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Loans, Credit Exposures by Internally Assigned Grades, by Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans	$ 2,331,002		$ 2,331,002		$ 2,248,836
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
Gross charge-offs	1,212	$ 808	2,568	$ 819
Commercial Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	38,080		38,080		90,740
2023/2022	89,319		89,319		342,975
2022/2021	372,862		372,862		225,106
2021/2020	208,653		208,653		124,112
2020/2019	115,861		115,861		89,157
Prior	251,513		251,513		190,402
Revolving Loans Amortized Cost Basis	32,035		32,035		28,773
Revolving Loans Converted to Term	2,225		2,225		1,622
Total loans	1,110,548		1,110,548		1,092,887
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
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	38,080		38,080		90,068
2023/2022	87,934		87,934		333,710
2022/2021	348,635		348,635		224,873
2021/2020	204,747		204,747		122,560
2020/2019	113,932		113,932		81,557
Prior	232,156		232,156		180,799
Revolving Loans Amortized Cost Basis	29,762		29,762		28,360
Revolving Loans Converted to Term	1,821		1,821		1,140
Total loans	1,057,067		1,057,067		1,063,067
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		672
2023/2022	813		813		7,963
2022/2021	10,395		10,395		227
2021/2020	3,361		3,361		1,552
2020/2019	1,384		1,384		7,442
Prior	8,573		8,573		8,159
Revolving Loans Amortized Cost Basis	1,917		1,917		96
Revolving Loans Converted to Term	0		0		60
Total loans	26,443		26,443		26,171
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	572		572		1,302
2022/2021	13,832		13,832		6
2021/2020	545		545		0
2020/2019	545		545		158
Prior	10,784		10,784		1,444
Revolving Loans Amortized Cost Basis	356		356		317
Revolving Loans Converted to Term	404		404		422
Total loans	27,038		27,038		3,649
Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
Agricultural Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	30,064		30,064		23,206
2023/2022	26,079		26,079		56,644
2022/2021	57,825		57,825		30,489
2021/2020	28,126		28,126		32,058
2020/2019	30,231		30,231		26,470
Prior	141,992		141,992		131,132
Revolving Loans Amortized Cost Basis	16,850		16,850		14,105
Revolving Loans Converted to Term	567		567		698
Total loans	331,734		331,734		314,802
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]
2024/2023	26,932		26,932		22,632
2023/2022	25,900		25,900		47,479
2022/2021	47,419		47,419		28,990
2021/2020	26,858		26,858		32,058
2020/2019	30,231		30,231		25,406
Prior	132,022		132,022		118,700
Revolving Loans Amortized Cost Basis	14,143		14,143		10,495
Revolving Loans Converted to Term	117		117		460
Total loans	303,622		303,622		286,220
Agricultural Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	2,883		2,883		574
2023/2022	140		140		9,165
2022/2021	10,072		10,072		1,499
2021/2020	241		241		0
2020/2019	0		0		962
Prior	6,102		6,102		7,038
Revolving Loans Amortized Cost Basis	1,960		1,960		3,535
Revolving Loans Converted to Term	28		28		0
Total loans	21,426		21,426		22,773
Agricultural Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	249		249		0
2023/2022	39		39		0
2022/2021	334		334		0
2021/2020	1,027		1,027		0
2020/2019	0		0		102
Prior	3,868		3,868		5,394
Revolving Loans Amortized Cost Basis	747		747		75
Revolving Loans Converted to Term	422		422		238
Total loans	6,686		6,686		5,809
Agricultural Real Estate [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
Construction [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	30,661		30,661		56,547
2023/2022	54,158		54,158		107,994
2022/2021	78,552		78,552		29,280
2021/2020	10,728		10,728		0
2020/2019	3,487		3,487		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	1,120		1,120		839
Revolving Loans Converted to Term	0		0		1,166
Total loans	178,706		178,706		195,826
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]
2024/2023	30,661		30,661		54,973
2023/2022	54,158		54,158		102,562
2022/2021	73,526		73,526		22,508
2021/2020	5,829		5,829		0
2020/2019	3,487		3,487		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	1,120		1,120		839
Revolving Loans Converted to Term	0		0		1,166
Total loans	168,781		168,781		182,048
Construction [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		1,574
2023/2022	0		0		5,432
2022/2021	4,614		4,614		4,415
2021/2020	2,951		2,951		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	7,565		7,565		11,421
Construction [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	412		412		2,357
2021/2020	1,948		1,948		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	2,360		2,360		2,357
Construction [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
Other Commercial Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	32,543		32,543		31,596
2023/2022	22,623		22,623		11,556
2022/2021	9,362		9,362		10,526
2021/2020	8,060		8,060		4,977
2020/2019	2,596		2,596		5,130
Prior	4,734		4,734		5,126
Revolving Loans Amortized Cost Basis	52,578		52,578		65,439
Revolving Loans Converted to Term	1,789		1,789		1,818
Total loans	134,285		134,285		136,168
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023			0		200
2023/2022			0		0
2022/2021			0		0
2021/2020			0		763
2020/2019			0		0
Prior			0		0
Revolving Loans Amortized Cost Basis			2,502		0
Revolving Loans Converted to Term			0		0
Gross charge-offs	1,183	763	2,502	763	963
Other Commercial Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	32,035		32,035		31,493
2023/2022	22,623		22,623		11,407
2022/2021	7,487		7,487		9,016
2021/2020	6,676		6,676		4,793
2020/2019	2,339		2,339		4,758
Prior	3,758		3,758		3,530
Revolving Loans Amortized Cost Basis	47,044		47,044		63,285
Revolving Loans Converted to Term	78		78		93
Total loans	122,040		122,040		128,375
Other Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	330		330		51
2023/2022	0		0		52
2022/2021	1,848		1,848		1,510
2021/2020	1,384		1,384		184
2020/2019	0		0		223
Prior	65		65		629
Revolving Loans Amortized Cost Basis	5,189		5,189		1,652
Revolving Loans Converted to Term	33		33		36
Total loans	8,849		8,849		4,337
Other Commercial Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	178		178		52
2023/2022	0		0		97
2022/2021	27		27		0
2021/2020	0		0		0
2020/2019	257		257		149
Prior	911		911		967
Revolving Loans Amortized Cost Basis	345		345		502
Revolving Loans Converted to Term	1,662		1,662		1,667
Total loans	3,380		3,380		3,434
Other Commercial Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	16		16		22
Total loans	16		16		22
Other Agricultural Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	4,897		4,897		3,902
2023/2022	2,483		2,483		1,993
2022/2021	1,449		1,449		6,671
2021/2020	4,766		4,766		1,088
2020/2019	457		457		536
Prior	435		435		560
Revolving Loans Amortized Cost Basis	10,033		10,033		15,863
Revolving Loans Converted to Term	17		17		60
Total loans	24,537		24,537		30,673
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	0	0
Other Agricultural Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	4,051		4,051		3,902
2023/2022	2,127		2,127		1,520
2022/2021	992		992		6,448
2021/2020	4,391		4,391		1,046
2020/2019	457		457		532
Prior	268		268		305
Revolving Loans Amortized Cost Basis	9,148		9,148		15,331
Revolving Loans Converted to Term	0		0		0
Total loans	21,434		21,434		29,084
Other Agricultural Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	626		626		0
2023/2022	0		0		473
2022/2021	372		372		16
2021/2020	365		365		42
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	760		760		488
Revolving Loans Converted to Term	0		0		29
Total loans	2,123		2,123		1,048
Other Agricultural Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	220		220		0
2023/2022	356		356		0
2022/2021	85		85		207
2021/2020	10		10		0
2020/2019	0		0		4
Prior	167		167		255
Revolving Loans Amortized Cost Basis	125		125		44
Revolving Loans Converted to Term	17		17		31
Total loans	980		980		541
Other Agricultural Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
State and Political Subdivision Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		1,623
2023/2022	1,458		1,458		14,171
2022/2021	13,497		13,497		10,841
2021/2020	10,664		10,664		5,235
2020/2019	5,357		5,357		0
Prior	23,898		23,898		25,294
Revolving Loans Amortized Cost Basis	0		0		10
Revolving Loans Converted to Term	0		0		0
Total loans	54,874		54,874		57,174
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	$ 0	0
State and Political Subdivision Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		1,623
2023/2022	1,458		1,458		14,171
2022/2021	13,497		13,497		10,841
2021/2020	10,664		10,664		5,235
2020/2019	5,357		5,357		0
Prior	23,898		23,898		25,294
Revolving Loans Amortized Cost Basis	0		0		10
Revolving Loans Converted to Term	0		0		0
Total loans	54,874		54,874		57,174
State and Political Subdivision Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
State and Political Subdivision Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
State and Political Subdivision Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total loans	0		0		0
Total Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	136,245		136,245		207,614
2023/2022	196,120		196,120		535,333
2022/2021	533,547		533,547		312,913
2021/2020	270,997		270,997		167,470
2020/2019	157,989		157,989		121,293
Prior	422,572		422,572		352,514
Revolving Loans Amortized Cost Basis	112,616		112,616		125,029
Revolving Loans Converted to Term	4,598		4,598		5,364
Total loans	1,834,684		1,834,684		1,827,530
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
2024/2023			0		200
2023/2022			0		0
2022/2021			0		0
2021/2020			0		763
2020/2019			0		0
Prior			0		0
Revolving Loans Amortized Cost Basis			2,502		0
Revolving Loans Converted to Term			0		0
Gross charge-offs			2,502		963
Total Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	131,759		131,759		204,691
2023/2022	194,200		194,200		510,849
2022/2021	491,556		491,556		302,676
2021/2020	259,165		259,165		165,692
2020/2019	155,803		155,803		112,253
Prior	392,102		392,102		328,628
Revolving Loans Amortized Cost Basis	101,217		101,217		118,320
Revolving Loans Converted to Term	2,016		2,016		2,859
Total loans	1,727,818		1,727,818		1,745,968
Total Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	3,839		3,839		2,871
2023/2022	953		953		23,085
2022/2021	27,301		27,301		7,667
2021/2020	8,302		8,302		1,778
2020/2019	1,384		1,384		8,627
Prior	14,740		14,740		15,826
Revolving Loans Amortized Cost Basis	9,826		9,826		5,771
Revolving Loans Converted to Term	61		61		125
Total loans	66,406		66,406		65,750
Total Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	647		647		52
2023/2022	967		967		1,399
2022/2021	14,690		14,690		2,570
2021/2020	3,530		3,530		0
2020/2019	802		802		413
Prior	15,730		15,730		8,060
Revolving Loans Amortized Cost Basis	1,573		1,573		938
Revolving Loans Converted to Term	2,505		2,505		2,358
Total loans	40,444		40,444		15,790
Total Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
2020/2019	0		0		0
Prior	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	16		16		22
Total loans	$ 16		$ 16		$ 22

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