Loans and Leases - Amortized Cost of Loans to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025		Sep. 30, 2025
Loans and Leases [Abstract]
Amortized cost		$ 2,029	[1]	$ 4,744	[2]
Percentage of total loan segment		0.06%		0.13%
Commercial [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0	[1]	$ 0	[2]
Percentage of total loan segment		0.00%		0.00%
Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0	[1]	$ 2,639	[2]
Percentage of total loan segment		0.00%		0.37%
Residential and Home Equity [Member]
Loans and Leases [Abstract]
Amortized cost		$ 56	[1]	$ 89	[2]
Percentage of total loan segment		0.01%		0.02%
Construction [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0	[1]	$ 0	[2]
Percentage of total loan segment		0.00%		0.00%
Real Estate [Member]
Loans and Leases [Abstract]
Amortized cost		$ 56	[1]	$ 2,728	[2]
Percentage of total loan segment		0.00%		0.10%
Commercial & Industrial [Member]
Loans and Leases [Abstract]
Amortized cost		$ 1,973	[1]	$ 1,973	[2]
Percentage of total loan segment		0.40%		0.40%
Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0	[1]	$ 43	[2]
Percentage of total loan segment		0.00%		0.02%
Commercial Leases [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0	[1]	$ 0	[2]
Percentage of total loan segment		0.00%		0.00%
Consumer and Other [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0	[1]	$ 0	[2]
Percentage of total loan segment		0.00%		0.00%
Interest Rate Reduction [Member]
Loans and Leases [Abstract]
Amortized cost		$ 0		$ 0
Interest Rate Reduction [Member] | Commercial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Construction [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Interest Rate Reduction [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Maturity or Term Extension [Member]
Loans and Leases [Abstract]
Amortized cost		2,029		3,088
Maturity or Term Extension [Member] | Commercial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Maturity or Term Extension [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		983
Maturity or Term Extension [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Amortized cost		56		89
Maturity or Term Extension [Member] | Construction [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Maturity or Term Extension [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Amortized cost		56		1,072
Maturity or Term Extension [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Amortized cost		1,973		1,973
Maturity or Term Extension [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		43
Maturity or Term Extension [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Maturity or Term Extension [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Commercial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Construction [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Principal Forgiveness [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member]
Loans and Leases [Abstract]
Amortized cost		0		1,656
Payment Deferral [Member] | Commercial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		1,656
Payment Deferral [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member] | Construction [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Amortized cost		0		1,656
Payment Deferral [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Payment Deferral [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Amortized cost		0		0
Multiple Modification Types [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Commercial [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Construction [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	0		0
Multiple Modification Types [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Amortized cost	[3]	$ 0		$ 0

[1] Unfunded lending commitments related to loans modified to borrowers experiencing financial difficulty totaled $0 million during the three months ended September 30, 2025.

[2] Unfunded lending commitments related to loans modified to borrowers experiencing financial difficulty totaled $0 million during the nine months ended September 30, 2025.

[3] Includes modifications that resulted from a combination of interest rate reduction, maturity or term extension, principal forgiveness, and payment deferral modifications.