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, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total	$ 1,299,481	$ 949,652
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Total	365,881	389,746
Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Total	49,524	42,519
SBA [Member]
Financing Receivable, Past Due [Line Items]
Total	373,429	12,830
Other Loans [Member]
Financing Receivable, Past Due [Line Items]
Total	1,731	1,628
Loans Receivable [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,243	2,753
Current	1,297,048	945,459
Total	1,299,481	949,652
Loans Receivable [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	1,190
Loans Receivable [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due		1,440
Loans Receivable [Member] | Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,008	2,409
Current	363,683	385,897
Total	365,881	389,746
Loans Receivable [Member] | Commercial And Industrial [Member] | Over 30 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	1,190
Loans Receivable [Member] | Commercial And Industrial [Member] | Over 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due		1,440
Loans Receivable [Member] | Real Estate - Other [Member]
Financing Receivable, Past Due [Line Items]
Current	508,916	502,929
Total	508,916	502,929
Loans Receivable [Member] | Real Estate - Construction & Land [Member]
Financing Receivable, Past Due [Line Items]
Current	49,524	42,519
Total	49,524	42,519
Loans Receivable [Member] | SBA [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	235	344
Current	373,194	12,486
Total	373,429	12,830
Loans Receivable [Member] | Other Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	1,731	1,628
Total	$ 1,731	$ 1,628