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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
swap
Dec. 31, 2018
USD ($)
Aug. 13, 2015
USD ($)
swap
Derivative [Line Items]        
Number of swaps terminated | swap   2    
Notional amount of terminated swaps   $ 120,000    
Proceeds from termination payments, net of fees   1,300    
Reclassification from AOCI to interest expense $ 0 1,806 $ 1,552  
Write-off of terminated interest rate swaps   1,600    
Change in fair value of swaps $ 0 (209) (1,728)  
Interest Expense        
Derivative [Line Items]        
Change in fair value of swaps   209 $ 1,700  
Interest Rate Swap        
Derivative [Line Items]        
Number of interest rate swaps | swap       10
Derivative, notional amount       $ 385,000
Derivative, fair value   1,400    
Derivative, gain (loss) on derivative, net   $ (119)