Premises and Equipment - Components of Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total cost	$ 98,718	$ 103,488
Less: accumulated depreciation	(47,779)	(46,606)
Net book value	50,939	56,882
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	11,772	15,070
Premises and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	51,191	56,267
Furniture, Equipment and Computer Software [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 35,755	$ 32,151