Loans, Credit Exposures by Internally Assigned Grades, by Origination Year (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans	$ 1,723,475		$ 1,724,999
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]
Gross charge-offs	7	$ 5
Commercial Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	18,067
2022	259,523
2021	166,209
2020	107,380
2019	79,393
Prior	222,007
Revolving Loans Amortized Cost Basis	25,178
Revolving Loans Converted to Term	1,215
Total loans	878,972
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	18,067
2022	250,390
2021	166,134
2020	106,848
2019	72,432
Prior	208,583
Revolving Loans Amortized Cost Basis	24,312
Revolving Loans Converted to Term	1,206
Total loans	847,972
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	8,864
2021	0
2020	337
2019	6,746
Prior	8,295
Revolving Loans Amortized Cost Basis	276
Revolving Loans Converted to Term	0
Total loans	24,518
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	269
2021	75
2020	195
2019	215
Prior	5,129
Revolving Loans Amortized Cost Basis	590
Revolving Loans Converted to Term	9
Total loans	6,482
Agricultural Real Estate [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	6,208
2022	52,939
2021	33,247
2020	33,894
2019	27,792
Prior	145,032
Revolving Loans Amortized Cost Basis	12,101
Revolving Loans Converted to Term	1,580
Total loans	312,793
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	6,208
2022	49,878
2021	31,817
2020	33,894
2019	27,686
Prior	132,206
Revolving Loans Amortized Cost Basis	11,936
Revolving Loans Converted to Term	1,345
Total loans	294,970
Agricultural Real Estate [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	3,061
2021	1,430
2020	0
2019	0
Prior	6,938
Revolving Loans Amortized Cost Basis	70
Revolving Loans Converted to Term	3
Total loans	11,502
Agricultural Real Estate [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	0
2021	0
2020	0
2019	106
Prior	5,888
Revolving Loans Amortized Cost Basis	95
Revolving Loans Converted to Term	232
Total loans	6,321
Construction [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	3,887
2022	42,999
2021	26,581
2020	780
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	1,498
Revolving Loans Converted to Term	0
Total loans	75,745
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	3,320
2022	42,270
2021	23,685
2020	780
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	83
Revolving Loans Converted to Term	0
Total loans	70,138
Construction [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	567
2022	729
2021	539
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	1,415
Revolving Loans Converted to Term	0
Total loans	3,250
Construction [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	0
2021	2,357
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total loans	2,357
Other Commercial Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans	64,133		63,222
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
Other Commercial Loans [Member] | Construction [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	2,139
2022	6,429
2021	9,356
2020	5,208
2019	6,762
Prior	7,006
Revolving Loans Amortized Cost Basis	27,047
Revolving Loans Converted to Term	186
Total loans	64,133
Other Commercial Loans [Member] | Construction [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	2,139
2022	6,336
2021	9,123
2020	5,208
2019	6,459
Prior	5,446
Revolving Loans Amortized Cost Basis	26,635
Revolving Loans Converted to Term	118
Total loans	61,464
Other Commercial Loans [Member] | Construction [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	93
2021	233
2020	0
2019	105
Prior	62
Revolving Loans Amortized Cost Basis	128
Revolving Loans Converted to Term	40
Total loans	661
Other Commercial Loans [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	0
2021	0
2020	0
2019	198
Prior	1,498
Revolving Loans Amortized Cost Basis	284
Revolving Loans Converted to Term	0
Total loans	1,980
Other Commercial Loans [Member] | Construction [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by 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	28
Total loans	28
Other Agricultural Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	1,710
2022	2,552
2021	8,458
2020	1,452
2019	1,894
Prior	1,157
Revolving Loans Amortized Cost Basis	14,592
Revolving Loans Converted to Term	237
Total loans	32,052		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
Other Agricultural Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	1,710
2022	2,000
2021	8,423
2020	1,401
2019	1,875
Prior	670
Revolving Loans Amortized Cost Basis	13,979
Revolving Loans Converted to Term	0
Total loans	30,058
Other Agricultural Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	552
2021	35
2020	51
2019	10
Prior	67
Revolving Loans Amortized Cost Basis	478
Revolving Loans Converted to Term	0
Total loans	1,193
Other Agricultural Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	0
2021	0
2020	0
2019	9
Prior	420
Revolving Loans Amortized Cost Basis	135
Revolving Loans Converted to Term	237
Total loans	801
State and Political Subdivision Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	16,490
2021	12,271
2020	4,607
2019	7
Prior	26,511
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total loans	59,886		$ 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
State and Political Subdivision Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	16,490
2021	12,271
2020	4,607
2019	7
Prior	26,511
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total loans	59,886
State and Political Subdivision Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by 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
Total loans	0
State and Political Subdivision Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by 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
Total loans	0
Total Loans [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	32,011
2022	380,932
2021	256,122
2020	153,321
2019	115,848
Prior	401,713
Revolving Loans Amortized Cost Basis	80,416
Revolving Loans Converted to Term	3,218
Total loans	1,423,581
Total Loans [Member] | Pass [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	31,444
2022	367,364
2021	251,453
2020	152,738
2019	108,459
Prior	373,416
Revolving Loans Amortized Cost Basis	76,945
Revolving Loans Converted to Term	2,669
Total loans	1,364,488
Total Loans [Member] | Special Mention [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	567
2022	13,299
2021	2,237
2020	388
2019	6,861
Prior	15,362
Revolving Loans Amortized Cost Basis	2,367
Revolving Loans Converted to Term	43
Total loans	41,124
Total Loans [Member] | Substandard [Member]
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract]
2023	0
2022	269
2021	2,432
2020	195
2019	528
Prior	12,935
Revolving Loans Amortized Cost Basis	1,104
Revolving Loans Converted to Term	478
Total loans	17,941
Total Loans [Member] | Doubtful [Member]
Financing Receivable, before Allowance for Credit Loss, by 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	28
Total loans	$ 28