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Loans, Allowance For Loan Losses And OREO (Narrative) (Details) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($) contract item	Jun. 30, 2017 contract	Dec. 31, 2017 USD ($) contract item	Dec. 31, 2016 USD ($)
Financing Receivable, Modifications [Line Items]
Other real estate owned | $	$ 2,585		$ 2,650	$ 2,370
Loan modifications that would have been classified as TDRs | contract	0	0
Loan modifications classified as TDRs | contract	0	0
Outstanding commitments to disburse additional funds on TDR's | contract	0		0
Consumer mortgage loan secured by residential real estate | $	$ 0
Number of real estate properties held | item	0		3
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Other real estate owned | $	$ 545		$ 520

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Outstanding commitments to disburse additional funds on TDR's

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

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-Name Accounting Standards Codification
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-SubTopic 10
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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04(c)(Schedule III))
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