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Loans Receivable and Allowance for Loan Losses (Summary of Recorded Investment by Internal Risk Rating Systems) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total $ 1,536,037 $ 1,474,424  
Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 56,028    
2022 208,661    
2021 156,749    
2020 113,519    
2019 102,947    
Prior 276,923    
Revolving Loans Amortized Cost Basis 63,861    
Total 978,688    
Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     $ 942,993
Pass [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 56,028    
2022 208,105    
2021 156,007    
2020 110,789    
2019 102,431    
Prior 273,211    
Revolving Loans Amortized Cost Basis 63,381    
Total 969,952    
Pass [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     934,256
Special Mention [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2021 247    
2020 185    
2019 107    
Prior 1,432    
Revolving Loans Amortized Cost Basis 155    
Total 2,126    
Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     2,187
Substandard [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2022 556    
2021 495    
2020 2,545    
2019 409    
Prior 2,280    
Revolving Loans Amortized Cost Basis 325    
Total 6,610    
Substandard [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     6,550
Commercial Real Estate Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total 668,386 651,544  
Commercial Real Estate Loans [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 25,867    
2022 133,953    
2021 116,497    
2020 76,838    
2019 76,905    
Prior 220,653    
Revolving Loans Amortized Cost Basis 17,673    
Total 668,386    
Current period gross charge-offs, 2019 112    
Current period gross charge-offs, Total 112    
Commercial Real Estate Loans [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     651,544
Commercial Real Estate Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 25,867    
2022 133,953    
2021 116,254    
2020 75,366    
2019 76,615    
Prior 217,831    
Revolving Loans Amortized Cost Basis 17,673    
Total 663,559    
Commercial Real Estate Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     646,775
Commercial Real Estate Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2021 243    
Prior 819    
Total 1,062    
Commercial Real Estate Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     1,079
Commercial Real Estate Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2020 1,472    
2019 290    
Prior 2,003    
Total 3,765    
Commercial Real Estate Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     3,690
Agricultural Real Estate Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total 68,381 68,915  
Agricultural Real Estate Loans [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,033    
2022 13,957    
2021 5,607    
2020 10,251    
2019 8,579    
Prior 28,049    
Revolving Loans Amortized Cost Basis 905    
Total 68,381    
Agricultural Real Estate Loans [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     68,915
Agricultural Real Estate Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 1,033    
2022 13,433    
2021 5,607    
2020 9,187    
2019 8,579    
Prior 27,429    
Revolving Loans Amortized Cost Basis 580    
Total 65,848    
Agricultural Real Estate Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     66,444
Agricultural Real Estate Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Prior 432    
Total 432    
Agricultural Real Estate Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     368
Agricultural Real Estate Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2022 524    
2020 1,064    
Prior 188    
Revolving Loans Amortized Cost Basis 325    
Total 2,101    
Agricultural Real Estate Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     2,103
Commercial Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total 207,888 187,257  
Commercial Loans [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 28,394    
2022 54,623    
2021 30,781    
2020 22,910    
2019 14,153    
Prior 23,273    
Revolving Loans Amortized Cost Basis 33,754    
Total 207,888    
Current period gross charge-offs, 2020 50    
Current period gross charge-offs, Total 50    
Commercial Loans [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     187,257
Commercial Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 28,394    
2022 54,591    
2021 30,757    
2020 22,901    
2019 14,153    
Prior 23,003    
Revolving Loans Amortized Cost Basis 33,754    
Total 207,553    
Commercial Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     186,966
Commercial Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Prior 181    
Total 181    
Commercial Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     184
Commercial Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2022 32    
2021 24    
2020 9    
Prior 89    
Total 154    
Commercial Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     107
Other Agricultural Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total 34,033 $ 35,277  
Other Agricultural Loans [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 734    
2022 6,128    
2021 3,864    
2020 3,520    
2019 3,310    
Prior 4,948    
Revolving Loans Amortized Cost Basis 11,529    
Total 34,033    
Other Agricultural Loans [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     35,277
Other Agricultural Loans [Member] | Pass [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2023 734    
2022 6,128    
2021 3,389    
2020 3,335    
2019 3,084    
Prior 4,948    
Revolving Loans Amortized Cost Basis 11,374    
Total 32,992    
Other Agricultural Loans [Member] | Pass [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     34,071
Other Agricultural Loans [Member] | Special Mention [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2021 4    
2020 185    
2019 107    
Revolving Loans Amortized Cost Basis 155    
Total 451    
Other Agricultural Loans [Member] | Special Mention [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     556
Other Agricultural Loans [Member] | Substandard [Member] | Non-Homogenous Pools [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
2021 471    
2019 119    
Total $ 590    
Other Agricultural Loans [Member] | Substandard [Member] | Aggregate Pass and Criticized Categories [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total     $ 650