Loans and Allowance For Credit Losses - Summary of Aging Analysis of the Loan Portfolio by the Time Past Due (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Current	$ 1,583,631
Total	1,583,631	$ 1,593,421
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Current	622,270
Total	622,270	634,535
Real Estate - Other [Member]
Financing Receivable, Past Due [Line Items]
Current	856,344
Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Current	60,595
Total	60,595	63,730
SBA [Member]
Financing Receivable, Past Due [Line Items]
Total	4,936	7,220
Other [Member]
Financing Receivable, Past Due [Line Items]
Current	39,486
Total	39,486	39,695
Loans Receivable [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	181	1,250
Current	1,582,957	1,589,011
Total	1,583,631	1,593,421
Loans Receivable [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	493	3,160
Loans Receivable [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	0
Loans Receivable [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	0
Loans Receivable [Member] | Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	0	1,028
Current	621,777	633,507
Total	622,270	634,535
Loans Receivable [Member] | Commercial And Industrial [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	493
Loans Receivable [Member] | Commercial And Industrial [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	0
Loans Receivable [Member] | Commercial And Industrial [Member] | Over 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	0
Loans Receivable [Member] | Real Estate - Other [Member]
Financing Receivable, Past Due [Line Items]
Current	856,344	845,081
Total	856,344	848,241
Loans Receivable [Member] | Real Estate - Other [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	0	3,160
Loans Receivable [Member] | Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Current	60,595	63,730
Total	60,595	63,730
Loans Receivable [Member] | SBA [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	181	222
Current	4,755	6,998
Total	4,936	7,220
Loans Receivable [Member] | SBA [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	0
Loans Receivable [Member] | Other [Member]
Financing Receivable, Past Due [Line Items]
Current	39,486	39,695
Total	$ 39,486	$ 39,695