Loans and Allowance For Loan Losses - Summary of Aging Analysis of the Loan Portfolio by the Time Past Due (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total	$ 1,352,639	$ 1,369,070
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Total	425,643	414,548
Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Total	41,558	37,193
SBA [Member]
Financing Receivable, Past Due [Line Items]
Total	204,734	317,564
Other Loans [Member]
Financing Receivable, Past Due [Line Items]
Total	64,253	49,075
Loans Receivable [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,234	234
Current	1,350,033	1,367,331
Total	1,352,639	1,369,070
Loans Receivable [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	1,372	1,505
Loans Receivable [Member] | Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Current	425,643	414,548
Total	425,643	414,548
Loans Receivable [Member] | Real Estate - Other [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,000
Current	614,830	549,185
Total	616,451	550,690
Loans Receivable [Member] | Real Estate - Other [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	621	1,505
Loans Receivable [Member] | Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Current	41,558	37,193
Total	41,558	37,193
Loans Receivable [Member] | SBA [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	234	234
Current	204,312	317,330
Total	204,734	317,564
Loans Receivable [Member] | SBA [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Current	188
Loans Receivable [Member] | Other Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	64,253	49,075
Total	$ 64,253	$ 49,075