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Loans (Details 10) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Loans	$ 1,577,381	$ 1,427,635
Residential real estate
Financing Receivable Recorded Investment [Line Items]
Loans	468,884	430,195
Residential real estate | Residential real estate, 1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Loans	368,592	335,718
Residential real estate | Residential real estate, Home equity lines of credit
Financing Receivable Recorded Investment [Line Items]
Loans	100,292	94,477
Consumer
Financing Receivable Recorded Investment [Line Items]
Loans	212,936	218,100
Consumer | Consumer, Indirect
Financing Receivable Recorded Investment [Line Items]
Loans	160,848	161,713
Consumer | Consumer, Direct
Financing Receivable Recorded Investment [Line Items]
Loans	43,084	48,528
Consumer | Consumer, Other
Financing Receivable Recorded Investment [Line Items]
Loans	9,004	7,859
Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	1,265,018	1,054,496
Originated Loans | Residential real estate | Residential real estate, 1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Loans	271,831	223,700
Originated Loans | Residential real estate | Residential real estate, 1-4 family residential | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	268,785	221,476
Originated Loans | Residential real estate | Residential real estate, 1-4 family residential | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	3,046	2,224
Originated Loans | Residential real estate | Residential real estate, Home equity lines of credit
Financing Receivable Recorded Investment [Line Items]
Loans	71,537	59,682
Originated Loans | Residential real estate | Residential real estate, Home equity lines of credit | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	70,927	59,362
Originated Loans | Residential real estate | Residential real estate, Home equity lines of credit | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	610	320
Originated Loans | Consumer | Consumer, Indirect
Financing Receivable Recorded Investment [Line Items]
Loans	160,848	161,713
Originated Loans | Consumer | Consumer, Indirect | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	160,030	160,977
Originated Loans | Consumer | Consumer, Indirect | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	818	736
Originated Loans | Consumer | Consumer, Direct
Financing Receivable Recorded Investment [Line Items]
Loans	28,706	26,846
Originated Loans | Consumer | Consumer, Direct | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	28,490	26,772
Originated Loans | Consumer | Consumer, Direct | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	216	74
Originated Loans | Consumer | Consumer, Other
Financing Receivable Recorded Investment [Line Items]
Loans	8,876	7,612
Originated Loans | Consumer | Consumer, Other | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	8,862	7,596
Originated Loans | Consumer | Consumer, Other | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	14	16
Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	312,363	373,139
Acquired Loans | Residential real estate | Residential real estate, 1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Loans	96,761	112,018
Acquired Loans | Residential real estate | Residential real estate, 1-4 family residential | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	96,079	111,087
Acquired Loans | Residential real estate | Residential real estate, 1-4 family residential | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	682	931
Acquired Loans | Residential real estate | Residential real estate, Home equity lines of credit
Financing Receivable Recorded Investment [Line Items]
Loans	28,755	34,795
Acquired Loans | Residential real estate | Residential real estate, Home equity lines of credit | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	28,585	34,567
Acquired Loans | Residential real estate | Residential real estate, Home equity lines of credit | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	170	228
Acquired Loans | Consumer | Consumer, Indirect
Financing Receivable Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Consumer | Consumer, Indirect | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Consumer | Consumer, Indirect | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	0	0
Acquired Loans | Consumer | Consumer, Direct
Financing Receivable Recorded Investment [Line Items]
Loans	14,378	21,682
Acquired Loans | Consumer | Consumer, Direct | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	14,223	21,498
Acquired Loans | Consumer | Consumer, Direct | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	155	184
Acquired Loans | Consumer | Consumer, Other
Financing Receivable Recorded Investment [Line Items]
Loans	128	247
Acquired Loans | Consumer | Consumer, Other | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	128	247
Acquired Loans | Consumer | Consumer, Other | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	$ 0	$ 0

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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