized on a cash basis	0	9
Residential mortgage- home equity [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	377	683
Interest income recognized on an accrual basis	0	3
Interest income recognized on a cash basis	0	1
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Investment	13	11
Interest income recognized on an accrual basis	0	0
Interest income recognized on a cash basis	$ 0	$ 0

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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=35738203&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524

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- Definition

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

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- Definition

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+ References

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