Loans, Credit Exposures by Internally Assigned Grades, by Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans	$ 2,315,663		$ 2,313,242
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
Gross charge-offs	185	$ 674
Commercial Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	18,984		52,207
2024/2023	52,829		86,332
2023/2022	87,215		384,368
2022/2021	382,598		205,586
2021/2020	194,145		116,840
Prior	348,832		243,887
Revolving Loans Amortized Cost Basis	30,527		30,028
Revolving Loans Converted to Term	2,110		2,187
Total loans	1,117,240		1,121,435
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	40		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	40		0
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	18,984		52,122
2024/2023	52,745		84,465
2023/2022	85,354		360,989
2022/2021	358,282		200,869
2021/2020	187,214		114,839
Prior	326,128		223,601
Revolving Loans Amortized Cost Basis	28,693		28,178
Revolving Loans Converted to Term	1,755		1,786
Total loans	1,059,155		1,066,849
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		810
2023/2022	807		3,495
2022/2021	630		1,874
2021/2020	1,865		1,372
Prior	9,029		8,501
Revolving Loans Amortized Cost Basis	1,678		1,674
Revolving Loans Converted to Term	0		0
Total loans	14,009		17,726
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		85
2024/2023	84		1,057
2023/2022	1,054		19,884
2022/2021	23,686		2,843
2021/2020	5,066		629
Prior	13,675		11,785
Revolving Loans Amortized Cost Basis	156		176
Revolving Loans Converted to Term	355		401
Total loans	44,076		36,860
Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
Agricultural Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	12,645		35,837
2024/2023	33,660		25,650
2023/2022	24,978		55,932
2022/2021	54,837		27,382
2021/2020	26,645		29,770
Prior	160,681		135,795
Revolving Loans Amortized Cost Basis	16,222		17,128
Revolving Loans Converted to Term	317		228
Total loans	329,985		327,722
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		0
Agricultural Real Estate [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	12,645		32,199
2024/2023	30,143		22,372
2023/2022	21,769		46,644
2022/2021	45,766		26,132
2021/2020	25,417		29,770
Prior	150,303		126,876
Revolving Loans Amortized Cost Basis	13,297		14,351
Revolving Loans Converted to Term	206		115
Total loans	299,546		298,459
Agricultural Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		2,930
2024/2023	2,813		3,138
2023/2022	3,070		7,109
2022/2021	6,904		0
2021/2020	0		0
Prior	5,364		5,315
Revolving Loans Amortized Cost Basis	2,326		2,248
Revolving Loans Converted to Term	0		0
Total loans	20,477		20,740
Agricultural Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		708
2024/2023	704		140
2023/2022	139		2,179
2022/2021	2,167		1,250
2021/2020	1,228		0
Prior	5,014		3,604
Revolving Loans Amortized Cost Basis	599		529
Revolving Loans Converted to Term	111		113
Total loans	9,962		8,523
Agricultural Real Estate [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
Construction [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	3,387		48,026
2024/2023	53,069		56,916
2023/2022	54,773		54,796
2022/2021	49,970		3,233
2021/2020	3,231		0
Prior	0		0
Revolving Loans Amortized Cost Basis	4,466		1,355
Revolving Loans Converted to Term	0		0
Total loans	168,896		164,326
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0		0
Construction [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	3,387		48,026
2024/2023	53,069		56,916
2023/2022	53,984		34,995
2022/2021	44,312		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	4,466		1,355
Revolving Loans Converted to Term	0		0
Total loans	159,218		141,292
Construction [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		19,391
2022/2021	4,539		2,950
2021/2020	2,948		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	7,487		22,341
Construction [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	789		410
2022/2021	1,119		283
2021/2020	283		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	2,191		693
Construction [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
Other Commercial Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	2,372		33,444
2024/2023	31,978		22,808
2023/2022	21,766		8,766
2022/2021	12,496		7,720
2021/2020	7,444		2,446
Prior	6,014		4,161
Revolving Loans Amortized Cost Basis	53,490		50,181
Revolving Loans Converted to Term	1,969		1,784
Total loans	137,529		131,310
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023	0		0
2023/2022	48		0
2022/2021	0		59
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	75		2,502
Revolving Loans Converted to Term	0		0
Gross charge-offs	123	644	2,561
Other Commercial Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	2,372		33,211
2024/2023	31,799		22,808
2023/2022	21,766		6,773
2022/2021	6,371		7,542
2021/2020	7,245		2,150
Prior	5,083		3,464
Revolving Loans Amortized Cost Basis	52,207		44,871
Revolving Loans Converted to Term	72		75
Total loans	126,915		120,894
Other Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		20
2024/2023	179		0
2023/2022	0		1,798
2022/2021	5,929		178
2021/2020	159		62
Prior	93		56
Revolving Loans Amortized Cost Basis	579		4,888
Revolving Loans Converted to Term	32		32
Total loans	6,971		7,034
Other Commercial Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		213
2024/2023	0		0
2023/2022	0		195
2022/2021	196		0
2021/2020	40		234
Prior	838		641
Revolving Loans Amortized Cost Basis	512		422
Revolving Loans Converted to Term	1,852		1,661
Total loans	3,438		3,366
Other Commercial Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	192		0
Revolving Loans Converted to Term	13		16
Total loans	205		16
Other Agricultural Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	4,668		5,917
2024/2023	5,632		2,362
2023/2022	2,152		1,343
2022/2021	1,210		3,879
2021/2020	3,305		407
Prior	588		733
Revolving Loans Amortized Cost Basis	10,927		15,010
Revolving Loans Converted to Term	6		11
Total loans	28,488		29,662
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0	0	0
Other Agricultural Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	4,668		4,576
2024/2023	4,320		2,008
2023/2022	1,850		888
2022/2021	759		3,870
2021/2020	3,298		407
Prior	504		220
Revolving Loans Amortized Cost Basis	10,631		14,812
Revolving Loans Converted to Term	0		0
Total loans	26,030		26,781
Other Agricultural Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		1,341
2024/2023	1,312		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		400
Revolving Loans Amortized Cost Basis	65		67
Revolving Loans Converted to Term	0		0
Total loans	1,377		1,808
Other Agricultural Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		354
2023/2022	302		455
2022/2021	451		9
2021/2020	7		0
Prior	84		113
Revolving Loans Amortized Cost Basis	231		131
Revolving Loans Converted to Term	6		11
Total loans	1,081		1,073
Other Agricultural Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
State and Political Subdivision Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	60		0
2024/2023	0		1,442
2023/2022	1,425		13,460
2022/2021	13,430		10,522
2021/2020	10,378		5,319
Prior	28,068		23,439
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	53,361		54,182
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Gross charge-offs	0	$ 0	0
State and Political Subdivision Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	60		0
2024/2023	0		1,442
2023/2022	1,425		13,460
2022/2021	13,430		10,522
2021/2020	10,378		5,319
Prior	28,068		23,439
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	53,361		54,182
State and Political Subdivision Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
State and Political Subdivision Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
State and Political Subdivision Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	0		0
Total Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	42,116		175,431
2024/2023	177,168		195,510
2023/2022	192,309		518,665
2022/2021	514,541		258,322
2021/2020	245,148		154,782
Prior	544,183		408,015
Revolving Loans Amortized Cost Basis	115,632		113,702
Revolving Loans Converted to Term	4,402		4,210
Total loans	1,835,499		1,828,637
Total Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	42,116		170,134
2024/2023	172,076		190,011
2023/2022	186,148		463,749
2022/2021	468,920		248,935
2021/2020	233,552		152,485
Prior	510,086		377,600
Revolving Loans Amortized Cost Basis	109,294		103,567
Revolving Loans Converted to Term	2,033		1,976
Total loans	1,724,225		1,708,457
Total Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		4,291
2024/2023	4,304		3,948
2023/2022	3,877		31,793
2022/2021	18,002		5,002
2021/2020	4,972		1,434
Prior	14,486		14,272
Revolving Loans Amortized Cost Basis	4,648		8,877
Revolving Loans Converted to Term	32		32
Total loans	50,321		69,649
Total Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		1,006
2024/2023	788		1,551
2023/2022	2,284		23,123
2022/2021	27,619		4,385
2021/2020	6,624		863
Prior	19,611		16,143
Revolving Loans Amortized Cost Basis	1,498		1,258
Revolving Loans Converted to Term	2,324		2,186
Total loans	60,748		50,515
Total Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2025/2024	0		0
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	192		0
Revolving Loans Converted to Term	13		16
Total loans	$ 205		$ 16