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Loans and Allowance for Credit Losses - Loans Summarized to Major Risk Category (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Retained Strategic Program loans	$ 290,659		$ 236,601
Allowance for credit losses	(12,321)	$ (12,034)	(11,985)	$ (10,602)	$ (9,987)	$ (9,855)
Net loans	277,663		224,217
Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	333,021		260,190
Loans held-for-sale	(42,362)		(23,589)
Retained Strategic Program loans	290,659		236,601
Deferred loan fees, net	(675)		(399)
Allowance for credit losses	(12,321)		(11,985)
Net loans	277,663		224,217
SBA
Loans and Leases Receivable Disclosure [Line Items]
Retained Strategic Program loans			145,172
Allowance for credit losses				(3,384)	(3,064)	(2,739)
SBA | Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	189,028		145,172
Retained Strategic Program loans			145,172
Allowance for credit losses			(4,294)
Commercial, non-real estate
Loans and Leases Receivable Disclosure [Line Items]
Retained Strategic Program loans			11,484
Allowance for credit losses				(274)	(107)	(132)
Commercial, non-real estate | Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	24,851		11,484
Retained Strategic Program loans			11,484
Allowance for credit losses			(401)
Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Retained Strategic Program loans	29,357		37,815
Allowance for credit losses	(708)	(799)	(876)	(415)	(411)	(352)
Residential real estate | Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	30,378		37,815
Retained Strategic Program loans			37,815
Allowance for credit losses			(497)
Strategic Program loans
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	63,094		47,848
Loans held-for-sale	(42,362)		(23,589)
Retained Strategic Program loans	20,732		24,259
Allowance for credit losses	(7,256)	(7,227)	(6,701)	(6,442)	(6,322)	(6,549)
Strategic Program loans | Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	63,094		47,848
Retained Strategic Program loans			24,259
Allowance for credit losses			(6,701)
Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Retained Strategic Program loans	170,253		12,063
Allowance for credit losses	(3,167)	(3,034)	(3,238)	(22)	(21)	(21)
Commercial real estate | Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	18,677		12,063
Retained Strategic Program loans			12,063
Allowance for credit losses			(27)
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Retained Strategic Program loans	6,180		5,808
Allowance for credit losses	(90)	$ (82)	(65)	$ (65)	$ (62)	$ (62)
Consumer | Financing Receivable, Incurred Loss Methodology
Loans and Leases Receivable Disclosure [Line Items]
Total Strategic Program loans	$ 6,993		5,808
Retained Strategic Program loans			5,808
Allowance for credit losses			$ (65)

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