Loans and Allowance for Loan Losses - Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual restructured loans	$ 4,739	$ 5,633
Total Past Due	10,427	8,235
Current Loans	2,447,554	2,341,944
Total loans	2,487,129	2,382,243
Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	2,845	2,321
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	1,348	132
Past Due 90 Days or More and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	1,495	149
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual restructured loans	3,155	3,740
Total Past Due	5,215	3,941
Current Loans	1,051,549	992,912
Total loans	1,070,641	1,012,976
Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	565	134
Commercial Real Estate [Member] | Past Due 90 Days or More and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	1,495	67
Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual restructured loans	1,481	1,823
Total Past Due	3,785	3,872
Current Loans	419,104	429,800
Total loans	432,486	443,930
Consumer Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	968	1,916
Consumer Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	1,336	51
Consumer Real Estate [Member] | Past Due 90 Days or More and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing		82
Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual restructured loans	11	12
Total Past Due	654	257
Current Loans	279,969	272,470
Total loans	285,973	278,075
Construction and Land Development [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	643	245
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual restructured loans	60	36
Total Past Due	738	124
Current Loans	684,969	634,014
Total loans	686,010	634,446
Commercial and Industrial [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	666	12
Commercial and Industrial [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	12	76
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual restructured loans	32	22
Total Past Due	35	41
Current Loans	11,963	12,748
Total loans	12,019	12,816
Consumer and Other [Member] | Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing	3	14
Consumer and Other [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due and accruing		5
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	29,148	32,064
Total loans	29,148	32,064
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	13,877	16,123
Total loans	13,877	16,123
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	9,597	10,258
Total loans	9,597	10,258
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	5,350	5,348
Total loans	5,350	5,348
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	303	308
Total loans	303	308
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans	21	27
Total loans	$ 21	$ 27