Loans and Leases - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Loans and Leases [Abstract]
Balance at beginning of period	$ 75,423	$ 75,018	$ 75,283	$ 74,965	$ 74,965
Balance at beginning of period	2,690	3,690	2,690	3,690	3,690
Balance at beginning of period	78,113	78,708	77,973	78,655	78,655
Provision for credit losses	1,290	0	1,590	0
Provision for credit losses	110	0	110	0
Provision for credit losses	1,400	0	1,700	0
Charge-offs	(569)	(16)	(842)	(26)	(858)
Charge-offs	0	0	0	0
Charge-offs	(569)	(16)	(842)	(26)
Recoveries	25	30	138	93
Recoveries	0	0	0	0
Recoveries	25	30	138	93
Net (charge-offs)/recoveries	(544)	14	(704)	67
Net (charge-offs)/recoveries	0	0	0	0
Net (charge-offs)/recoveries	(544)	14	(704)	67
Balance at end of period	76,169	75,032	76,169	75,032	75,283
Balance at end of period	2,800	3,690	2,800	3,690	2,690
Balance at end of period	78,969	78,722	78,969	78,722	77,973
Commercial [Member]
Loans and Leases [Abstract]
Balance at beginning of period	20,313	22,414	20,382	26,093	26,093
Provision for credit losses	808	194	739	(3,485)
Charge-offs	(175)	0	(175)	0	0
Recoveries	0	0	0	0
Balance at end of period	20,946	22,608	20,946	22,608	20,382
Agricultural [Member]
Loans and Leases [Abstract]
Balance at beginning of period	24,077	11,377	23,615	7,744	7,744
Provision for credit losses	572	5,109	1,034	8,742
Charge-offs	(180)	0	(180)	0	0
Recoveries	0	0	0	0
Balance at end of period	24,469	16,486	24,469	16,486	23,615
Residential & Home Equity [Member]
Loans and Leases [Abstract]
Balance at beginning of period	7,479	7,721	7,340	7,770	7,770
Provision for credit losses	118	(144)	253	(201)
Charge-offs	0	0	0	0	(29)
Recoveries	2	7	6	15
Balance at end of period	7,599	7,584	7,599	7,584	7,340
Construction [Member]
Loans and Leases [Abstract]
Balance at beginning of period	2,648	4,616	3,055	4,432	4,432
Provision for credit losses	118	(2,451)	(289)	(2,267)
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Balance at end of period	2,766	2,165	2,766	2,165	3,055
Real Estate [Member]
Loans and Leases [Abstract]
Balance at beginning of period	54,517	46,128	54,392	46,039	46,039
Provision for credit losses	1,616	2,708	1,737	2,789
Charge-offs	(355)	0	(355)	0
Recoveries	2	7	6	15
Balance at end of period	55,780	48,843	55,780	48,843	54,392
Commercial & Industrial [Member]
Loans and Leases [Abstract]
Balance at beginning of period	7,843	11,559	7,791	13,380	13,380
Provision for credit losses	(534)	(606)	(356)	(2,444)
Charge-offs	0	0	(232)	0	(736)
Recoveries	17	19	123	36
Balance at end of period	7,326	10,972	7,326	10,972	7,791
Agricultural [Member]
Loans and Leases [Abstract]
Balance at beginning of period	6,417	10,292	6,725	8,872	8,872
Provision for credit losses	765	(3,385)	491	(1,966)
Charge-offs	(200)	0	(234)	0	0
Recoveries	0	1	0	2
Balance at end of period	6,982	6,908	6,982	6,908	6,725
Commercial Leases [Member]
Loans and Leases [Abstract]
Balance at beginning of period	6,429	6,923	6,153	6,537	6,537
Provision for credit losses	(571)	674	(295)	1,060
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Balance at end of period	5,858	7,597	5,858	7,597	6,153
Consumer and Other [Member]
Loans and Leases [Abstract]
Balance at beginning of period	217	116	222	137	137
Provision for credit losses	14	609	13	561
Charge-offs	(14)	(16)	(21)	(26)	(93)
Recoveries	6	3	9	40
Balance at end of period	$ 223	$ 712	$ 223	$ 712	$ 222