Loans and Allowance for Credit Losses - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred origination fees	$ 8,200,000		$ 8,600,000
Accrued interest on loans	8,400,000		7,400,000
PPP loans	1,793,602,000		1,772,227,000
Nonaccrual loans	5,260,000		6,069,000
Interest on nonaccrual loans reversed through interest income	0	$ 0
Interest earned on nonaccrual loans	202,000	179,000
Total modifications	5,661,000	$ 0
Modified outstanding commitments	0
Net of government guarantees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	5,260,000		5,002,000
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	2,884,000		3,655,000
Total modifications	5,661,000
Commercial & industrial loans | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP loans	$ 1,900,000		$ 2,800,000