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FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Additional Information (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Fair Value Disclosures [Abstract]    
Commitments of lending operations $ 0 $ 0
Swap Guarantee    
Derivative [Line Items]    
Derivative liability $ 12,200,000 $ 8,800,000