Premises and Equipment (Components of Premises and Equipment) (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 65,390	$ 62,062
Less accumulated depreciation	(30,442)	(27,365)
Total	34,948	34,697
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	7,753	6,953
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	1,548	1,499
Premises [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	35,972	34,685
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 20,117	$ 18,925