Loans and Allowance for Credit Losses - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred origination fees	$ 8,300,000		$ 8,300,000		$ 8,600,000
Accrued interest on loans	8,700,000		8,700,000		7,400,000
PPP loans	1,858,213,000		1,858,213,000		1,772,227,000
Nonaccrual loans	4,830,000		4,830,000		6,069,000
Interest on nonaccrual loans reversed through interest income	0	$ 0	0	$ 0
Interest earned on nonaccrual loans	32,000	205,000	234,000	384,000
Total modifications	0	4,456,000	5,661,000	4,456,000
Modified outstanding commitments	0		0
Net of government guarantees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	4,830,000		4,830,000		5,002,000
Commercial & industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	2,516,000		2,516,000		3,655,000
Total modifications	0	$ 4,456,000	5,661,000	$ 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	$ 1,600,000		$ 1,600,000		$ 2,800,000