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FAIR VALUE - Schedule of Additional Qualitative Information (Detail) - Fair Value, Measurements, Nonrecurring - Impaired loans
$ in Thousands
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Appraisal of Collateral    
Fair Value Inputs and Valuation Techniques [Line Items]    
Fair Value Estimate $ 3,051 $ 7,173
Minimum    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent)   0
Minimum | Appraisal of Collateral    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent)   0.07
Maximum    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent)   0.20
Maximum | Appraisal of Collateral    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent)   0.75
Measurement Input, Discount Rate | Minimum    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent) 0.06  
Measurement Input, Discount Rate | Minimum | Appraisal of Collateral    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent) 0.05  
Measurement Input, Discount Rate | Maximum    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent) 0.20  
Measurement Input, Discount Rate | Maximum | Appraisal of Collateral    
Fair Value Inputs and Valuation Techniques [Line Items]    
Asset, measurement input (percent) 0.75