Loans Receivable and Allowance for Loan Losses (Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	$ 934,036	$ 914,610
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	923,677	900,036
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	2,370	5,555
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	7,989	8,747
Doubtful Or Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount		272
Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	470,981	441,430
Summarized by Performance of Individual Credits [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	470,371	440,906
Summarized by Performance of Individual Credits [Member] | Nonperforming [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	610	524
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	645,404	628,724
Commercial Real Estate Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	640,130	618,541
Commercial Real Estate Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	1,141	5,146
Commercial Real Estate Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	4,133	4,765
Commercial Real Estate Loans [Member] | Doubtful Or Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount		272
Agricultural Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	65,334	61,925
Agricultural Real Estate Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	62,599	60,193
Agricultural Real Estate Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	155
Agricultural Real Estate Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	2,580	1,732
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	187,206	186,031
Commercial [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	186,935	185,729
Commercial [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	190	199
Commercial [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	81	103
Other Agricultural Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	36,092	37,930
Other Agricultural Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	34,013	35,573
Other Agricultural Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	884	210
Other Agricultural Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	1,195	2,147
Residential Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	289,157	273,040
Residential Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	288,701	272,571
Residential Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member] | Nonperforming [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	456	469
Construction Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	21,856	21,990
Construction Real Estate Loans [Member] | Summarized by Performance of Individual Credits [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	21,856	21,990
Consumer Loans To Individuals [Member] | Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	159,968	146,400
Consumer Loans To Individuals [Member] | Summarized by Performance of Individual Credits [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	159,814	146,345
Consumer Loans To Individuals [Member] | Summarized by Performance of Individual Credits [Member] | Nonperforming [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	$ 154	$ 55