Loans, Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 17,570	$ 16,931	$ 17,304	$ 15,815
Charge-offs	(13)	(7)	(464)	(149)
Recoveries	9	10	26	118
Provision	725	400	1,425	1,550
Balance at end of period	18,291	17,334	18,291	17,334
Individually evaluated for impairment	107	269	107	269	$ 121
Collectively evaluated for impairment	18,184	17,065	18,184	17,065	17,183
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,015	1,174	1,147	1,174
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(10)	16	(142)	16
Balance at end of period	1,005	1,190	1,005	1,190
Individually evaluated for impairment	6	16	6	16	12
Collectively evaluated for impairment	999	1,174	999	1,174	1,135
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	9,216	7,106	8,099	6,216
Charge-offs	0	0	0	0
Recoveries	0	0	0	89
Provision	721	572	1,838	1,373
Balance at end of period	9,937	7,678	9,937	7,678
Individually evaluated for impairment	60	97	60	97	61
Collectively evaluated for impairment	9,877	7,581	9,877	7,581	8,038
Real Estate Loans [Member] | Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	4,484	4,706	4,729	4,953
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	54	40	(191)	(207)
Balance at end of period	4,538	4,746	4,538	4,746
Individually evaluated for impairment	24	12	24	12	14
Collectively evaluated for impairment	4,514	4,734	4,514	4,734	4,715
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	563	496	434	122
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	115	42	244	416
Balance at end of period	678	538	678	538
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	678	538	678	538	434
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	464	85	262	321
Charge-offs	(13)	(7)	(30)	(16)
Recoveries	5	4	15	16
Provision	(224)	236	(15)	(3)
Balance at end of period	232	318	232	318
Individually evaluated for impairment	4	0	4	0	0
Collectively evaluated for impairment	228	318	228	318	262
Other Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,173	1,328	1,023	1,226
Charge-offs	0	0	(434)	(133)
Recoveries	4	6	11	13
Provision	(784)	(203)	(207)	25
Balance at end of period	393	1,131	393	1,131
Individually evaluated for impairment	13	35	13	35	34
Collectively evaluated for impairment	380	1,096	380	1,096	989
Other Agricultural Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	446	583	558	864
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	913	(135)	801	(416)
Balance at end of period	1,359	448	1,359	448
Individually evaluated for impairment	0	109	0	109	0
Collectively evaluated for impairment	1,359	339	1,359	339	558
State and Political Subdivision Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	323	404	281	479
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	2	(108)	44	(183)
Balance at end of period	325	296	325	296
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	325	296	325	296	281
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	(114)	1,049	771	460
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(62)	(60)	(947)	529
Balance at end of period	(176)	989	(176)	989
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	$ (176)	$ 989	$ (176)	$ 989	$ 771