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Loan Quality And Allowance For Loan Losses (Troubled Debt Restructuring Loans) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2020 USD ($) item contract	Mar. 31, 2021 USD ($) contract
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		19	19
Troubled Debt Restructurings: Recorded Investment		$ 11,011	$ 10,861
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Troubled Debt Restructurings, New During Period, Number of Contracts | item		3
New During Period, Pre-TDR Modification		$ 1,076
New During Period, After-TDR Modification		1,076
Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	10,803	9,974
Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 208	$ 887
Residential Real Estate - Construction [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		1	1
Troubled Debt Restructurings: Recorded Investment		$ 434	$ 433
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Residential Real Estate - Construction [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 434	$ 433
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		4	4
Troubled Debt Restructurings: Recorded Investment		$ 637	$ 631
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Residential Real Estate [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 637	$ 631
Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		4	4
Troubled Debt Restructurings: Recorded Investment		$ 1,224	$ 1,213
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Troubled Debt Restructurings, New During Period, Number of Contracts | item		2
New During Period, Pre-TDR Modification		$ 426
New During Period, After-TDR Modification		426
Commercial Real Estate - Owner Occupied [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 1,224	$ 1,213
Commercial Real Estate - Farm Land [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		6	6
Troubled Debt Restructurings: Recorded Investment		$ 2,257	$ 2,224
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Troubled Debt Restructurings, New During Period, Number of Contracts | item		1
New During Period, Pre-TDR Modification		$ 650
New During Period, After-TDR Modification		650
Commercial Real Estate - Farm Land [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 2,257	1,542
Commercial Real Estate - Farm Land [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]		$ 682
Commercial Real Estate - Construction And Land [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		2	2
Troubled Debt Restructurings: Recorded Investment		$ 6,129	$ 6,038
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Commercial Real Estate - Construction And Land [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 6,129	$ 6,038
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Number of Contracts | contract		2	2
Troubled Debt Restructurings: Recorded Investment		$ 330	$ 322
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Number of Contracts | contract
Troubled Debt Restructurings That Have Defaulted on Modified Terms in the Last Twelve Months: Recorded Investment
Commercial Real Estate [Member] | Performing [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	122	117
Commercial Real Estate [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings: Recorded Investment	[1]	$ 208	$ 205
[1] The performing status is determined by the loan’s compliance with the modified terms.

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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

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Amount, after troubled debt restructuring, of modified financing receivable.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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