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Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	$ 10,080	$ 9,520	$ 9,932	$ 9,921
Charge-Offs	(93)	(62)	(264)	(3,644)
Recoveries	79	38	173	119
Provision (Credit)	325	250	550	3,350
Balance at End of Period	10,391	9,746	10,391	9,746
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	4,024	3,567	4,041	4,244
Charge-Offs	0	(14)	0	(3,353)
Recoveries	6	4	13	11
Provision (Credit)	(205)	765	(229)	3,420
Balance at End of Period	3,825	4,322	3,825	4,322
Commercial loans secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	3,747	3,706	3,584	3,449
Charge-Offs	0	0	(14)	0
Recoveries	3	8	5	36
Provision (Credit)	737	(440)	912	(211)
Balance at End of Period	4,487	3,274	4,487	3,274
Real estate - mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	1,167	1,157	1,169	1,173
Charge-Offs	(60)	(8)	(154)	(46)
Recoveries	27	20	93	62
Provision (Credit)	17	(94)	43	(114)
Balance at End of Period	1,151	1,075	1,151	1,075
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	149	145	151	151
Charge-Offs	(33)	(40)	(96)	(245)
Recoveries	43	6	62	10
Provision (Credit)	(21)	24	21	219
Balance at End of Period	138	135	138	135
Allocation for general risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	993	945	987	904
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (Credit)	(203)	(5)	(197)	36
Balance at End of Period	$ 790	$ 940	$ 790	$ 940

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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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