Loans (Details 8) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of investment in past due loans
Total Past Due	$ 19,848	$ 17,886
Loans Not Past Due	1,671,684	1,559,495
Loans	1,691,532	1,577,381
Commercial real estate
Schedule of investment in past due loans
Loans	698,172	630,700
Commercial
Schedule of investment in past due loans
Loans	277,694	264,861
Residential real estate
Schedule of investment in past due loans
Loans	489,150	468,884
Consumer
Schedule of investment in past due loans
Loans	226,516	212,936
Financing Receivables, 30 to 59 Days Past Due
Schedule of investment in past due loans
Total Past Due	8,126	8,012
Financing Receivables, 60 to 89 Days Past Due
Schedule of investment in past due loans
Total Past Due	2,500	2,179
Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of investment in past due loans
Total Past Due	9,222	7,695
Residential real estate, 1-4 family residential | Residential real estate
Schedule of investment in past due loans
Loans	385,880	368,592
Residential real estate, Home equity lines of credit | Residential real estate
Schedule of investment in past due loans
Loans	103,270	100,292
Consumer, Indirect | Consumer
Schedule of investment in past due loans
Loans	174,114	160,848
Consumer, Direct | Consumer
Schedule of investment in past due loans
Loans	41,371	43,084
Consumer, Other | Consumer
Schedule of investment in past due loans
Loans	11,031	9,004
Originated Loans
Schedule of investment in past due loans
Total Past Due	13,179	13,100
Loans Not Past Due	1,410,161	1,251,918
Loans	1,423,340	1,265,018
Originated Loans | Financing Receivables, 30 to 59 Days Past Due
Schedule of investment in past due loans
Total Past Due	5,000	5,745
Originated Loans | Financing Receivables, 60 to 89 Days Past Due
Schedule of investment in past due loans
Total Past Due	2,011	1,854
Originated Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of investment in past due loans
Total Past Due	6,168	5,501
Originated Loans | Commercial real estate, Owner occupied | Commercial real estate
Schedule of investment in past due loans
Total Past Due	411	845
Loans Not Past Due	152,303	139,081
Loans	152,714	139,926
Originated Loans | Commercial real estate, Owner occupied | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	58	4
Originated Loans | Commercial real estate, Owner occupied | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	340
Originated Loans | Commercial real estate, Owner occupied | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	353	501
Originated Loans | Commercial real estate, Non-owner occupied | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Loans Not Past Due	240,304	198,588
Loans	240,304	198,588
Originated Loans | Commercial real estate, Non-owner occupied | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial real estate, Non-owner occupied | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial real estate, Non-owner occupied | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial real estate, Farmland | Commercial real estate
Schedule of investment in past due loans
Total Past Due	452	45
Loans Not Past Due	94,430	70,398
Loans	94,882	70,443
Originated Loans | Commercial real estate, Farmland | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	419	0
Originated Loans | Commercial real estate, Farmland | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial real estate, Farmland | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	33	45
Originated Loans | Commercial real estate, Other | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Loans Not Past Due	91,673	88,703
Loans	91,673	88,703
Originated Loans | Commercial real estate, Other | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial real estate, Other | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial real estate, Other | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial, Commercial and industrial | Commercial
Schedule of investment in past due loans
Total Past Due	513	544
Loans Not Past Due	212,653	192,335
Loans	213,166	192,879
Originated Loans | Commercial, Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	237	292
Originated Loans | Commercial, Commercial and industrial | Financing Receivables, 60 to 89 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	98	3
Originated Loans | Commercial, Commercial and industrial | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	178	249
Originated Loans | Commercial, Agricultural | Commercial
Schedule of investment in past due loans
Total Past Due	289	76
Loans Not Past Due	33,757	32,605
Loans	34,046	32,681
Originated Loans | Commercial, Agricultural | Financing Receivables, 30 to 59 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	112	74
Originated Loans | Commercial, Agricultural | Financing Receivables, 60 to 89 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	0	0
Originated Loans | Commercial, Agricultural | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	177	2
Originated Loans | Residential real estate, 1-4 family residential | Residential real estate
Schedule of investment in past due loans
Total Past Due	6,004	5,493
Loans Not Past Due	296,610	266,338
Loans	302,614	271,831
Originated Loans | Residential real estate, 1-4 family residential | Financing Receivables, 30 to 59 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	1,385	2,044
Originated Loans | Residential real estate, 1-4 family residential | Financing Receivables, 60 to 89 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	730	403
Originated Loans | Residential real estate, 1-4 family residential | Financing Receivables, Equal to Greater than 90 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	3,889	3,046
Originated Loans | Residential real estate, Home equity lines of credit | Residential real estate
Schedule of investment in past due loans
Total Past Due	885	783
Loans Not Past Due	77,220	70,754
Loans	78,105	71,537
Originated Loans | Residential real estate, Home equity lines of credit | Financing Receivables, 30 to 59 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	83	155
Originated Loans | Residential real estate, Home equity lines of credit | Financing Receivables, 60 to 89 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	9	18
Originated Loans | Residential real estate, Home equity lines of credit | Financing Receivables, Equal to Greater than 90 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	793	610
Originated Loans | Consumer, Indirect | Consumer
Schedule of investment in past due loans
Total Past Due	3,278	4,076
Loans Not Past Due	170,836	156,772
Loans	174,114	160,848
Originated Loans | Consumer, Indirect | Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	1,888	2,429
Originated Loans | Consumer, Indirect | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	818	829
Originated Loans | Consumer, Indirect | Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	572	818
Originated Loans | Consumer, Direct | Consumer
Schedule of investment in past due loans
Total Past Due	1,302	1,098
Loans Not Past Due	29,546	27,608
Loans	30,848	28,706
Originated Loans | Consumer, Direct | Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	802	632
Originated Loans | Consumer, Direct | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	330	250
Originated Loans | Consumer, Direct | Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	170	216
Originated Loans | Consumer, Other | Consumer
Schedule of investment in past due loans
Total Past Due	45	140
Loans Not Past Due	10,829	8,736
Loans	10,874	8,876
Originated Loans | Consumer, Other | Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	16	115
Originated Loans | Consumer, Other | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	26	11
Originated Loans | Consumer, Other | Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	3	14
Acquired Loans
Schedule of investment in past due loans
Total Past Due	6,669	4,786
Loans Not Past Due	261,523	307,577
Loans	268,192	312,363
Acquired Loans | Financing Receivables, 30 to 59 Days Past Due
Schedule of investment in past due loans
Total Past Due	3,126	2,267
Acquired Loans | Financing Receivables, 60 to 89 Days Past Due
Schedule of investment in past due loans
Total Past Due	489	325
Acquired Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of investment in past due loans
Total Past Due	3,054	2,194
Acquired Loans | Commercial real estate, Owner occupied | Commercial real estate
Schedule of investment in past due loans
Total Past Due	512	0
Loans Not Past Due	46,988	53,051
Loans	47,500	53,051
Acquired Loans | Commercial real estate, Owner occupied | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	512	0
Acquired Loans | Commercial real estate, Owner occupied | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Commercial real estate, Owner occupied | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Commercial real estate, Non-owner occupied | Commercial real estate
Schedule of investment in past due loans
Total Past Due	148	216
Loans Not Past Due	17,973	20,042
Loans	18,121	20,258
Acquired Loans | Commercial real estate, Non-owner occupied | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	60	0
Acquired Loans | Commercial real estate, Non-owner occupied | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Commercial real estate, Non-owner occupied | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	88	216
Acquired Loans | Commercial real estate, Farmland | Commercial real estate
Schedule of investment in past due loans
Total Past Due	859	454
Loans Not Past Due	41,397	47,301
Loans	42,256	47,755
Acquired Loans | Commercial real estate, Farmland | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	527	454
Acquired Loans | Commercial real estate, Farmland | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	75	0
Acquired Loans | Commercial real estate, Farmland | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	257	0
Acquired Loans | Commercial real estate, Other | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Loans Not Past Due	10,722	11,976
Loans	10,722	11,976
Acquired Loans | Commercial real estate, Other | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Commercial real estate, Other | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Commercial real estate, Other | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Commercial, Commercial and industrial | Commercial
Schedule of investment in past due loans
Total Past Due	1,107	1,385
Loans Not Past Due	18,527	25,709
Loans	19,634	27,094
Acquired Loans | Commercial, Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	246	327
Acquired Loans | Commercial, Commercial and industrial | Financing Receivables, 60 to 89 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	57	96
Acquired Loans | Commercial, Commercial and industrial | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	804	962
Acquired Loans | Commercial, Agricultural | Commercial
Schedule of investment in past due loans
Total Past Due	333	96
Loans Not Past Due	10,515	12,111
Loans	10,848	12,207
Acquired Loans | Commercial, Agricultural | Financing Receivables, 30 to 59 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	20	87
Acquired Loans | Commercial, Agricultural | Financing Receivables, 60 to 89 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	6	0
Acquired Loans | Commercial, Agricultural | Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	307	9
Acquired Loans | Residential real estate, 1-4 family residential | Residential real estate
Schedule of investment in past due loans
Total Past Due	2,491	1,617
Loans Not Past Due	80,775	95,144
Loans	83,266	96,761
Acquired Loans | Residential real estate, 1-4 family residential | Financing Receivables, 30 to 59 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	1,289	858
Acquired Loans | Residential real estate, 1-4 family residential | Financing Receivables, 60 to 89 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	100	77
Acquired Loans | Residential real estate, 1-4 family residential | Financing Receivables, Equal to Greater than 90 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	1,102	682
Acquired Loans | Residential real estate, Home equity lines of credit | Residential real estate
Schedule of investment in past due loans
Total Past Due	481	331
Loans Not Past Due	24,684	28,424
Loans	25,165	28,755
Acquired Loans | Residential real estate, Home equity lines of credit | Financing Receivables, 30 to 59 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	168	161
Acquired Loans | Residential real estate, Home equity lines of credit | Financing Receivables, 60 to 89 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	14	0
Acquired Loans | Residential real estate, Home equity lines of credit | Financing Receivables, Equal to Greater than 90 Days Past Due | Residential real estate
Schedule of investment in past due loans
Total Past Due	299	170
Acquired Loans | Consumer, Indirect | Consumer
Schedule of investment in past due loans
Loans	0	0
Acquired Loans | Consumer, Direct | Consumer
Schedule of investment in past due loans
Total Past Due	737	686
Loans Not Past Due	9,786	13,692
Loans	10,523	14,378
Acquired Loans | Consumer, Direct | Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	303	380
Acquired Loans | Consumer, Direct | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	237	151
Acquired Loans | Consumer, Direct | Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	197	155
Acquired Loans | Consumer, Other | Consumer
Schedule of investment in past due loans
Total Past Due	1	1
Loans Not Past Due	156	127
Loans	157	128
Acquired Loans | Consumer, Other | Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	1	0
Acquired Loans | Consumer, Other | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	0	1
Acquired Loans | Consumer, Other | Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	$ 0	$ 0