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Premises and Equipment - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 150 $ 128  
Buildings and improvements 20,775   $ 19,264
Hanceville Branch [Member]      
Property, Plant and Equipment [Line Items]      
Buildings and improvements 36   8
South Branch [Member]      
Property, Plant and Equipment [Line Items]      
Buildings and improvements     55
New278 Drive Thru [Member]      
Property, Plant and Equipment [Line Items]      
Buildings and improvements $ 6,135   $ 4,676