Loans and Asset Quality - Summary of Current, Past Due, and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	$ 1,841,585	$ 1,683,832
Nonaccrual	248	280
Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	1,840,185	1,682,457
30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	1,089	1,056
90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	63	39
Real estate | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	765,131	670,293
Nonaccrual	45	51
Real estate | Commercial real estate | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	765,005	669,781
Real estate | Commercial real estate | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	81	461
Real estate | Commercial real estate | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	0	0
Real estate | One-to-four family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	510,741	474,420
Nonaccrual	193	216
Real estate | One-to-four family residential | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	509,830	473,658
Real estate | One-to-four family residential | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	677	546
Real estate | One-to-four family residential | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	41	0
Real estate | Construction and development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	138,965	106,339
Nonaccrual	0	0
Real estate | Construction and development | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	138,647	106,300
Real estate | Construction and development | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	318	0
Real estate | Construction and development | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	0	39
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	320,169	311,373
Nonaccrual	10	13
Commercial and industrial | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	320,138	311,321
Commercial and industrial | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	3	39
Commercial and industrial | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	18	0
SBA PPP, net of deferred income
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	1,349	17,550
Nonaccrual	0	0
SBA PPP, net of deferred income | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	1,349	17,550
SBA PPP, net of deferred income | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	0	0
SBA PPP, net of deferred income | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	0	0
Tax-exempt
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	79,026	80,726
Nonaccrual	0	0
Tax-exempt | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	79,026	80,726
Tax-exempt | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	0	0
Tax-exempt | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	0	0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	26,204	23,131
Nonaccrual	0	0
Consumer | Current
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	26,190	23,121
Consumer | 30-89 Days Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	10	10
Consumer | 90 Days or More Past Due
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment	$ 4	$ 0