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LOANS - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2020
USD ($)
contract
Jun. 30, 2019
contract
Apr. 30, 2020
USD ($)
loan
Dec. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Collectively evaluated for impairment $ 31,643     $ 24,665    
Unpaid principal amount 27,442     27,043    
Allowance for loan losses $ 38,403     45,436 $ 27,857 $ 23,451
Number of loans modified as troubled debt restructuring | contract 2 1        
Loans modified as troubled debt restructuring, Amount $ 6,903     $ 311    
Subsequent Event | COVID-19            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Loans approved, amount     $ 644,000      
Minimum | Subsequent Event | COVID-19            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Number of loans approved | loan     420      
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Collectively evaluated for impairment 51,882          
Unpaid principal amount 52,588          
Discount (premium) 706          
Allowance for loan losses $ 56