Loans and Related Allowance for Loan Losses (Loans, Excluding PCI Loans, by Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	$ 1,058,323	$ 993,705
Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	854,925	791,290
Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	191,183	188,722
Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	11,163	12,048
All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	1,052	1,645
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	223,538	216,268
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	396,858	379,904
Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	146,566	120,413
Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	6,639	6,778
Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	72,978	59,557
Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	8,346	8,370
Loans Excluding PCI Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	1,058,323	993,705
Loans Excluding PCI Loans [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	854,925	791,290
Loans Excluding PCI Loans [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	191,183	188,722
Loans Excluding PCI Loans [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	11,163	12,048
Loans Excluding PCI Loans [Member] | All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	1,052	1,645
Loans Excluding PCI Loans [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	223,538	216,268
Loans Excluding PCI Loans [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	396,858	379,904
Loans Excluding PCI Loans [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	146,566	120,413
Loans Excluding PCI Loans [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	6,639	6,778
Loans Excluding PCI Loans [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	72,978	59,557
Loans Excluding PCI Loans [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	8,346	8,370
Loans Excluding PCI Loans [Member] | Pass [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	1,038,267	969,718
Loans Excluding PCI Loans [Member] | Pass [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	840,952	772,027
Loans Excluding PCI Loans [Member] | Pass [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	185,123	184,004
Loans Excluding PCI Loans [Member] | Pass [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	11,140	12,042
Loans Excluding PCI Loans [Member] | Pass [Member] | All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	1,052	1,645
Loans Excluding PCI Loans [Member] | Pass [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	219,210	211,832
Loans Excluding PCI Loans [Member] | Pass [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	391,251	372,745
Loans Excluding PCI Loans [Member] | Pass [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	145,782	115,650
Loans Excluding PCI Loans [Member] | Pass [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	6,096	6,686
Loans Excluding PCI Loans [Member] | Pass [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	70,515	56,802
Loans Excluding PCI Loans [Member] | Pass [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	8,098	8,312
Loans Excluding PCI Loans [Member] | Special Mention [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	10,137	9,072
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	7,351	7,268
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	2,770	1,798
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	16	6
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	2,964	3,179
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	3,188	3,551
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	408	192
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	543	92
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income		196
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	248	58
Loans Excluding PCI Loans [Member] | Substandard [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	9,919	14,915
Loans Excluding PCI Loans [Member] | Substandard [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	6,622	11,995
Loans Excluding PCI Loans [Member] | Substandard [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	3,290	2,920
Loans Excluding PCI Loans [Member] | Substandard [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	7
Loans Excluding PCI Loans [Member] | Substandard [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	1,364	1,257
Loans Excluding PCI Loans [Member] | Substandard [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	2,419	3,608
Loans Excluding PCI Loans [Member] | Substandard [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	376	4,571
Loans Excluding PCI Loans [Member] | Substandard [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income	2,463	2,559
Loans Excluding PCI Loans [Member] | Doubtful [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income
Loans Excluding PCI Loans [Member] | Doubtful [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Loans And Leases Receivable Net Of Deferred Income