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FAIR VALUE - Additional information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Dec. 31, 2019
Fair Value Measurements Of Financial Instruments [Line Items]        
Net loss on sale of loans held for investment $ (416) $ (217)    
Allowance for Loan Losses Allocated 6,760     $ 20,771
Foreclosed assets 0     0
Loans Held for Sale        
Fair Value Measurements Of Financial Instruments [Line Items]        
Unpaid principal balance of loans held for sale 40,710     $ 42,152
Net loss on sale of loans held for investment $ 1,972   $ 1,010  
Minimum | Loans Held for Sale        
Fair Value Measurements Of Financial Instruments [Line Items]        
Term of loan 90 days 90 days