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DERIVATIVE AND HEDGING INSTRUMENTS - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2019
USD ($)
derivative
Sep. 30, 2019
USD ($)
derivative
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
derivative
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Derivative [Line Items]            
Interest expense   $ 29,255,000 $ 37,305,000 $ 99,181,000 $ 109,880,000  
Fair value of derivatives in a net liability position   7,478,000   7,478,000   $ 4,529,000
Forward Starting Interest Rate Swaps            
Derivative [Line Items]            
Number of derivative contracts terminated | derivative 3          
Payment to counterparties upon termination of derivatives $ 12,600,000          
Credit Risk            
Derivative [Line Items]            
Fair value of derivatives in a net liability position   3,600,000   3,600,000    
Termination value   3,400,000   3,400,000    
Cash Flow Hedges | Interest Rate Swap            
Derivative [Line Items]            
Ineffectiveness on cash flow hedges   0   0    
Ineffectiveness on cash flow hedges     0   0  
Designated as Hedging Instrument            
Derivative [Line Items]            
Fair value of derivatives in a net liability position   $ 101,878,000   101,878,000   $ 96,229,000
Designated as Hedging Instrument | Cash Flow Hedges            
Derivative [Line Items]            
Gains included in accumulated other comprehensive loss which are expected to be reclassified into earnings in the next 12 months       $ 1,400,000    
Not Designated as Hedging Instrument | Cross Currency Interest Rate Swaps            
Derivative [Line Items]            
Number of derivative instruments held | derivative   1   1    
Fair value of derivative asset   $ 118,000   $ 118,000    
Other income related to derivatives   $ 38,000   $ 31,000    
Other expense related to derivatives     $ 11,000   $ 11,000