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Loans and Leases - Nonaccrual Loans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	$ 40,373,000		$ 40,373,000		$ 42,038,000
Nonaccrual Loans and Leases	62,381,000		62,381,000		62,165,000
Loans and Leases Past Due Over 89 Days and Accruing	193,000		193,000		101,000
Interest on nonaccrual loans	0	$ 0	0	$ 0
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	2,223,000		2,223,000		2,273,000
Loans and Leases Past Due Over 89 Days and Accruing	0		0		0
Commercial and Industrial | Commercial and industrial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	2,223,000		2,223,000		2,253,000
Loans and Leases Past Due Over 89 Days and Accruing	0		0		0
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	40,373,000		40,373,000		42,038,000
Nonaccrual Loans and Leases	43,993,000		43,993,000		44,450,000
Loans and Leases Past Due Over 89 Days and Accruing	0		0		0
Commercial Real Estate | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	132,000		132,000		170,000
Loans and Leases Past Due Over 89 Days and Accruing	0		0		0
Commercial Real Estate | Commercial and industrial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	40,373,000		40,373,000		42,038,000
Nonaccrual Loans and Leases	43,861,000		43,861,000		44,280,000
Loans and Leases Past Due Over 89 Days and Accruing	0		0		0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	16,013,000		16,013,000		15,172,000
Loans and Leases Past Due Over 89 Days and Accruing	5,000		5,000		0
Residential real estate | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	2,992,000		2,992,000		3,230,000
Loans and Leases Past Due Over 89 Days and Accruing	0		0		0
Residential real estate | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	13,021,000		13,021,000		11,942,000
Loans and Leases Past Due Over 89 Days and Accruing	5,000		5,000		0
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	152,000		152,000		270,000
Loans and Leases Past Due Over 89 Days and Accruing	188,000		188,000		101,000
Consumer and other | Commercial and industrial other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	136,000		136,000		230,000
Loans and Leases Past Due Over 89 Days and Accruing	188,000		188,000		101,000
Consumer and other | Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans and Leases with no ACL	0		0		0
Nonaccrual Loans and Leases	16,000		16,000		40,000
Loans and Leases Past Due Over 89 Days and Accruing	$ 0		$ 0		$ 0

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