Loans (Details 8) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of investment in past due loans
Total Past Due	$ 19,042	$ 17,886
Loans Not Past Due	1,620,149	1,559,495
Loans	1,639,191	1,577,381
Commercial real estate
Schedule of investment in past due loans
Loans	659,559	630,700
Commercial
Schedule of investment in past due loans
Loans	276,039	264,861
Residential real estate
Schedule of investment in past due loans
Loans	478,827	468,884
Consumer
Schedule of investment in past due loans
Loans	224,766	212,936
Financing Receivables, 30 to 59 Days Past Due
Schedule of investment in past due loans
Total Past Due	8,786	8,012
Financing Receivables, 60 to 89 Days Past Due
Schedule of investment in past due loans
Total Past Due	1,850	2,179
Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of investment in past due loans
Total Past Due	8,406	7,695
Residential real estate, 1-4 family residential | Residential real estate
Schedule of investment in past due loans
Loans	377,315	368,592
Residential real estate, Home equity lines of credit | Residential real estate
Schedule of investment in past due loans
Loans	101,512	100,292
Consumer, Indirect | Consumer
Schedule of investment in past due loans
Loans	173,359	160,848
Consumer, Direct | Consumer
Schedule of investment in past due loans
Loans	41,361	43,084
Consumer, Other | Consumer
Schedule of investment in past due loans
Loans	10,046	9,004
Originated Loans
Schedule of investment in past due loans
Total Past Due	13,195	13,100
Loans Not Past Due	1,343,474	1,251,918
Loans	1,356,669	1,265,018
Originated Loans | Financing Receivables, 30 to 59 Days Past Due
Schedule of investment in past due loans
Total Past Due	6,250	5,745
Originated Loans | Financing Receivables, 60 to 89 Days Past Due
Schedule of investment in past due loans
Total Past Due	1,423	1,854
Originated Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of investment in past due loans
Total Past Due	5,522	5,501
Originated Loans | Commercial real estate, Owner occupied | Commercial real estate
Schedule of investment in past due loans
Total Past Due	410	845
Loans Not Past Due	145,135	139,081
Loans	145,545	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	37	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	373	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	225,000	198,588
Loans	225,000	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	425	45
Loans Not Past Due	93,965	70,398
Loans	94,390	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	388	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	37	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	72,086	88,703
Loans	72,086	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	1,200	544
Loans Not Past Due	207,742	192,335
Loans	208,942	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	919	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	27	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	254	249
Originated Loans | Commercial, Agricultural | Commercial
Schedule of investment in past due loans
Total Past Due	8	76
Loans Not Past Due	32,940	32,605
Loans	32,948	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	0	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	8	2
Originated Loans | Residential real estate, 1-4 family residential | Residential real estate
Schedule of investment in past due loans
Total Past Due	5,808	5,493
Loans Not Past Due	283,940	266,338
Loans	289,748	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	2,114	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	279	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	3,415	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	1,053	783
Loans Not Past Due	73,924	70,754
Loans	74,977	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	256	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	0	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	797	610
Originated Loans | Consumer, Indirect | Consumer
Schedule of investment in past due loans
Total Past Due	3,126	4,076
Loans Not Past Due	170,233	156,772
Loans	173,359	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	1,901	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	784	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	441	818
Originated Loans | Consumer, Direct | Consumer
Schedule of investment in past due loans
Total Past Due	1,097	1,098
Loans Not Past Due	28,676	27,608
Loans	29,773	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	603	632
Originated Loans | Consumer, Direct | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	311	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	183	216
Originated Loans | Consumer, Other | Consumer
Schedule of investment in past due loans
Total Past Due	68	140
Loans Not Past Due	9,833	8,736
Loans	9,901	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	32	115
Originated Loans | Consumer, Other | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	22	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	14	14
Acquired Loans
Schedule of investment in past due loans
Total Past Due	5,847	4,786
Loans Not Past Due	276,675	307,577
Loans	282,522	312,363
Acquired Loans | Financing Receivables, 30 to 59 Days Past Due
Schedule of investment in past due loans
Total Past Due	2,536	2,267
Acquired Loans | Financing Receivables, 60 to 89 Days Past Due
Schedule of investment in past due loans
Total Past Due	427	325
Acquired Loans | Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of investment in past due loans
Total Past Due	2,884	2,194
Acquired Loans | Commercial real estate, Owner occupied | Commercial real estate
Schedule of investment in past due loans
Total Past Due	308	0
Loans Not Past Due	49,530	53,051
Loans	49,838	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	308	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	88	216
Loans Not Past Due	18,229	20,042
Loans	18,317	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	0	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	915	454
Loans Not Past Due	42,069	47,301
Loans	42,984	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	407	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	0	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	508	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	11,399	11,976
Loans	11,399	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	1,004	1,385
Loans Not Past Due	22,306	25,709
Loans	23,310	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	56	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	83	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	865	962
Acquired Loans | Commercial, Agricultural | Commercial
Schedule of investment in past due loans
Total Past Due	3	96
Loans Not Past Due	10,836	12,111
Loans	10,839	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	3	87
Acquired Loans | Commercial, Agricultural | Financing Receivables, 60 to 89 Days Past Due | Commercial
Schedule of investment in past due loans
Total Past Due	0	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	0	9
Acquired Loans | Residential real estate, 1-4 family residential | Residential real estate
Schedule of investment in past due loans
Total Past Due	2,401	1,617
Loans Not Past Due	85,166	95,144
Loans	87,567	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	1,260	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	148	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	993	682
Acquired Loans | Residential real estate, Home equity lines of credit | Residential real estate
Schedule of investment in past due loans
Total Past Due	304	331
Loans Not Past Due	26,231	28,424
Loans	26,535	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	40	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	0	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	264	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	823	686
Loans Not Past Due	10,765	13,692
Loans	11,588	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	462	380
Acquired Loans | Consumer, Direct | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	195	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	166	155
Acquired Loans | Consumer, Other | Consumer
Schedule of investment in past due loans
Total Past Due	1	1
Loans Not Past Due	144	127
Loans	145	128
Acquired Loans | Consumer, Other | Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	0	0
Acquired Loans | Consumer, Other | Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of investment in past due loans
Total Past Due	1	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