Loans and Allowance for Loan Losses - Loan Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 2,382,243	$ 1,897,392
Less: Allowance for loan losses	(18,346)	(10,243)	$ (8,275)
Loans, net	2,363,897	1,887,149
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	32,064	26,987
Less: Allowance for loan losses	(309)	(156)
Loans, net	31,755	26,831
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,350,179	1,870,405
Less: Allowance for loan losses	(18,037)	(10,087)
Loans, net	2,332,142	1,860,318
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,012,976	905,306
Less: Allowance for loan losses	(7,579)	(4,508)	(3,639)
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	16,123	15,255
Less: Allowance for loan losses	0	(17)
Commercial Real Estate [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	996,853	890,051
Less: Allowance for loan losses	(7,579)	(4,491)
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	443,930	417,482
Less: Allowance for loan losses	(3,471)	(2,576)	(1,789)
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	10,258	6,541
Less: Allowance for loan losses	(88)	(74)
Consumer Real Estate [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	433,672	410,941
Less: Allowance for loan losses	(3,383)	(2,502)
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	278,075	227,626
Less: Allowance for loan losses	(2,076)	(1,127)	(795)
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,348	4,458
Less: Allowance for loan losses	0
Construction and Land Development [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	272,727	223,168
Less: Allowance for loan losses	(2,076)	(1,127)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	634,446	337,075
Less: Allowance for loan losses	(5,107)	(1,957)	(1,746)
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	308	407
Less: Allowance for loan losses	(218)	(59)
Commercial and Industrial [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	634,138	336,668
Less: Allowance for loan losses	(4,889)	(1,898)
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	12,816	9,903
Less: Allowance for loan losses	(113)	(75)	$ (306)
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	27	326
Less: Allowance for loan losses	(3)	(6)
Consumer and Other [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	12,789	9,577
Less: Allowance for loan losses	$ (110)	$ (69)