Loans - Aging Analysis of Past Due Loan Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans [Abstract]
Total past due	$ 2,395,028	$ 2,350,622
Total past due and non-accrual	40,350	26,602
Total past due and still accruing	2,354,678	2,324,020
30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	4,266	6,070
Total past due and non-accrual	652	396
Total past due and still accruing	3,614	5,674
60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	5,111	4,373
Total past due and non-accrual	30	778
Total past due and still accruing	5,081	3,595
90 Days Or Greater [Member]
Loans [Abstract]
Total past due	30,032	22,680
Total past due and non-accrual	29,375	22,451
Total past due and still accruing	657	229
Total Past Due [Member]
Loans [Abstract]
Total past due	39,409	33,123
Total past due and non-accrual	30,057	23,625
Total past due and still accruing	9,352	9,498
Current [Member]
Loans [Abstract]
Total past due	2,355,619	2,317,499
Total past due and non-accrual	10,293	2,977
Total past due and still accruing	2,345,326	2,314,522
Home Equity [Member]
Loans [Abstract]
Total past due	52,238	52,308
Commercial [Member]
Loans [Abstract]
Total past due	1,267,682	1,218,514
Construction [Member]
Loans [Abstract]
Total past due	93,241	93,965
Real Estate Loans [Member] \| Mortgages [Member]
Loans [Abstract]
Total past due	285,390	288,664
Real Estate Loans [Member] \| Mortgages [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	1,645	2,737
Real Estate Loans [Member] \| Mortgages [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	30	1,073
Real Estate Loans [Member] \| Mortgages [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	1,340	1,675
Real Estate Loans [Member] \| Mortgages [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	3,015	5,485
Real Estate Loans [Member] \| Mortgages [Member] \| Current [Member]
Loans [Abstract]
Total past due	282,375	283,179
Real Estate Loans [Member] \| Home Equity [Member]
Loans [Abstract]
Total past due	52,238	52,308
Real Estate Loans [Member] \| Home Equity [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	209	146
Real Estate Loans [Member] \| Home Equity [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	7	17
Real Estate Loans [Member] \| Home Equity [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	562	181
Real Estate Loans [Member] \| Home Equity [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	778	344
Real Estate Loans [Member] \| Home Equity [Member] \| Current [Member]
Loans [Abstract]
Total past due	51,460	51,964
Real Estate Loans [Member] \| Commercial [Member]
Loans [Abstract]
Total past due	1,267,682	1,218,514
Real Estate Loans [Member] \| Commercial [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	843	1,733
Real Estate Loans [Member] \| Commercial [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	4,511	2,695
Real Estate Loans [Member] \| Commercial [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	21,479	9,871
Real Estate Loans [Member] \| Commercial [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	26,833	14,299
Real Estate Loans [Member] \| Commercial [Member] \| Current [Member]
Loans [Abstract]
Total past due	1,240,849	1,204,215
Real Estate Loans [Member] \| Agricultural [Member]
Loans [Abstract]
Total past due	357,643	347,448
Real Estate Loans [Member] \| Agricultural [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	910	1,020
Real Estate Loans [Member] \| Agricultural [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	349	158
Real Estate Loans [Member] \| Agricultural [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	1,927	1,982
Real Estate Loans [Member] \| Agricultural [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	3,186	3,160
Real Estate Loans [Member] \| Agricultural [Member] \| Current [Member]
Loans [Abstract]
Total past due	354,457	344,288
Real Estate Loans [Member] \| Construction [Member]
Loans [Abstract]
Total past due	93,241	93,965
Real Estate Loans [Member] \| Construction [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	0	0
Real Estate Loans [Member] \| Construction [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	0	233
Real Estate Loans [Member] \| Construction [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	1,227	283
Real Estate Loans [Member] \| Construction [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	1,227	516
Real Estate Loans [Member] \| Construction [Member] \| Current [Member]
Loans [Abstract]
Total past due	92,014	93,449
Consumer [Member]
Loans [Abstract]
Total past due	39,623	88,210
Consumer [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	41	161
Consumer [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	206	148
Consumer [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	1,013	785
Consumer [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	1,260	1,094
Consumer [Member] \| Current [Member]
Loans [Abstract]
Total past due	38,363	87,116
Other Commercial Loans [Member]
Loans [Abstract]
Total past due	180,997	179,166
Other Commercial Loans [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	366	256
Other Commercial Loans [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	8	49
Other Commercial Loans [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	1,851	7,500
Other Commercial Loans [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	2,225	7,805
Other Commercial Loans [Member] \| Current [Member]
Loans [Abstract]
Total past due	178,772	171,361
Other Agricultural Loans [Member]
Loans [Abstract]
Total past due	29,746	30,247
Other Agricultural Loans [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	252	17
Other Agricultural Loans [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	0	0
Other Agricultural Loans [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	633	403
Other Agricultural Loans [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	885	420
Other Agricultural Loans [Member] \| Current [Member]
Loans [Abstract]
Total past due	28,861	29,827
State and Political Subdivision Loans [Member]
Loans [Abstract]
Total past due	88,468	52,100
State and Political Subdivision Loans [Member] \| 30 to 59 Days Past Due [Member]
Loans [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] \| 60 to 89 Days Past Due [Member]
Loans [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] \| 90 Days Or Greater [Member]
Loans [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] \| Total Past Due [Member]
Loans [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] \| Current [Member]
Loans [Abstract]
Total past due	$ 88,468	$ 52,100