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Loans and Allowance for Credit Losses - Schedule of Collateral-Dependent Non-Accrual Loans (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 2,432,000	$ 8,376,000
Allowance for credit losses on loans	$ 22,983,000	$ 23,023,000	$ 22,874,000	$ 22,113,000
Weighted average ratio of loans value to collateral dependent loans value	42.00%	67.00%
Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 2,432,000	$ 8,376,000
Allowance for credit losses on loans	0	0
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,563,000	7,963,000
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	778,000	413,000
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	91,000	0
Commercial real estate | Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,563,000	7,269,000
Allowance for credit losses on loans	2,487,000	2,776,000	2,778,000	3,135,000
Commercial real estate | Commercial owner-occupied | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,563,000	7,269,000
Allowance for credit losses on loans	0	0
Commercial real estate | Commercial owner-occupied | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,563,000	7,269,000
Commercial real estate | Commercial owner-occupied | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0	0
Commercial real estate | Commercial owner-occupied | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0	0
Commercial real estate | Commercial investor-owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0	694,000
Allowance for credit losses on loans	12,676,000	12,739,000	12,682,000	11,624,000
Commercial real estate | Commercial investor-owned | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans		694,000
Allowance for credit losses on loans		0
Commercial real estate | Commercial investor-owned | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans		694,000
Commercial real estate | Commercial investor-owned | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans		0
Commercial real estate | Commercial investor-owned | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans		0
Commercial real estate | Installment and other consumer loans | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	91,000
Allowance for credit losses on loans	0
Commercial real estate | Installment and other consumer loans | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0
Commercial real estate | Installment and other consumer loans | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0
Commercial real estate | Installment and other consumer loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	91,000
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	778,000	413,000
Allowance for credit losses on loans	558,000	595,000	738,000	1,038,000
Residential loans | Home equity | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	778,000	413,000
Allowance for credit losses on loans	0	0
Residential loans | Home equity | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0	0
Residential loans | Home equity | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	778,000	413,000
Residential loans | Home equity | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0	0
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	0	0
Allowance for credit losses on loans	595,000	644,000	$ 998,000	$ 1,260,000
Residential loans | Other residential | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual collateral dependent loans in process of foreclosure	$ 0	$ 0

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
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