DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) settled_derivative	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 21, 2018 USD ($)	May 17, 2018 USD ($)
Derivative [Line Items]
Ineffective portion recorded in Other (loss) income, net		$ 700,000
Gain on unwinding of swaps	$ 16,104,000	0	$ 0
Fair value derivative liabilities	16,517,000	5,961,000
Interest rate swap contracts
Derivative [Line Items]
Loss reclassified from AOCI into earnings	$ 1,200,000
Agreements settled | settled_derivative	4
Credit Risk Contract
Derivative [Line Items]
Fair value derivative liabilities	$ 18,200,000	6,000,000
Designated as Hedging Instrument | Interest rate swap contracts
Derivative [Line Items]
Notional amount	250,000,000				$ 250,000,000
Gain on unwinding of swaps	15,800,000
Termination fee	$ 300,000
Change in fair value, recognition period	9 years
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months	$ 900,000
Accounts Payable and Accrued Liabilities | Designated as Hedging Instrument | Fixed Interest Rate 2.96%, Maturing October 2019 | Interest rate swap contracts
Derivative [Line Items]
Notional amount	18,926,000
Fair value derivative liabilities	0	$ 286,000
Prepaid Expenses and Other Current Assets | Designated as Hedging Instrument | Fixed Interest Rate 1.66%, Maturing May 2020 | Interest rate swap contracts
Derivative [Line Items]
Notional amount	$ 40,000,000			$ 40,000,000
Change in fair value, recognition period	1 year 3 months 18 days
Prepaid Expenses and Other Current Assets | Designated as Hedging Instrument | Fixed Interest Rate 1.14%, Maturing September 2021 | Interest rate swap contracts
Derivative [Line Items]
Notional amount	$ 119,359,000			$ 119,400,000
Change in fair value, recognition period	2 years 8 months 12 days