Loans, Credit Exposures by Internally Assigned Grades, by Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans	$ 2,246,396		$ 2,246,396		$ 1,724,999
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
Gross charge-offs	808	$ 13	819	$ 464
Commercial Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	65,893		65,893
2022	342,657		342,657
2021	218,616		218,616
2020	125,342		125,342
2019	90,460		90,460
Prior	206,653		206,653
Revolving Loans Amortized Cost Basis	30,328		30,328
Revolving Loans Converted to Term	1,174		1,174
Total loans	1,081,123		1,081,123
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			0
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Revolving Loans Converted to Term			0
Gross charge-offs			0
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	65,893		65,893
2022	333,600		333,600
2021	215,198		215,198
2020	123,779		123,779
2019	82,640		82,640
Prior	195,576		195,576
Revolving Loans Amortized Cost Basis	29,476		29,476
Revolving Loans Converted to Term	1,166		1,166
Total loans	1,047,328		1,047,328
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	8,824		8,824
2021	3,412		3,412
2020	1,563		1,563
2019	7,659		7,659
Prior	9,391		9,391
Revolving Loans Amortized Cost Basis	123		123
Revolving Loans Converted to Term	0		0
Total loans	30,972		30,972
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	233		233
2021	6		6
2020	0		0
2019	161		161
Prior	1,686		1,686
Revolving Loans Amortized Cost Basis	729		729
Revolving Loans Converted to Term	8		8
Total loans	2,823		2,823
Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
2023	16,510		16,510
2022	56,221		56,221
2021	31,039		31,039
2020	32,559		32,559
2019	26,863		26,863
Prior	135,945		135,945
Revolving Loans Amortized Cost Basis	13,095		13,095
Revolving Loans Converted to Term	1,932		1,932
Total loans	314,164		314,164
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			0
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Revolving Loans Converted to Term			0
Gross charge-offs			0
Agricultural Real Estate [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	16,361		16,361
2022	54,306		54,306
2021	29,828		29,828
2020	32,559		32,559
2019	26,760		26,760
Prior	123,598		123,598
Revolving Loans Amortized Cost Basis	12,926		12,926
Revolving Loans Converted to Term	1,689		1,689
Total loans	298,027		298,027
Agricultural Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	149		149
2022	1,915		1,915
2021	1,211		1,211
2020	0		0
2019	0		0
Prior	6,702		6,702
Revolving Loans Amortized Cost Basis	94		94
Revolving Loans Converted to Term	0		0
Total loans	10,071		10,071
Agricultural Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	103		103
Prior	5,645		5,645
Revolving Loans Amortized Cost Basis	75		75
Revolving Loans Converted to Term	243		243
Total loans	6,066		6,066
Agricultural Real Estate [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
2023	39,265		39,265
2022	93,417		93,417
2021	42,253		42,253
2020	0		0
2019	0		0
Prior	385		385
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	175,320		175,320
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			0
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Revolving Loans Converted to Term			0
Gross charge-offs			0
Construction [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	37,135		37,135
2022	92,252		92,252
2021	35,486		35,486
2020	0		0
2019	0		0
Prior	385		385
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	165,258		165,258
Construction [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	2,130		2,130
2022	1,165		1,165
2021	4,410		4,410
2020	0		0
2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	7,705		7,705
Construction [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	2,357		2,357
2020	0		0
2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	2,357		2,357
Construction [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
Total loans	120,347		120,347		63,222
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			763
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Revolving Loans Converted to Term			0
Gross charge-offs	763	0	763	434
Other Commercial Loans [Member] | Construction [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	5,227		5,227
2022	12,238		12,238
2021	10,789		10,789
2020	5,703		5,703
2019	5,763		5,763
Prior	5,437		5,437
Revolving Loans Amortized Cost Basis	73,359		73,359
Revolving Loans Converted to Term	1,831		1,831
Total loans	120,347		120,347
Other Commercial Loans [Member] | Construction [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	5,227		5,227
2022	12,057		12,057
2021	9,234		9,234
2020	5,487		5,487
2019	5,291		5,291
Prior	4,213		4,213
Revolving Loans Amortized Cost Basis	71,633		71,633
Revolving Loans Converted to Term	99		99
Total loans	113,241		113,241
Other Commercial Loans [Member] | Construction [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	81		81
2021	1,555		1,555
2020	216		216
2019	286		286
Prior	22		22
Revolving Loans Amortized Cost Basis	1,214		1,214
Revolving Loans Converted to Term	1,708		1,708
Total loans	5,082		5,082
Other Commercial Loans [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	100		100
2021	0		0
2020	0		0
2019	186		186
Prior	1,202		1,202
Revolving Loans Amortized Cost Basis	294		294
Revolving Loans Converted to Term	0		0
Total loans	1,782		1,782
Other Commercial Loans [Member] | Construction [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	218		218
Revolving Loans Converted to Term	24		24
Total loans	242		242
Other Agricultural Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	3,464		3,464
2022	2,136		2,136
2021	7,228		7,228
2020	1,199		1,199
2019	680		680
Prior	828		828
Revolving Loans Amortized Cost Basis	11,079		11,079
Revolving Loans Converted to Term	34		34
Total loans	26,648		26,648		34,832
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			0
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Revolving Loans Converted to Term			0
Gross charge-offs	0	0	0	0
Other Agricultural Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	3,464		3,464
2022	1,645		1,645
2021	7,005		7,005
2020	1,154		1,154
2019	666		666
Prior	521		521
Revolving Loans Amortized Cost Basis	10,554		10,554
Revolving Loans Converted to Term	0		0
Total loans	25,009		25,009
Other Agricultural Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	491		491
2021	223		223
2020	45		45
2019	8		8
Prior	42		42
Revolving Loans Amortized Cost Basis	500		500
Revolving Loans Converted to Term	0		0
Total loans	1,309		1,309
Other Agricultural Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	6		6
Prior	265		265
Revolving Loans Amortized Cost Basis	25		25
Revolving Loans Converted to Term	34		34
Total loans	330		330
Other Agricultural Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
2023	1,426		1,426
2022	14,207		14,207
2021	10,984		10,984
2020	4,363		4,363
2019	2		2
Prior	25,678		25,678
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	56,660		56,660		$ 59,208
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2023			0
2022			0
2021			0
2020			0
2019			0
Prior			0
Revolving Loans Amortized Cost Basis			0
Revolving Loans Converted to Term			0
Gross charge-offs	0	$ 0	0	$ 0
State and Political Subdivision Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	1,426		1,426
2022	14,207		14,207
2021	10,984		10,984
2020	4,363		4,363
2019	2		2
Prior	25,678		25,678
Revolving Loans Amortized Cost Basis	0		0
Revolving Loans Converted to Term	0		0
Total loans	56,660		56,660
State and Political Subdivision Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	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]
2023	131,785		131,785
2022	520,876		520,876
2021	320,909		320,909
2020	169,166		169,166
2019	123,768		123,768
Prior	374,926		374,926
Revolving Loans Amortized Cost Basis	127,861		127,861
Revolving Loans Converted to Term	4,971		4,971
Total loans	1,774,262		1,774,262
Total Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	129,506		129,506
2022	508,067		508,067
2021	307,735		307,735
2020	167,342		167,342
2019	115,359		115,359
Prior	349,971		349,971
Revolving Loans Amortized Cost Basis	124,589		124,589
Revolving Loans Converted to Term	2,954		2,954
Total loans	1,705,523		1,705,523
Total Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	2,279		2,279
2022	12,476		12,476
2021	10,811		10,811
2020	1,824		1,824
2019	7,953		7,953
Prior	16,157		16,157
Revolving Loans Amortized Cost Basis	1,931		1,931
Revolving Loans Converted to Term	1,708		1,708
Total loans	55,139		55,139
Total Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	333		333
2021	2,363		2,363
2020	0		0
2019	456		456
Prior	8,798		8,798
Revolving Loans Amortized Cost Basis	1,123		1,123
Revolving Loans Converted to Term	285		285
Total loans	13,358		13,358
Total Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0		0
2022	0		0
2021	0		0
2020	0		0
2019	0		0
Prior	0		0
Revolving Loans Amortized Cost Basis	218		218
Revolving Loans Converted to Term	24		24
Total loans	$ 242		$ 242