Loans and Leases - Aging Analysis of Loan and Lease Portfolio, Net of Unearned Income by Time Past Due (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans and Leases [Abstract]
Loans and leases, net	$ 3,616,871	$ 3,648,945
90+ Days Past Due	3,266	0
Nonaccrual	730	750
Non-accrual with no ACL	730	750
Commercial [Member]
Loans and Leases [Abstract]
Loans and leases, net	1,496,495	1,472,583
90+ Days Past Due	0	0
Nonaccrual	730	750
Non-accrual with no ACL	730	750
Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	689,981	705,668
90+ Days Past Due	3,266	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
Residential and Home Equity [Member]
Loans and Leases [Abstract]
Loans and leases, net	403,777	405,080
90+ Days Past Due	0	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
Construction [Member]
Loans and Leases [Abstract]
Loans and leases, net	132,487	128,179
90+ Days Past Due	0	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
Real Estate [Member]
Loans and Leases [Abstract]
Loans and leases, net	2,722,740	2,711,510
90+ Days Past Due	3,266	0
Nonaccrual	730	750
Non-accrual with no ACL	730	750
Commercial & Industrial [Member]
Loans and Leases [Abstract]
Loans and leases, net	462,196	497,700
90+ Days Past Due	0	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	261,279	264,117
90+ Days Past Due	0	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
Commercial Leases [Member]
Loans and Leases [Abstract]
Loans and leases, net	166,016	170,947
90+ Days Past Due	0	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
Consumer and Other [Member]
Loans and Leases [Abstract]
Loans and leases, net	4,640	4,671
90+ Days Past Due	0	0
Nonaccrual	0	0
Non-accrual with no ACL	0	0
30-89 Days Past Due [Member]
Loans and Leases [Abstract]
Loans and leases, net	10	8,912
30-89 Days Past Due [Member] | Commercial [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	7,248
30-89 Days Past Due [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
30-89 Days Past Due [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
30-89 Days Past Due [Member] | Construction [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
30-89 Days Past Due [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	7,248
30-89 Days Past Due [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
30-89 Days Past Due [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
30-89 Days Past Due [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	1,659
30-89 Days Past Due [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Loans and leases, net	10	5
Total Past Due and Nonaccrual [Member]
Loans and Leases [Abstract]
Loans and leases, net	4,006	9,662
Total Past Due and Nonaccrual [Member] | Commercial [Member]
Loans and Leases [Abstract]
Loans and leases, net	730	7,998
Total Past Due and Nonaccrual [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	3,266	0
Total Past Due and Nonaccrual [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
Total Past Due and Nonaccrual [Member] | Construction [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
Total Past Due and Nonaccrual [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Loans and leases, net	3,996	7,998
Total Past Due and Nonaccrual [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
Total Past Due and Nonaccrual [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	0
Total Past Due and Nonaccrual [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Loans and leases, net	0	1,659
Total Past Due and Nonaccrual [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Loans and leases, net	10	5
Current [Member]
Loans and Leases [Abstract]
Loans and leases, net	3,612,865	3,639,283
Current [Member] | Commercial [Member]
Loans and Leases [Abstract]
Loans and leases, net	1,495,765	1,464,585
Current [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	686,715	705,668
Current [Member] | Residential and Home Equity [Member]
Loans and Leases [Abstract]
Loans and leases, net	403,777	405,080
Current [Member] | Construction [Member]
Loans and Leases [Abstract]
Loans and leases, net	132,487	128,179
Current [Member] | Real Estate [Member]
Loans and Leases [Abstract]
Loans and leases, net	2,718,744	2,703,512
Current [Member] | Commercial & Industrial [Member]
Loans and Leases [Abstract]
Loans and leases, net	462,196	497,700
Current [Member] | Agricultural [Member]
Loans and Leases [Abstract]
Loans and leases, net	261,279	264,117
Current [Member] | Commercial Leases [Member]
Loans and Leases [Abstract]
Loans and leases, net	166,016	169,288
Current [Member] | Consumer and Other [Member]
Loans and Leases [Abstract]
Loans and leases, net	$ 4,630	$ 4,666