Loans and Allowance for Loan Losses (Schedule of loan loss provision by change in allowance methodology) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	$ 755	$ 567	$ 629
Construction and Farmland
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	755		(145)
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	(763)		(17)
Commercial - Non Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	220		$ 444
Current Methodology
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	869
Current Methodology | Construction and Farmland
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	755
Current Methodology | Residential Portfolio Segment
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	315
Current Methodology | Commercial Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	(763)
Current Methodology | Commercial - Non Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	220
Current Methodology | Consumer Installment
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	213
Current Methodology | Other Loans
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	129
Prior Methodology
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	428
Prior Methodology | Construction and Farmland
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	89
Prior Methodology | Residential Portfolio Segment
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	363
Prior Methodology | Commercial Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	197
Prior Methodology | Commercial - Non Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	(371)
Prior Methodology | Consumer Installment
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	126
Prior Methodology | Other Loans
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	24
Difference
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	441
Difference | Construction and Farmland
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	666
Difference | Residential Portfolio Segment
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	(48)
Difference | Commercial Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	(960)
Difference | Commercial - Non Real Estate
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	591
Difference | Consumer Installment
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	87
Difference | Other Loans
Financing Receivable Impaired [Line Items]
Provision charged to operating expense	$ 105