Loans and Allowance For Credit Losses - Summary of Aging Analysis of the Loan Portfolio by the Time Past Due (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Current	$ 1,520,891	$ 1,559,533
Total	1,520,891	1,559,533
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Current	610,459	626,615
Total	610,459	626,615
Real Estate - Other [Member]
Financing Receivable, Past Due [Line Items]
Current	834,143	849,306
Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Current	35,886	44,186
Total	35,886	44,186
SBA [Member]
Financing Receivable, Past Due [Line Items]
Current	3,919	4,032
Total	3,919	4,032
Other [Member]
Financing Receivable, Past Due [Line Items]
Current	36,484	35,394
Total	36,484	35,394
Loans Receivable [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,212	3,781
Current	1,491,861	1,553,928
Total	1,520,891	1,559,533
Loans Receivable [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	10,218	1,824
Loans Receivable [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	17,360
Loans Receivable [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	240
Loans Receivable [Member] | Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,159	3,728
Current	604,367	622,887
Total	610,459	626,615
Loans Receivable [Member] | Commercial And Industrial [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	4,933
Loans Receivable [Member] | Real Estate - Other [Member]
Financing Receivable, Past Due [Line Items]
Current	829,099	847,482
Total	834,143	849,306
Loans Receivable [Member] | Real Estate - Other [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	5,044	1,824
Loans Receivable [Member] | Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Current	19,093	44,186
Total	35,886	44,186
Loans Receivable [Member] | Real Estate - Construction & Land [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	16,793
Loans Receivable [Member] | SBA [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	53	53
Current	3,468	3,979
Total	3,919	4,032
Loans Receivable [Member] | SBA [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	398
Loans Receivable [Member] | Other [Member]
Financing Receivable, Past Due [Line Items]
Current	35,834	35,394
Total	36,484	$ 35,394
Loans Receivable [Member] | Other [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	241
Loans Receivable [Member] | Other [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	169
Loans Receivable [Member] | Other [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	$ 240