Loans and Allowance for Credit Losses on Loans - Schedule of Recorded Investment in Nonaccrual Loans and Loans Past Due 90 or More Days and Still Accruing Interest by Portfolio Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual Loans with a Related Allowance for Credit Losses	$ 3,203	$ 2,705
Nonaccrual Loans without a Related Allowance for Credit Losses	1,140	3,377
Total Nonaccrual Loans	4,343	6,082
90 or More Days Past Due & Still Accruing	0	0
Total	4,343	6,082
Loans Insured or Guaranteed by non-US Government Authorities
Financing Receivable Recorded Investment Past Due [Line Items]
Total	3,100	2,000
Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual Loans with a Related Allowance for Credit Losses	319
Nonaccrual Loans without a Related Allowance for Credit Losses	0
Total Nonaccrual Loans	319
90 or More Days Past Due & Still Accruing	0
Total	319
SBA—real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual Loans with a Related Allowance for Credit Losses	2,489	2,302
Nonaccrual Loans without a Related Allowance for Credit Losses	1,140	1,136
Total Nonaccrual Loans	3,629	3,438
90 or More Days Past Due & Still Accruing	0	0
Total	3,629	3,438
SBA—non-real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual Loans with a Related Allowance for Credit Losses	178	154
Nonaccrual Loans without a Related Allowance for Credit Losses	0	0
Total Nonaccrual Loans	178	154
90 or More Days Past Due & Still Accruing	0	0
Total	178	154
Home mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Nonaccrual Loans with a Related Allowance for Credit Losses	217	249
Nonaccrual Loans without a Related Allowance for Credit Losses	0	2,241
Total Nonaccrual Loans	217	2,490
90 or More Days Past Due & Still Accruing	0	0
Total	$ 217	$ 2,490