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Loans (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan losses
Beginning balance	$ 10,852	$ 8,978	$ 7,632
Provision for loan losses	3,350	3,870	3,510
Loans charged off	(3,286)	(2,801)	(3,204)
Recoveries	1,399	805	1,040
Ending balance	12,315	10,852	8,978
Commercial real estate
Allowance for loan losses
Beginning balance	3,577	3,127	2,676
Provision for loan losses	298	784	857
Loans charged off	(207)	(349)	(536)
Recoveries	592	15	130
Ending balance	4,260	3,577	3,127
Commercial
Allowance for loan losses
Beginning balance	1,874	1,373	1,420
Provision for loan losses	446	701	234
Loans charged off	(375)	(245)	(290)
Recoveries	66	45	9
Ending balance	2,011	1,874	1,373
Residential real estate
Allowance for loan losses
Beginning balance	2,205	1,845	1,689
Provision for loan losses	378	436	354
Loans charged off	(162)	(188)	(320)
Recoveries	100	112	122
Ending balance	2,521	2,205	1,845
Consumer
Allowance for loan losses
Beginning balance	2,766	2,160	1,663
Provision for loan losses	1,983	1,992	1,776
Loans charged off	(2,542)	(2,019)	(2,058)
Recoveries	641	633	779
Ending balance	2,848	2,766	2,160
Unallocated
Allowance for loan losses
Beginning balance	430	473	184
Provision for loan losses	245	(43)	289
Loans charged off	0	0	0
Recoveries	0	0	0
Ending balance	$ 675	$ 430	$ 473

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Provision (reversal) for loan losses expensed.

+ References

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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