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Loans Receivable and Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | $ 13 |  | $ 13 |  | $ 157
Impaired Financing Receivable, with Related Allowance, Recorded Investment |  |  |  |  | 1,517
Impaired Financing Receivable, Recorded Investment | 13 |  | 13 |  | 1,674
Unpaid Principal Balance, With no related allowance recorded | 13 |  | 13 |  | 157
Unpaid Principal Balance, With an allowance recorded |  |  |  |  | 1,517
Unpaid Principal Balance, Total | 13 |  | 13 |  | 1,674
Associated Allowance |  |  |  |  | 272
Average Recorded Investment, Total | 835 | $ 2,479 | 1,115 | $ 2,528 |
Interest Income Recognized, Total | 23 |  | 40 | 1 |
Impaired Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment |  |  |  |  | 157
Commercial Real Estate Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment |  |  |  |  | 141
Impaired Financing Receivable, Recorded Investment |  |  |  |  | 1,658
Unpaid Principal Balance, With no related allowance recorded |  |  |  |  | 141
Unpaid Principal Balance, Total |  |  |  |  | 1,658
Associated Allowance |  |  |  |  | 272
Average Recorded Investment, Total | 822 | 1,467 | 1,100 | 1,541 |
Interest Income Recognized, Total | 20 |  | 37 | 1 |
Agricultural Real Estate Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Average Recorded Investment, Total |  | 858 |  | 858 |
Commercial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 13 |  | 13 |  | 16
Impaired Financing Receivable, with Related Allowance, Recorded Investment |  |  |  |  | 1,517
Impaired Financing Receivable, Recorded Investment | 13 |  | 13 |  | 16
Unpaid Principal Balance, With no related allowance recorded | 13 |  | 13 |  | 16
Unpaid Principal Balance, With an allowance recorded |  |  |  |  | 1,517
Unpaid Principal Balance, Total | 13 |  | 13 |  | 16
Associated Allowance |  |  |  |  | $ 272
Average Recorded Investment, Total | 13 | 29 | 15 | 19 |
Interest Income Recognized, Total | $ 3 |  | $ 3 |  |
Other Agricultural Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Average Recorded Investment, Total |  | $ 125 |  | $ 110 |

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