Loans and Allowance for Loan Losses (Loan Summary) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,903,248	$ 1,777,239
Less:  Allowance for loan losses	(10,243)	(8,275)	$ (5,860)
Loans, net	1,893,005	1,768,964
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	905,306	860,027
Less:  Allowance for loan losses	(4,508)	(3,639)	(2,465)
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	423,338	407,254
Less:  Allowance for loan losses	(2,576)	(1,789)	(1,596)
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	227,626	187,895
Less:  Allowance for loan losses	(1,127)	(795)	(521)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	337,075	308,254
Less:  Allowance for loan losses	(1,957)	(1,746)	(1,062)
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,903	13,809
Less:  Allowance for loan losses	(75)	(306)	$ (216)
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	26,987	34,158
Less:  Allowance for loan losses	(156)	0
Loans, net	26,831	34,158
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	15,255	17,682
Less:  Allowance for loan losses	(17)	0
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	6,541	8,712
Less:  Allowance for loan losses	(74)	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,458	4,602
Less:  Allowance for loan losses	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	407	2,557
Less:  Allowance for loan losses	(59)	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	326	605
Less:  Allowance for loan losses	(6)	0
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,876,261	1,743,081
Less:  Allowance for loan losses	(10,087)	(8,275)
Loans, net	1,866,174	1,734,806
All Other Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	890,051	842,345
Less:  Allowance for loan losses	(4,491)	(3,639)
All Other Loans [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	416,797	398,542
Less:  Allowance for loan losses	(2,502)	(1,789)
All Other Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	223,168	183,293
Less:  Allowance for loan losses	(1,127)	(795)
All Other Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	336,668	305,697
Less:  Allowance for loan losses	(1,898)	(1,746)
All Other Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,577	13,204
Less:  Allowance for loan losses	$ (69)	$ (306)