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DERIVATIVES - Gains and Losses Related to Derivative Financial Instruments Not Designated as Hedging Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mark to market loss on interest rate derivatives | Interest rate swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Gains (losses) on derivative financial instruments not designated as hedging instruments $ (2,266) $ 0