Premises and Equipment (Components of Premises and Equipment) (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 62,924	$ 65,390
Less accumulated depreciation	(31,465)	(30,442)
Property, Plant and Equipment, Net, Total	31,459	34,948
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	7,745	7,753
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	1,384	1,548
Premises [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	34,922	35,972
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 18,873	$ 20,117