Premises and Equipment - Year-End Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 109,601	$ 106,090
Accumulated depreciation	(52,832)	(42,072)
Premises and equipment, net	56,769	64,018
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	8,392	7,919
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	39,874	35,138
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 61,335	$ 63,033