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DERIVATIVE FINANCIAL INSTRUMENTS - Narratives (Details) - USD ($)
Sep. 30, 2020
Jul. 01, 2020
Derivative Financial Instruments    
Asset Derivatives, Fair Value   $ 7,932,000
Liability Derivatives, Fair Value   $ 7,932,000
Asset pledged    
Derivative Financial Instruments    
Available-for-sale securities pledged as collateral $ 12,226,000  
Interest rate swap agreements    
Derivative Financial Instruments    
Asset Derivatives, Notional Amount 68,310,000  
Asset Derivatives, Fair Value 7,478,000  
Liability Derivatives, Notional Amount 68,310,000  
Liability Derivatives, Fair Value $ 7,478,000