Premises and Equipment - Major Categories of Banking Premises and Equipment and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	$ 78,094	$ 67,845
Less: Accumulated depreciation	(42,304)	(39,464)
Premises and Equipment (Net)	35,790	28,381
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	6,838	6,896
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	40,831	34,501
Furnishings [Member]
Property, Plant and Equipment [Line Items]
Premises and Equipment (Gross)	$ 30,425	$ 26,448