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Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	$ 9,521	$ 10,391	$ 10,214	$ 9,932
Charge-Offs	(152)	(379)	(1,095)	(643)
Recoveries	70	134	220	307
Provision (Credit)	0	200	100	750
Balance at End of Period	9,439	10,346	9,439	10,346
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	3,566	3,824	4,298	4,041
Charge-Offs	0	(228)	(574)	(228)
Recoveries	17	9	29	22
Provision (Credit)	175	562	5	332
Balance at End of Period	3,758	4,167	3,758	4,167
Commercial loans secured by non-owner occupied real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	3,686	4,488	3,666	3,584
Charge-Offs	0	0	0	(14)
Recoveries	12	20	38	44
Provision (Credit)	(310)	(662)	(316)	232
Balance at End of Period	3,388	3,846	3,388	3,846
Real estate – residential mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	1,253	1,150	1,102	1,169
Charge-Offs	(123)	(109)	(340)	(263)
Recoveries	34	53	111	128
Provision (Credit)	75	70	366	130
Balance at End of Period	1,239	1,164	1,239	1,164
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	125	139	128	151
Charge-Offs	(29)	(42)	(181)	(138)
Recoveries	7	52	42	113
Provision (Credit)	25	(10)	139	13
Balance at End of Period	128	139	128	139
Allocation for general risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	891	790	1,020	987
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	35	240	(94)	43
Balance at End of Period	$ 926	$ 1,030	$ 926	$ 1,030

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 other addition (reduction) in allowance reserve for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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Amount of direct write-downs of financing receivables charged against the allowance.

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-SubTopic 10
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-Paragraph 11B
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