Loans - Internal Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 657,754	$ 633,547
Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	562,905	535,415
Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	551,764	510,840
Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,894	19,831
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,247	4,744
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	71,699	67,360
Agriculture & AG RE
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44,071	50,121
Agriculture & AG RE | Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44,071	50,121
Agriculture & AG RE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	43,752	50,121
Agriculture & AG RE | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Agriculture & AG RE | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	319	0
Agriculture & AG RE | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Construction, Land & Development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	22,207	26,016
Construction, Land & Development | Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	22,207	26,016
Construction, Land & Development | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	22,065	25,825
Construction, Land & Development | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	64
Construction, Land & Development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	142	127
Construction, Land & Development | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial RE
Financing Receivable, Recorded Investment [Line Items]
Total Loans	424,928	391,918
1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	91,629	95,227
1-4 Family Residential | Senior Lien
Financing Receivable, Recorded Investment [Line Items]
Total Loans	51,952	53,366
1-4 Family Residential | Jr. Lien & Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total Loans	39,677	41,861
1-4 Family Residential | Unrated
Financing Receivable, Recorded Investment [Line Items]
Total Loans	86,217	89,699
1-4 Family Residential | Unrated | Senior Lien
Financing Receivable, Recorded Investment [Line Items]
Total Loans	47,289	48,319
1-4 Family Residential | Unrated | Jr. Lien & Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total Loans	38,928	41,380
1-4 Family Residential | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,385	4,179
1-4 Family Residential | Special mention | Senior Lien
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,291	4,011
1-4 Family Residential | Special mention | Jr. Lien & Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total Loans	94	168
1-4 Family Residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,027	1,349
1-4 Family Residential | Substandard | Senior Lien
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,372	1,036
1-4 Family Residential | Substandard | Jr. Lien & Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total Loans	655	313
1-4 Family Residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
1-4 Family Residential | Doubtful | Senior Lien
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
1-4 Family Residential | Doubtful | Jr. Lien & Lines of Credit
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Closed-end | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	25,390	24,736
Closed-end | Commercial | Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	25,390	24,736
Closed-end | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	24,930	24,303
Closed-end | Commercial | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	287	304
Closed-end | Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	173	129
Closed-end | Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Line of credit | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total Loans	46,309	42,624
Line of credit | Commercial | Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	46,309	42,624
Line of credit | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	45,509	42,374
Line of credit | Commercial | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	250	250
Line of credit | Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	550	0
Line of credit | Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Owner occupied | Commercial RE
Financing Receivable, Recorded Investment [Line Items]
Total Loans	197,494	172,651
Owner occupied | Commercial RE | Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	197,494	172,651
Owner occupied | Commercial RE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	196,035	164,538
Owner occupied | Commercial RE | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	837	7,701
Owner occupied | Commercial RE | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	622	412
Owner occupied | Commercial RE | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Non-owner occupied | Commercial RE
Financing Receivable, Recorded Investment [Line Items]
Total Loans	227,434	219,267
Non-owner occupied | Commercial RE | Internal Noninvestment Grade
Financing Receivable, Recorded Investment [Line Items]
Total Loans	227,434	219,267
Non-owner occupied | Commercial RE | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	219,473	203,679
Non-owner occupied | Commercial RE | Special mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,520	11,512
Non-owner occupied | Commercial RE | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	441	4,076
Non-owner occupied | Commercial RE | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0	$ 0