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Premises and Equipment - Major Categories of Banking Premises and Equipment and Accumulated Depreciation (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Premises and Equipment (Gross) $ 79,487 $ 78,094
Less: Accumulated depreciation (45,659) (42,304)
Premises and Equipment (Net) 33,828 35,790
Land [Member]    
Property, Plant and Equipment [Line Items]    
Premises and Equipment (Gross) 6,803 6,838
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Premises and Equipment (Gross) 41,306 40,831
Furnishings [Member]    
Property, Plant and Equipment [Line Items]    
Premises and Equipment (Gross) $ 31,378 $ 30,425