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Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	$ 9,932	$ 10,080	$ 10,214	$ 9,932
Charge-Offs	(568)	(93)	(943)	(264)
Recoveries	107	79	150	173
Provision (Credit)	50	325	100	550
Balance at End of Period	9,521	10,391	9,521	10,391
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	3,984	4,024	4,298	4,041
Charge-Offs	(412)	0	(574)	0
Recoveries	4	6	12	13
Provision (Credit)	(10)	(206)	(170)	(230)
Balance at End of Period	3,566	3,824	3,566	3,824
Commercial loans secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	3,550	3,746	3,666	3,584
Charge-Offs	0	0	0	(14)
Recoveries	13	13	26	24
Provision (Credit)	123	729	(6)	894
Balance at End of Period	3,686	4,488	3,686	4,488
Real estate-mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	1,267	1,168	1,102	1,169
Charge-Offs	(103)	(60)	(217)	(154)
Recoveries	67	17	77	75
Provision (Credit)	22	25	291	60
Balance at End of Period	1,253	1,150	1,253	1,150
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	142	149	128	151
Charge-Offs	(53)	(33)	(152)	(96)
Recoveries	23	43	35	61
Provision (Credit)	13	(20)	114	23
Balance at End of Period	125	139	125	139
Allocation for general risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	989	993	1,020	987
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	(98)	(203)	(129)	(197)
Balance at End of Period	$ 891	$ 790	$ 891	$ 790

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
-Subparagraph (c)(4)
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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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