Loans and Related Allowance for Loan Losses (Loans, Excluding PCI Loans, by Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	$ 1,165,310	$ 1,058,323
Loans And Leases Receivable Net Of Deferred Income	1,165,310	1,058,323
Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	891,084	854,925
Loans And Leases Receivable Net Of Deferred Income		854,925
Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	262,955	191,183
Loans And Leases Receivable Net Of Deferred Income		191,183
Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	10,257	11,163
Loans And Leases Receivable Net Of Deferred Income		11,163
All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	1,014	1,052
Loans And Leases Receivable Net Of Deferred Income		1,052
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	205,787	223,538
Loans And Leases Receivable Net Of Deferred Income		223,538
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	443,923	396,858
Loans And Leases Receivable Net Of Deferred Income		396,858
Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	151,529	146,566
Loans And Leases Receivable Net Of Deferred Income		146,566
Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	6,136	6,639
Loans And Leases Receivable Net Of Deferred Income		6,639
Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	76,587	72,978
Loans And Leases Receivable Net Of Deferred Income		72,978
Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	7,122	8,346
Loans And Leases Receivable Net Of Deferred Income		8,346
Loans Excluding PCI Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	1,165,310	1,058,323
Loans Excluding PCI Loans [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	891,084	854,925
Loans Excluding PCI Loans [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	262,955	191,183
Loans Excluding PCI Loans [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	10,257	11,163
Loans Excluding PCI Loans [Member] | All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	1,014	1,052
Loans Excluding PCI Loans [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	205,787	223,538
Loans Excluding PCI Loans [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	443,923	396,858
Loans Excluding PCI Loans [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	151,529	146,566
Loans Excluding PCI Loans [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	6,136	6,639
Loans Excluding PCI Loans [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	76,587	72,978
Loans Excluding PCI Loans [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	7,122	8,346
Loans Excluding PCI Loans [Member] | Pass [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	968,110	1,038,267
Loans Excluding PCI Loans [Member] | Pass [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	740,854	840,952
Loans Excluding PCI Loans [Member] | Pass [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	216,060	185,123
Loans Excluding PCI Loans [Member] | Pass [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	10,198	11,140
Loans Excluding PCI Loans [Member] | Pass [Member] | All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	998	1,052
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]
Total loans	191,802	219,210
Loans Excluding PCI Loans [Member] | Pass [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	318,456	391,251
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]
Total loans	148,857	145,782
Loans Excluding PCI Loans [Member] | Pass [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	5,156	6,096
Loans Excluding PCI Loans [Member] | Pass [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	69,930	70,515
Loans Excluding PCI Loans [Member] | Pass [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	6,653	8,098
Loans Excluding PCI Loans [Member] | Special Mention [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	187,038	10,137
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	145,581	7,351
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	41,394	2,770
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	47	16
Loans Excluding PCI Loans [Member] | Special Mention [Member] | All Other Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	16
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]
Total loans	12,544	2,964
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	123,432	3,188
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]
Total loans	1,550	408
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]
Total loans	980	543
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	6,657
Loans Excluding PCI Loans [Member] | Special Mention [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	418	248
Loans Excluding PCI Loans [Member] | Substandard [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	10,162	9,919
Loans Excluding PCI Loans [Member] | Substandard [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	4,649	6,622
Loans Excluding PCI Loans [Member] | Substandard [Member] | Commercial Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	5,501	3,290
Loans Excluding PCI Loans [Member] | Substandard [Member] | Consumer Installment Loans [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	12	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]
Total loans	1,441	1,364
Loans Excluding PCI Loans [Member] | Substandard [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	2,035	2,419
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]
Total loans	1,122	376
Loans Excluding PCI Loans [Member] | Substandard [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans		$ 2,463
Loans Excluding PCI Loans [Member] | Substandard [Member] | Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Noncancelable Obligations Future Minimum Payments Due [Line Items]
Total loans	$ 51