Premises and Equipment (Components of Premises and Equipment) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 62,062	$ 61,178
Less accumulated depreciation	(27,365)	(24,315)
Total	34,697	36,863
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	6,953	6,953
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	1,499	1,411
Premises [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	34,685	34,701
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 18,925	$ 18,113