Loans and Allowance for Credit Losses - Loans by Type as Percentage of Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 1,210,583	$ 1,189,782
Allowance for loan losses (Note 3)	$ 15,065	$ 7,619	$ 7,601	$ 7,688
Percentage of allowance for credit losses	1.24%	0.64%
Loans, net	$ 1,195,518	$ 1,182,163
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 55,995	$ 64,159
Percentage of loans	4.63%	5.39%
Percentage of increase decrease of loans	(12.72%)
Allowance for loan losses (Note 3)	$ 135	$ 144	387	448
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 217,063	$ 210,210
Percentage of loans	17.93%	17.67%
Percentage of increase decrease of loans	3.26%
Allowance for loan losses (Note 3)	$ 3,020	$ 1,361	1,752	1,454
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 648,202	$ 630,953
Percentage of loans	53.54%	53.03%
Percentage of increase decrease of loans	2.73%
Allowance for loan losses (Note 3)	$ 7,837	$ 4,822	3,690	3,705
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 38,891	$ 39,808
Percentage of loans	3.21%	3.35%
Percentage of increase decrease of loans	2.30%
Allowance for loan losses (Note 3)	$ 913	$ 310	304	290
Construction Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 13,939	$ 14,736
Percentage of loans	1.15%	1.24%
Percentage of increase decrease of loans	(5.41%)
Allowance for loan losses (Note 3)	$ 73	$ 63	37	110
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans (Note 3)	$ 236,493	$ 229,916
Percentage of loans	19.54%	19.32%
Percentage of increase decrease of loans	2.86%
Allowance for loan losses (Note 3)	$ 3,087	$ 906	$ 589	$ 671

Percentage of allowance for credit losses.

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- Definition

Percentage of increase decrease of loans and leases receivable.

+ References

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Percentage of loan s and leases receivable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

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-SubTopic 10
-Section 50
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7)
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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