Loans and Related Allowance for Loan Losses (Age Analysis of Past Due Status of Loans, Excluding PCI Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 4,214	$ 5,292
Past Due	6,375	9,619
Current	1,171,334	1,048,704
Total Loans	1,177,709	1,058,323
30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	2,161	3,381
90+ Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		946
Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	2,725	5,223
Past Due	4,231	7,478
Current	903,991	847,447
Total Loans		854,925
Mortgage Loans on Real Estate [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,506	2,255
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	1,470	62
Past Due	2,105	2,093
Current	255,257	189,090
Total Loans		191,183
Commercial Loans [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	635	1,085
Commercial Loans [Member] | 90+ Days Past Due and Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		946
Consumer Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	19	7
Past Due	39	48
Current	10,567	11,115
Total Loans		11,163
Consumer Installment Loans [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	20	41
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,519	1,052
Total Loans		1,052
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	1,338	1,378
Past Due	2,617	2,686
Current	201,749	220,852
Total Loans		223,538
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,279	1,308
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	764	1,006
Past Due	764	1,558
Current	451,913	395,300
Total Loans		396,858
Commercial [Member] | Mortgage Loans on Real Estate [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		552
Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	572	376
Past Due	572	542
Current	159,194	146,024
Total Loans		146,566
Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		166
Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	227	229
Current	6,261	6,410
Total Loans		6,639
Second Mortgages [Member] | Mortgage Loans on Real Estate [Member] | 30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	227	229
Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual		2,463
Past Due		2,463
Current	77,787	70,515
Total Loans		72,978
Agriculture [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	51
Past Due	51
Current	$ 7,087	8,346
Total Loans		$ 8,346