Loans, Past Due (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Recorded investment of past due [Abstract]
Total Past Due	$ 14,320	$ 9,288
Current	691,126	681,925
PCI	3,669	3,818
Total financing receivables	709,115	695,031
90 Days or Greater and Accruing	1,104	623
Financing receivables on nonaccrual status [Abstract]
Total Past Due And Non-accrual	9,285	5,608
Current And Non-accrual	921	923
PCI Loans considered non accrual	0	0
Financing receivable nonaccrual status	10,206	6,531
Financing receivables on accrual status [Abstract]
Total Past Due And Still Accruing	5,035	3,680
Current And Still Accruing	690,205	681,002
PCI Loans still accruing	3,669	3,818
Total Financing Receivables And Still Accruing	$ 698,909	688,500
Minimum [Member]
Financing receivables on nonaccrual status [Abstract]
Period of past due after which loans considered as non accrual	90 days
30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	$ 3,756	2,509
Financing receivables on nonaccrual status [Abstract]
Total Past Due And Non-accrual	373	54
Financing receivables on accrual status [Abstract]
Total Past Due And Still Accruing	3,383	2,455
60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	4,307	773
Financing receivables on nonaccrual status [Abstract]
Total Past Due And Non-accrual	3,759	171
Financing receivables on accrual status [Abstract]
Total Past Due And Still Accruing	548	602
90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	6,257	6,006
Financing receivables on nonaccrual status [Abstract]
Total Past Due And Non-accrual	5,153	5,383
Financing receivables on accrual status [Abstract]
Total Past Due And Still Accruing	1,104	623
Real Estate Loans [Member] | Mortgages [Member]
Recorded investment of past due [Abstract]
Total Past Due	2,293	1,457
Current	141,814	139,547
PCI	34	35
Total financing receivables	144,141	141,039
90 Days or Greater and Accruing	195	321
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	1,279	949
Real Estate Loans [Member] | Mortgages [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	1,564	487
Real Estate Loans [Member] | Mortgages [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	25	283
Real Estate Loans [Member] | Mortgages [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	704	687
Real Estate Loans [Member] | Home Equity [Member]
Recorded investment of past due [Abstract]
Total Past Due	629	766
Current	59,210	61,602
PCI	0	0
Total financing receivables	59,839	62,368
90 Days or Greater and Accruing	24	73
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	106	59
Real Estate Loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	478	630
Real Estate Loans [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	74	15
Real Estate Loans [Member] | Home Equity [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	77	121
Real Estate Loans [Member] | Commercial [Member]
Recorded investment of past due [Abstract]
Total Past Due	6,362	5,020
Current	238,517	230,352
PCI	2,016	2,170
Total financing receivables	246,895	237,542
90 Days or Greater and Accruing	461	60
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	4,711	4,422
Real Estate Loans [Member] | Commercial [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	1,257	824
Real Estate Loans [Member] | Commercial [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	958	57
Real Estate Loans [Member] | Commercial [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	4,147	4,139
Real Estate Loans [Member] | Agricultural [Member]
Recorded investment of past due [Abstract]
Total Past Due	389	344
Current	61,266	56,740
PCI	737	738
Total financing receivables	62,392	57,822
90 Days or Greater and Accruing	165	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	29	34
Real Estate Loans [Member] | Agricultural [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	166	177
Real Estate Loans [Member] | Agricultural [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	58	167
Real Estate Loans [Member] | Agricultural [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	165	0
Real Estate Loans [Member] | Construction [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
Current	10,481	15,011
PCI	0	0
Total financing receivables	10,481	15,011
90 Days or Greater and Accruing	0	0
Real Estate Loans [Member] | Construction [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
Real Estate Loans [Member] | Construction [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
Real Estate Loans [Member] | Construction [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
Consumer [Member]
Recorded investment of past due [Abstract]
Total Past Due	297	325
Current	11,136	11,209
PCI	6	9
Total financing receivables	11,439	11,543
90 Days or Greater and Accruing	9	9
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	39	55
Consumer [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	210	239
Consumer [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	39	37
Consumer [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	48	49
Other Commercial Loans [Member]
Recorded investment of past due [Abstract]
Total Past Due	4,089	1,367
Current	50,721	55,316
PCI	876	866
Total financing receivables	55,686	57,549
90 Days or Greater and Accruing	146	160
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	4,042	1,012
Other Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	15	143
Other Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	3,062	214
Other Commercial Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	1,012	1,010
Other Agricultural Loans [Member]
Recorded investment of past due [Abstract]
Total Past Due	261	9
Current	18,142	13,648
PCI	0	0
Total financing receivables	18,403	13,657
90 Days or Greater and Accruing	104	0
Other Agricultural Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	66	9
Other Agricultural Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	91	0
Other Agricultural Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	104	0
State and Political Subdivision Loans [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
Current	99,839	98,500
PCI	0	0
Total financing receivables	99,839	98,500
90 Days or Greater and Accruing	0	0
State and Political Subdivision Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
State and Political Subdivision Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total Past Due	0	0
State and Political Subdivision Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total Past Due	$ 0	$ 0