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Loans Receivable and Allowance for Loan Losses (Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Performing [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | $ 441,425 | $ 398,553
Nonperforming [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 756 | 646
Summarized by Aggregate Risk Rating [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 970,108 | 525,477
Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 943,427 | 509,804
Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 14,680 | 12,516
Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 12,001 | 3,157
Doubtful Or Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  | 0
Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  | 0
Summarized by Performance of Individual Credits [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 442,181 | 399,199
Commercial Real Estate Loans [Member] | Summarized by Aggregate Risk Rating [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 579,104 | 391,327
Commercial Real Estate Loans [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 566,418 | 376,109
Commercial Real Estate Loans [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 6,346 | 12,268
Commercial Real Estate Loans [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 6,340 | 2,950
Commercial Real Estate Loans [Member] | Doubtful Or Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  | 0
Commercial Real Estate Loans [Member] | Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  | 0
Agricultural Real Estate Loans [Member] | Summarized by Aggregate Risk Rating [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 66,334 |
Agricultural Real Estate Loans [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 58,322 |
Agricultural Real Estate Loans [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 5,111 |
Agricultural Real Estate Loans [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 2,901 |
Commercial [Member] | Summarized by Aggregate Risk Rating [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 283,741 | 134,150
Commercial [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 282,915 | 133,695
Commercial [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 437 | 248
Commercial [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 389 | 207
Commercial [Member] | Doubtful Or Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  | 0
Commercial [Member] | Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  | 0
Other Agricultural Loans [Member] | Summarized by Aggregate Risk Rating [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 40,929 |
Other Agricultural Loans [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 35,772 |
Other Agricultural Loans [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 2,786 |
Other Agricultural Loans [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 2,371 |
Other Agricultural Loans [Member] | Doubtful Or Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  |
Other Agricultural Loans [Member] | Loss [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  |
Residential Real Estate Loans [Member] | Performing [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 262,556 | 229,214
Residential Real Estate Loans [Member] | Nonperforming [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 571 | 567
Residential Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 263,127 | 229,781
Construction Real Estate Loans [Member] | Performing [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 21,005 | 17,732
Construction Real Estate Loans [Member] | Nonperforming [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount |  |
Construction Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 21,005 | 17,732
Consumer Loans To Individuals [Member] | Performing [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 157,864 | 151,607
Consumer Loans To Individuals [Member] | Nonperforming [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | 185 | 79
Consumer Loans To Individuals [Member] | Summarized by Performance of Individual Credits [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Amount | $ 158,049 | $ 151,686

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