Loans Held for Investment - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	$ 32,928	$ 18,858
ACL	1,835	1,455
Non-Collateral Dependent Loans	11,517	12,415
ACL	0	0
Total Nonaccrual Loans	44,445	31,273
Nonaccrual Loans with No ACL	36,830	23,657
Investor loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	19,665	11,192
ACL	1,835	1,455
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	19,665	11,192
Nonaccrual Loans with No ACL	12,050	3,577
Investor loans secured by real estate \| CRE non-owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	10,230	10,255
ACL	1,835	1,455
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	10,230	10,255
Nonaccrual Loans with No ACL	2,615	2,640
Investor loans secured by real estate \| Multifamily
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	8,873
ACL	0
Non-Collateral Dependent Loans	0
ACL	0
Total Nonaccrual Loans	8,873
Nonaccrual Loans with No ACL	8,873
Investor loans secured by real estate \| SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	562	937
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	562	937
Nonaccrual Loans with No ACL	562	937
Business loans secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	5,095	5,541
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	5,095	5,541
Nonaccrual Loans with No ACL	5,095	5,541
Business loans secured by real estate \| SBA secured by real estate
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	206	589
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	206	589
Nonaccrual Loans with No ACL	206	589
Business loans secured by real estate \| CRE owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	4,889	4,952
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	4,889	4,952
Nonaccrual Loans with No ACL	4,889	4,952
Commercial loans
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	8,162	2,115
ACL	0	0
Non-Collateral Dependent Loans	11,517	12,415
ACL	0	0
Total Nonaccrual Loans	19,679	14,530
Nonaccrual Loans with No ACL	19,679	14,529
Commercial loans \| Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	4,744	1,462
ACL	0	0
Non-Collateral Dependent Loans	0	336
ACL	0	0
Total Nonaccrual Loans	4,744	1,798
Nonaccrual Loans with No ACL	4,744	1,797
Commercial loans \| Franchise non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	2,794	0
ACL	0	0
Non-Collateral Dependent Loans	11,517	12,079
ACL	0	0
Total Nonaccrual Loans	14,311	12,079
Nonaccrual Loans with No ACL	14,311	12,079
Commercial loans \| SBA non-real estate secured
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	624	653
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	624	653
Nonaccrual Loans with No ACL	624	653
Retail loans
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	6	10
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	6	10
Nonaccrual Loans with No ACL	6	10
Retail loans \| Single family residential
Financing Receivable, Nonaccrual [Line Items]
Collateral Dependent Loans	6	10
ACL	0	0
Non-Collateral Dependent Loans	0	0
ACL	0	0
Total Nonaccrual Loans	6	10
Nonaccrual Loans with No ACL	$ 6	$ 10

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