Loans and Allowance for Credit Losses on Loans - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	$ 1,759,525	$ 1,678,292
Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	3,753
Loans Insured or Guaranteed by non-US Government Authorities | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	3,400
Commercial Real Estate
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	878,824	842,208
Commercial Real Estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	739
SBA—real estate
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	225,579	221,340
SBA—real estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	773
Home mortgage
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	515,789	$ 482,949
Home mortgage | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	2,241
Hotel / Motel | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	1,161
Hotel / Motel | Commercial Real Estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	739
Hotel / Motel | SBA—real estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	422
Hotel / Motel | Home mortgage | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	0
Gas Station | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	351
Gas Station | Commercial Real Estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	0
Gas Station | SBA—real estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	351
Gas Station | Home mortgage | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	0
Single-Family Residential | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	2,241
Single-Family Residential | Commercial Real Estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	0
Single-Family Residential | SBA—real estate | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	0
Single-Family Residential | Home mortgage | Collateralized Mortgage-Backed Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Total	$ 2,241