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DERIVATIVE INSTRUMENTS - Fair Value of Derivative Instruments By Balance Sheet Location (Details) - USD ($)
 9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Expected reduction to notional amount in June 2019 $ 150,000,000  
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Assets 34,531,000 $ 11,769,000
Derivatives designated as hedges — Liabilities 14,466,000 15,134,000
Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Notional amount 1,050,000,000 1,050,000,000
Interest Rate Swap | Designated as Hedging Instrument | Prepaid expenses and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Assets 6,682,000 1,521,000
Interest Rate Swap | Designated as Hedging Instrument | Other assets    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Assets 20,246,000 2,491,000
Interest Rate Swap | Designated as Hedging Instrument | Accrued expenses and other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Liabilities 0 1,845,000
Interest Rate Swap | Designated as Hedging Instrument | Other liabilities    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Liabilities 0 1,575,000
Cross-currency swap | Designated as Hedging Instrument | Prepaid expenses and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Assets 7,603,000 7,757,000
Cross-currency swap | Designated as Hedging Instrument | Other liabilities    
Derivatives, Fair Value [Line Items]    
Derivatives designated as hedges — Liabilities $ 14,466,000 $ 11,714,000