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Loans and Asset Quality - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan origination fees	$ 1,400,000		$ 1,400,000
Accrued interest	5,800,000		6,800,000
Allowance for credit losses	20,628,000	$ 19,176,000	21,336,000	$ 20,906,000	$ 17,951,000
Loans charge-off	0	0
TDRs that subsequently defaulted	0	0
Troubled debt restructure
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	101,000	$ 14,000
Unfunded commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	0		442,000	$ 442,000
Other commitments	377,600,000		372,000,000
Standby letters of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Other commitments	$ 14,600,000		$ 15,400,000

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Amount of unamortized loan commitment, origination, and other costs (fees) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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