Premises And Equipment - Schedule Of Premises And Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Premises and equipment, Gross	$ 21,842	$ 20,523
Less accumulated depreciation	(7,121)	(6,261)
Construction in progress	142	27
Premises and equipment, net	14,863	14,289
Building
Property Plant And Equipment [Line Items]
Premises and equipment, Gross	12,765	12,765
Land
Property Plant And Equipment [Line Items]
Premises and equipment, Gross	2,856	2,856
Leasehold improvements
Property Plant And Equipment [Line Items]
Premises and equipment, Gross	1,083	996
Furniture, fixtures and equipment
Property Plant And Equipment [Line Items]
Premises and equipment, Gross	3,680	2,741
Computer software and equipment
Property Plant And Equipment [Line Items]
Premises and equipment, Gross	$ 1,458	$ 1,165