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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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No definition available.

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Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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