DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Summary of the Notional Amount and Fair Value of Derivatives) (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 21, 2018
Fair value of derivative instruments
Total fair value derivative assets	$ 0	$ 0	$ 346,000
Total fair value derivative liabilities	(40,848,000)	(40,848,000)	(16,517,000)
Interest income	0	200,000	200,000
Interest Rate Cap | Derivative instruments designated as hedging instruments
Fair value of derivative instruments
Notional amount	230,000,000.0	230,000,000.0
Interest Rate Cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net | Fixed Interest Rate 5.0 Maturing August 2019
Fair value of derivative instruments
Notional amount	$ 75,000,000	$ 75,000,000
Fixed interest rate	5.00%	5.00%
Total fair value derivative assets	$ 0	$ 0	0
Interest Rate Cap | Derivative instruments not designated as hedging instruments | Prepaid expenses and other assets, net | Fixed Interest Rate 2.50%, Maturing December 2019
Fair value of derivative instruments
Notional amount	$ 230,000,000	$ 230,000,000
Fixed interest rate	2.50%	2.50%
Total fair value derivative assets	$ 0	$ 0	333,000
Interest Rate Collar | Derivative instruments designated as hedging instruments | Prepaid expenses and other assets, net | Fixed Interest Rate 1.50% To 2.50%, Maturing May 2019
Fair value of derivative instruments
Notional amount	51,592,000	51,592,000
Total fair value derivative assets	0	0	13,000
Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.00% To 3.00%, Maturing May 2020
Fair value of derivative instruments
Notional amount, liability	193,967,000	193,967,000
Total fair value derivative liabilities	(276,000)	(276,000)	(37,000)
Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.25% To 3.25%, Maturing May 2021
Fair value of derivative instruments
Notional amount, liability	354,217,000	354,217,000
Total fair value derivative liabilities	(2,275,000)	(2,275,000)	(730,000)
Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.75% To 3.50%, Maturing April 2022
Fair value of derivative instruments
Notional amount, liability	381,404,000	381,404,000
Total fair value derivative liabilities	(4,415,000)	(4,415,000)	(1,969,000)
Interest rate derivatives | Derivative instruments designated as hedging instruments
Fair value of derivative instruments
Notional amount			250,000,000.0
Interest rate derivatives | Derivative instruments designated as hedging instruments | Prepaid expenses and other assets, net | Fixed Interest Rate 4.89% Maturing January 2032
Fair value of derivative instruments
Notional amount	$ 1,810,000	$ 1,810,000
Fixed interest rate	4.89%	4.89%
Total fair value derivative assets	$ (1,676,000)	$ (1,676,000)	0
Interest rate derivatives | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.96%, Maturing September 2023
Fair value of derivative instruments
Notional amount, liability	$ 615,000,000	$ 615,000,000
Fixed interest rate	2.96%	2.96%
Total fair value derivative liabilities	$ (32,206,000)	$ (32,206,000)	$ (13,781,000)
Minimum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Prepaid expenses and other assets, net | Fixed Interest Rate 1.50% To 2.50%, Maturing May 2019
Fair value of derivative instruments
Fixed interest rate	1.50%	1.50%
Minimum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.00% To 3.00%, Maturing May 2020
Fair value of derivative instruments
Fixed interest rate	2.00%	2.00%
Minimum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.25% To 3.25%, Maturing May 2021
Fair value of derivative instruments
Fixed interest rate	2.25%	2.25%
Minimum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.75% To 3.50%, Maturing April 2022
Fair value of derivative instruments
Fixed interest rate	2.75%	2.75%
Maximum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Prepaid expenses and other assets, net | Fixed Interest Rate 1.50% To 2.50%, Maturing May 2019
Fair value of derivative instruments
Fixed interest rate	2.50%	2.50%
Maximum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.00% To 3.00%, Maturing May 2020
Fair value of derivative instruments
Fixed interest rate	3.00%	3.00%
Maximum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.25% To 3.25%, Maturing May 2021
Fair value of derivative instruments
Fixed interest rate	3.25%	3.25%
Maximum | Interest Rate Collar | Derivative instruments designated as hedging instruments | Accounts payable and accrued expenses | Fixed Interest Rate 2.75% To 3.50%, Maturing April 2022
Fair value of derivative instruments
Fixed interest rate	3.50%	3.50%
Term Loan | $700 Million Loan Maturity September 2023
Fair value of derivative instruments
Loan amount				$ 615,000,000.0