Loans and Allowance for Credit Losses on Loans - Schedule of Aging Analysis of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	$ 1,759,525	$ 1,678,292
Accrued interest receivable	7,100	6,400
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	878,824	842,208
SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	225,579	221,340
SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	14,575	13,377
C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	124,632	116,951
Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	515,789	482,949
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	126	1,467
Total Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	12,146	4,009
Total Past Due | Loans Insured or Guaranteed by non-US Government Authorities
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	5,100	924
Total Past Due | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	1,938	0
Total Past Due | SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	2,565	374
Total Past Due | SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	168	64
Total Past Due | C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	789	0
Total Past Due | Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	6,686	3,571
Total Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	6,855	1,944
30-59 Days Past Due | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	1,199	0
30-59 Days Past Due | SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	1,668	199
30-59 Days Past Due | SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	38
30-59 Days Past Due | C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	789	0
30-59 Days Past Due | Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	3,199	1,707
30-59 Days Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	3,116	1,697
60-89 Days Past Due | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	739	0
60-89 Days Past Due | SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	499	175
60-89 Days Past Due | SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	6	0
60-89 Days Past Due | C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
60-89 Days Past Due | Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	1,872	1,522
60-89 Days Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
> 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	2,175	368
> 90 Days Past Due | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
> 90 Days Past Due | SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	398	0
> 90 Days Past Due | SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	162	26
> 90 Days Past Due | C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
> 90 Days Past Due | Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	1,615	342
> 90 Days Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	0	0
Loans Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	1,747,379	1,674,283
Loans Not Past Due | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	876,886	842,208
Loans Not Past Due | SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	223,014	220,966
Loans Not Past Due | SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	14,407	13,313
Loans Not Past Due | C&I
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	123,843	116,951
Loans Not Past Due | Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	509,103	479,378
Loans Not Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans receivable	$ 126	$ 1,467