Loans and Allowance for Loan Losses - Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	$ 0	$ 607
Nonaccrual	2,248	2,743
Total Past Due and Nonaccrual	5,148	6,651
Current Loans	2,364,826	1,863,754
Total loans	2,404,057	1,897,392
Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	1,632	3,182
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	1,268	119
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Nonaccrual	418	124
Total Past Due and Nonaccrual	1,595	612
Current Loans	1,012,587	889,439
Total loans	1,030,651	905,306
Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	561	466
Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	616	22
Consumer Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Nonaccrual	1,586	1,872
Total Past Due and Nonaccrual	2,685	3,466
Current Loans	426,824	407,475
Total loans	440,310	417,482
Consumer Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	975	1,564
Consumer Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	124	30
Construction and Land Development [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	607
Nonaccrual	0	620
Total Past Due and Nonaccrual	10	1,734
Current Loans	268,753	221,434
Total loans	275,172	227,626
Construction and Land Development [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	10	507
Construction and Land Development [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	0	0
Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Nonaccrual	204	57
Total Past Due and Nonaccrual	226	669
Current Loans	643,955	335,999
Total loans	644,498	337,075
Commercial and Industrial [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	16	559
Commercial and Industrial [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	6	53
Consumer and Other [Member]
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Accruing	0	0
Nonaccrual	40	70
Total Past Due and Nonaccrual	632	170
Current Loans	12,707	9,407
Total loans	13,426	9,903
Consumer and Other [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	70	86
Consumer and Other [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Past due and accruing	522	14
Purchased Credit Impaired Loans [Member]
Financing Receivable, Past Due [Line Items]
Total loans	34,083	26,987
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total loans	16,469	15,255
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Total loans	10,801	6,541
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Past Due [Line Items]
Total loans	6,409	4,458
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Total loans	317	407
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Financing Receivable, Past Due [Line Items]
Total loans	$ 87	$ 326