Loans and Asset Quality - Schedule of Current, Past Due, and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	$ 1,683,832	$ 1,588,446
Nonaccrual	280	3,307
Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	1,682,457	1,584,672
30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	1,056	464
90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	39	3
Real estate | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	670,293	556,769
Nonaccrual	51	1,846
Real estate | Commercial real estate | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	669,781	554,861
Real estate | Commercial real estate | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	461	62
Real estate | Commercial real estate | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
Real estate | One-to-four family residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	474,420	442,889
Nonaccrual	216	574
Real estate | One-to-four family residential | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	473,658	442,096
Real estate | One-to-four family residential | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	546	219
Real estate | One-to-four family residential | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
Real estate | Construction and development
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	106,339	127,321
Nonaccrual	0	0
Real estate | Construction and development | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	106,300	127,258
Real estate | Construction and development | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	63
Real estate | Construction and development | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	39	0
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	311,373	250,428
Nonaccrual	13	882
Commercial and industrial | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	311,321	249,453
Commercial and industrial | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	39	93
Commercial and industrial | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
SBA PPP, net of deferred income
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	17,550	118,447
Nonaccrual	0	0
SBA PPP, net of deferred income | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	17,550	118,447
SBA PPP, net of deferred income | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
SBA PPP, net of deferred income | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
Tax-exempt
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	80,726	68,666
Nonaccrual	0	0
Tax-exempt | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	80,726	68,666
Tax-exempt | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
Tax-exempt | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	0	0
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	23,131	23,926
Nonaccrual	0	5
Consumer | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	23,121	23,891
Consumer | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	10	27
Consumer | 90 Days or More Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans held for investment	$ 0	$ 3