Loans and Allowance For Credit Losses - Schedule of Amortized Cost of Individually Evaluated Loans by Type of Collateral (Detail) - Loans Receivable [Member] - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 181	$ 1,250
SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	181	222
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	0	1,028
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	181	222
Residential Real Estate [Member] | SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	181	222
Residential Real Estate [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual		0
Business Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	0	1,028
Business Assets [Member] | SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 0	0
Business Assets [Member] | Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual		$ 1,028