Loans and Allowance for Credit Losses - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) loan	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) loan	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred origination fees	$ 7,900,000		$ 7,900,000		$ 8,600,000
Accrued interest on loans	6,700,000		6,700,000		5,500,000
PPP loans	1,643,594,000		1,643,594,000		1,487,947,000
Nonaccrual loans	7,723,000		7,723,000		7,076,000
Interest on nonaccrual loans reversed through interest income	0	$ 0	0	$ 2,000
Interest earned on nonaccrual loans	205,000	$ 873,000	384,000	$ 930,000
Financing receivable, modified	4,456,000		4,456,000		5,100,000
Modified outstanding commitments	0		0
Modified, subsequent default loans	0
Total Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables, modified after twelve months	$ 0		$ 0
COVID-19 Loan Modifications
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modified					$ 999,000
Number of modifications | loan	0		0		1
Net of government guarantees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 5,349,000		$ 5,349,000		$ 6,430,000
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	5,236,000		5,236,000		3,294,000
Financing receivable, modified	4,456,000		4,456,000
Commercial & industrial loans | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
PPP loans	$ 3,600,000		$ 3,600,000		$ 7,100,000