Credit Quality Indicators (Details 1) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Loans	$ 1,691,532	$ 1,577,381
Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	1,423,340	1,265,018
Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	268,192	312,363
Residential real estate
Financing Receivable Recorded Investment [Line Items]
Loans	489,150	468,884
Residential real estate | Residential real estate, 1-4 family residential
Financing Receivable Recorded Investment [Line Items]
Loans	385,880	368,592
Residential real estate | Residential real estate, 1-4 family residential | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	302,614	271,831
Residential real estate | Residential real estate, 1-4 family residential | Originated Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	298,725	268,785
Residential real estate | Residential real estate, 1-4 family residential | Originated Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	3,889	3,046
Residential real estate | Residential real estate, 1-4 family residential | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	83,266	96,761
Residential real estate | Residential real estate, 1-4 family residential | Acquired Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	82,164	96,079
Residential real estate | Residential real estate, 1-4 family residential | Acquired Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	1,102	682
Residential real estate | Residential real estate, Home equity lines of credit
Financing Receivable Recorded Investment [Line Items]
Loans	103,270	100,292
Residential real estate | Residential real estate, Home equity lines of credit | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	78,105	71,537
Residential real estate | Residential real estate, Home equity lines of credit | Originated Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	77,312	70,927
Residential real estate | Residential real estate, Home equity lines of credit | Originated Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	793	610
Residential real estate | Residential real estate, Home equity lines of credit | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	25,165	28,755
Residential real estate | Residential real estate, Home equity lines of credit | Acquired Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	24,866	28,585
Residential real estate | Residential real estate, Home equity lines of credit | Acquired Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	299	170
Consumer
Financing Receivable Recorded Investment [Line Items]
Loans	226,516	212,936
Consumer | Consumer, Indirect
Financing Receivable Recorded Investment [Line Items]
Loans	174,114	160,848
Consumer | Consumer, Indirect | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	174,114	160,848
Consumer | Consumer, Indirect | Originated Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	173,542	160,030
Consumer | Consumer, Indirect | Originated Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	572	818
Consumer | Consumer, Indirect | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	0	0
Consumer | Consumer, Indirect | Acquired Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	0	0
Consumer | Consumer, Indirect | Acquired Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	0	0
Consumer | Consumer, Direct
Financing Receivable Recorded Investment [Line Items]
Loans	41,371	43,084
Consumer | Consumer, Direct | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	30,848	28,706
Consumer | Consumer, Direct | Originated Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	30,678	28,490
Consumer | Consumer, Direct | Originated Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	170	216
Consumer | Consumer, Direct | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	10,523	14,378
Consumer | Consumer, Direct | Acquired Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	10,326	14,223
Consumer | Consumer, Direct | Acquired Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	197	155
Consumer | Consumer, Other
Financing Receivable Recorded Investment [Line Items]
Loans	11,031	9,004
Consumer | Consumer, Other | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Loans	10,874	8,876
Consumer | Consumer, Other | Originated Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	10,871	8,862
Consumer | Consumer, Other | Originated Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	3	14
Consumer | Consumer, Other | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Loans	157	128
Consumer | Consumer, Other | Acquired Loans | Performing Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	157	128
Consumer | Consumer, Other | Acquired Loans | Nonperforming Financing Receivable
Financing Receivable Recorded Investment [Line Items]
Loans	$ 0	$ 0