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PREMISES AND EQUIPMENT - Summary of Premises and Equipment (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
branchLocation
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Property, Plant and Equipment [Line Items]      
Bank premises and equipment, gross $ 60,471 $ 59,663  
Less accumulated depreciation 31,078 30,335  
Bank premises and equipment, net 29,393 29,328  
Depreciation expense $ 1,900 2,100 $ 2,300
Bank branch location closures | branchLocation 5    
Reduction to gross premised related to pending sale $ 6,200    
Reduction in accumulated depreciation, write-offs and write-downs related to pending sale (2,900)    
Land      
Property, Plant and Equipment [Line Items]      
Bank premises and equipment, gross 7,556 7,583  
Buildings and improvements      
Property, Plant and Equipment [Line Items]      
Bank premises and equipment, gross 24,570 24,813  
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Bank premises and equipment, gross 5,557 5,359  
Furniture and equipment      
Property, Plant and Equipment [Line Items]      
Bank premises and equipment, gross 22,195 21,849  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Bank premises and equipment, gross $ 593 $ 59