Loans and the Allowance for Loan Losses (Impaired Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
With a specific related allowance recorded:
Recorded investment	$ 4,626	$ 6,922
Unpaid principal balance	5,134	6,596
Related allowance	420	3,026
Commercial real estate - owner occupied [Member]
With no specific related allowance recorded:
Recorded investment	1,066	0
Unpaid principal balance	1,092	0
Related allowance	0	0
With a specific related allowance recorded:
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
Recorded investment	1,066	0
Unpaid principal balance	1,092	0
Related allowance	0	0
Commercial real estate - non-owner occupied [Member]
With no specific related allowance recorded:
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
With a specific related allowance recorded:
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
Residential real estate [Member]
With no specific related allowance recorded:
Recorded investment	0	431
Unpaid principal balance	0	431
Related allowance	0	0
With a specific related allowance recorded:
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
Recorded investment	0	431
Unpaid principal balance	0	431
Related allowance	0	0
Commercial [Member]
With no specific related allowance recorded:
Recorded investment	747	2,748
Unpaid principal balance	1,080	3,771
Related allowance	0	0
With a specific related allowance recorded:
Recorded investment	1,766	2,803
Unpaid principal balance	1,817	1,400
Related allowance	234	2,805
Recorded investment	2,513	5,551
Unpaid principal balance	2,897	5,171
Related allowance	234	2,805
Real estate construction [Member]
With no specific related allowance recorded:
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
With a specific related allowance recorded:
Recorded investment	865	940
Unpaid principal balance	952	994
Related allowance	186	221
Recorded investment	865	940
Unpaid principal balance	952	994
Related allowance	186	221
Consumer [Member]
With no specific related allowance recorded:
Recorded investment	145	0
Unpaid principal balance	155	0
Related allowance	0	0
With a specific related allowance recorded:
Recorded investment	37	0
Unpaid principal balance	38	0
Related allowance	0	0
Recorded investment	182	0
Unpaid principal balance	193	0
Related allowance	$ 0	$ 0

Amount of allowance for credit losses related to recorded investment with no specific related allowance.

No definition available.

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- Definition

Amount of allowance for credit losses related to recorded investment with specific related allowance.

+ References

No definition available.

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With No Specific Related Allowance Recorded [Abstract]

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- Definition

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=84173941&loc=SL6953550-111524

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- Definition

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=84173941&loc=d3e5212-111524

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+ 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=84173941&loc=d3e5212-111524

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

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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=84173941&loc=d3e5212-111524

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- Definition

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

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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=84173941&loc=d3e5212-111524

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