Loans, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
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	$ 269		$ 510
Collectively evaluated for impairment	16,662		15,305
Total	16,931	$ 16,560	15,815	$ 14,827	$ 14,247	$ 13,845
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	16		18
Collectively evaluated for impairment	1,158		1,156
Total	1,174	1,167	1,174	1,206	1,154	1,114
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	97		95
Collectively evaluated for impairment	7,009		6,121
Total	7,106	6,683	6,216	4,944	4,729	4,549
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	12		83
Collectively evaluated for impairment	4,694		4,870
Total	4,706	4,917	4,953	5,061	4,878	5,022
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	496		122
Total	496	151	122	81	56	43
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	85		321
Total	85	237	321	362	117	112
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	35		170
Collectively evaluated for impairment	1,293		1,056
Total	1,328	1,504	1,226	1,201	1,297	1,255
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	109		144
Collectively evaluated for impairment	474		720
Total	583	789	864	821	835	961
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	404		479
Total	404	470	479	547	558	536
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	1,049		460
Total	$ 1,049	$ 642	$ 460	$ 604	$ 623	$ 253