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DERIVATIVES - Gains and Losses Related to Derivative Financial Instruments Designated as Hedging Instruments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative fair value adjustment $ 1,003 $ 147 $ 17
Derivatives designated as hedging instruments      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative fair value adjustment 1,003 161 17
Derivatives designated as hedging instruments | Interest rate swaps      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative fair value adjustment 1,120 161 17
Derivatives designated as hedging instruments | Foreign exchange contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative fair value adjustment $ (117) $ 0 $ 0