Loans, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	$ 753	$ 735
Collectively evaluated for impairment	13,494	13,110
Total	14,247	13,845	$ 13,084	$ 12,884
Real Estate Loans [Member] | Residential [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	31	32
Collectively evaluated for impairment	1,123	1,082
Total	1,154	1,114	1,089	1,105
Real Estate Loans [Member] | Commercial [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	335	251
Collectively evaluated for impairment	4,394	4,298
Total	4,729	4,549	4,130	4,115
Real Estate Loans [Member] | Agricultural [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	86	151
Collectively evaluated for impairment	4,792	4,871
Total	4,878	5,022	4,392	4,264
Real Estate Loans [Member] | Construction [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	56	43
Total	56	43	32	58
Consumer [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	117	112
Total	117	112	124	120
Other Commercial Loans [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	148	147
Collectively evaluated for impairment	1,149	1,108
Total	1,297	1,255	1,283	1,354
Other Agricultural Loans [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	153	154
Collectively evaluated for impairment	682	807
Total	835	961	756	752
State and Political Subdivision Loans [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	558	536
Total	558	536	565	762
Unallocated [Member]
Summary of allowance for loan losses into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment [Abstract]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	623	253
Total	$ 623	$ 253	$ 713	$ 354