Premises and Equipment - Summary of Components of Premises and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total before accumulated depreciation and amortization	$ 17,179	$ 17,849
Accumulated depreciation and amortization	(5,457)	(5,251)
Total	11,722	12,598
Land [Member]
Property, Plant and Equipment [Line Items]
Total before accumulated depreciation and amortization	1,468	1,468
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total before accumulated depreciation and amortization	$ 3,946	3,647
Estimated useful lives	40 years
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total before accumulated depreciation and amortization	$ 8,347	8,742
Estimated useful lives description	Lessor of lease term or useful life
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Total before accumulated depreciation and amortization	$ 3,311	3,157
Furniture, fixtures and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture, fixtures and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Total before accumulated depreciation and amortization	$ 107	$ 835