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DERIVATIVES FINANCIAL INSTRUMENTS - Narrative (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
USD ($)
derivativeInstrument
bank
customer
Dec. 31, 2020
USD ($)
bank
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash collateral held by counterparty for derivatives $ 690  
Interest rate derivative    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Number of derivatives | bank   1
Derivative, notional amount $ 50,000  
Interest rate derivative | Designated as hedging instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Number of derivatives | bank 1  
Interest rate derivative | Derivatives not designated as hedging instruments:    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Number of derivatives | derivativeInstrument 3  
Derivative, notional amount $ 60,900 $ 61,300
Number of customers | customer 3  
Interest rate derivative | Derivatives not designated as hedging instruments: | Agent Bank    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Upfront fee from derivative $ 53  
Loss on derivative 4  
Interest rate derivative | Derivatives not designated as hedging instruments: | Other liabilities    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative liabilities 30,467 $ 30,673
Interest rate derivative | Derivatives not designated as hedging instruments: | Other liabilities | Agent Bank    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative liabilities $ 15,900