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Loans and Allowance for Credit Losses - Allowance for Loan Losses on Impaired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Allowance for Loan Losses
Total	$ 12,321	$ 12,034	$ 11,985	$ 10,602	$ 9,987	$ 9,855
Portfolio Loan Balances
Total loans held for investment	290,659		236,601
Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			11,985
Total	12,321		11,985
Portfolio Loan Balances
Individually			450
Collectively			236,151
Total loans held for investment	290,659		236,601
SBA
Allowance for Loan Losses
Total				3,384	3,064	2,739
Portfolio Loan Balances
Total loans held for investment			145,172
SBA | Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			4,294
Total			4,294
Portfolio Loan Balances
Individually			450
Collectively			144,722
Total loans held for investment			145,172
Commercial, non-real estate
Allowance for Loan Losses
Total				274	107	132
Portfolio Loan Balances
Total loans held for investment			11,484
Commercial, non-real estate | Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			401
Total			401
Portfolio Loan Balances
Individually			0
Collectively			11,484
Total loans held for investment			11,484
Residential real estate
Allowance for Loan Losses
Total	708	799	876	415	411	352
Portfolio Loan Balances
Total loans held for investment	29,357		37,815
Residential real estate | Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			497
Total			497
Portfolio Loan Balances
Individually			0
Collectively			37,815
Total loans held for investment			37,815
Retained Strategic Program loans
Allowance for Loan Losses
Total	7,256	7,227	6,701	6,442	6,322	6,549
Portfolio Loan Balances
Total loans held for investment	20,732		24,259
Retained Strategic Program loans | Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			6,701
Total			6,701
Portfolio Loan Balances
Individually			0
Collectively			24,259
Total loans held for investment			24,259
Commercial real estate
Allowance for Loan Losses
Total	3,167	3,034	3,238	22	21	21
Portfolio Loan Balances
Total loans held for investment	170,253		12,063
Commercial real estate | Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			27
Total			27
Portfolio Loan Balances
Individually			0
Collectively			12,063
Total loans held for investment			12,063
Consumer
Allowance for Loan Losses
Total	90	$ 82	65	$ 65	$ 62	$ 62
Portfolio Loan Balances
Total loans held for investment	$ 6,180		5,808
Consumer | Financing Receivable, Incurred Loss Methodology
Allowance for Loan Losses
Individually			0
Collectively			65
Total			65
Portfolio Loan Balances
Individually			0
Collectively			5,808
Total loans held for investment			$ 5,808

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