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Financial Instruments - Summary of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities at fair value	$ 8,699	$ 8,566
Securities available for sale	535,348	529,749
Noninterest-bearing deposits	554,699	599,579
Interest-bearing deposits	1,513,429	1,518,424
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	55,189	43,943
Equity securities at fair value	8,699	8,566
Securities available for sale	535,348	529,749
Securities held to maturity	422,876	425,906
Reserve Bank stock	10,259	8,581
Loans held for sale	3,603	4,834
Loans to other financial institutions	0	0
Loans, net	1,195,518	1,182,163
Accrued interest receivable	9,652	8,949
Interest rate lock commitments	87	28
Mortgage Loan Servicing Rights	4,165	4,322
Interest rate derivative contracts	2,244	9,204
Noninterest-bearing deposits	554,699	599,579
Interest-bearing deposits	1,513,429	1,518,424
Brokered deposits	37,773
Borrowings	85,000	50,000
Subordinated debentures	35,323	35,262
Accrued interest payable	438	610
Interest rate derivative contracts	3,790	5,823
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	55,189	43,943
Equity securities at fair value	8,699	8,566
Securities available for sale	535,348	529,749
Securities held to maturity	358,373	353,901
Reserve Bank stock	10,259	8,581
Loans held for sale	3,711	4,979
Loans to other financial institutions	0	0
Loans, net	1,151,264	1,123,198
Accrued interest receivable	9,652	8,949
Interest rate lock commitments	87	28
Mortgage Loan Servicing Rights	5,623	5,855
Interest rate derivative contracts	2,244	9,204
Noninterest-bearing deposits	554,699	599,579
Interest-bearing deposits	1,510,549	1,514,294
Brokered deposits	37,698
Borrowings	85,000	50,000
Subordinated debentures	30,883	30,304
Accrued interest payable	438	610
Interest rate derivative contracts	3,790	5,823
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	55,189	43,943
Equity securities at fair value	6,062	6,024
Securities available for sale	79,975	78,204
Securities held to maturity	0	0
Reserve Bank stock	0	0
Loans held for sale	0	0
Loans to other financial institutions	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Interest rate lock commitments	0	0
Mortgage Loan Servicing Rights	0	0
Interest rate derivative contracts	0	0
Noninterest-bearing deposits	554,699	599,579
Interest-bearing deposits	0	0
Brokered deposits	0
Borrowings	0	0
Subordinated debentures	0	0
Accrued interest payable	0	0
Interest rate derivative contracts	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Equity securities at fair value	0	0
Securities available for sale	455,373	451,545
Securities held to maturity	342,946	338,583
Reserve Bank stock	10,259	8,581
Loans held for sale	3,711	4,979
Loans to other financial institutions	0	0
Loans, net	0	0
Accrued interest receivable	9,652	8,949
Interest rate lock commitments	87	28
Mortgage Loan Servicing Rights	5,623	5,855
Interest rate derivative contracts	2,244	9,204
Noninterest-bearing deposits	0	0
Interest-bearing deposits	1,510,549	1,514,294
Brokered deposits	37,698
Borrowings	85,000	50,000
Subordinated debentures	30,883	30,304
Accrued interest payable	438	610
Interest rate derivative contracts	3,790	5,823
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Equity securities at fair value	2,637	2,542
Securities available for sale	0	0
Securities held to maturity	15,427	15,318
Reserve Bank stock	0	0
Loans held for sale	0	0
Loans to other financial institutions	0	0
Loans, net	1,151,264	1,123,198
Accrued interest receivable	0	0
Interest rate lock commitments	0	0
Mortgage Loan Servicing Rights	0	0
Interest rate derivative contracts	0	0
Noninterest-bearing deposits	0	0
Interest-bearing deposits	0	0
Brokered deposits	0
Borrowings	0	0
Subordinated debentures	0	0
Accrued interest payable	0	0
Interest rate derivative contracts	$ 0	$ 0

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