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Allowance for Loan Losses Allowance for Loan Losses (Change in Accounting Methodology) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	$ (188)	$ (227)	$ 350
Construction And Farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	(469)	(85)	375
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	81	355	497
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	246	(147)	(288)
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	13	(434)	(255)
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	(59)	39	0
All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses	$ 6	20	$ (20)
Total Excluding Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		(252)
Calculated Provision Based On Prior Methodology [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		(635)
Calculated Provision Based On Prior Methodology [Member] | Construction And Farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		(118)
Calculated Provision Based On Prior Methodology [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		173
Calculated Provision Based On Prior Methodology [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		(280)
Calculated Provision Based On Prior Methodology [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		(457)
Calculated Provision Based On Prior Methodology [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		28
Calculated Provision Based On Prior Methodology [Member] | All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		19
Difference [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		383
Difference [Member] | Construction And Farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		33
Difference [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		182
Difference [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		133
Difference [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		23
Difference [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		11
Difference [Member] | All Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
(Recovery Of) Provision For Loan Losses		$ 1

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: 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

Reference 2: 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=56944662&loc=d3e3602-108585

Reference 3: 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=49124121&loc=SL6953423-111524

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