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Loans and Allowance for Loan Losses (Details 8) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	$ 12,735	$ 14,624	$ 13,030	$ 14,780	$ 11,556
Recognized interest income	183	158	478	450	536
Commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	10,002	12,587	10,286	12,737	9,242
Recognized interest income	140	140	397	395	447
Commercial [Member] | Owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,182	2,000	2,198	2,009	2,263
Recognized interest income	25	30	78	72	112
Commercial [Member] | Non-owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	4,322	5,515	4,503	5,594	4,106
Recognized interest income	57	39	154	124	200
Commercial [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment
Recognized interest income
Commercial [Member] | Business [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	3,498	5,072	3,585	5,134	2,873
Recognized interest income	58	71	165	199	135
Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,733	2,037	2,744	2,043	2,314
Recognized interest income	43	18	81	55	89
Consumer [Member] | Real estate [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,361	1,573	2,370	1,578	1,854
Recognized interest income	40	16	73	49	81
Consumer [Member] | Home equity [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	196	207	196	257	257
Recognized interest income	2		4	1	2
Consumer [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment
Recognized interest income
Consumer [Member] | Other [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	176	257	178	208	203
Recognized interest income	$ 1	$ 2	$ 4	$ 5	$ 6

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-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 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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- References

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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