DEBT - Schedule of Maturities of Debt (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) extension_option	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
2018	$ 4,301
2019	102,945
2020	204,594
2021	1,161,482
2022	1,003,872
Thereafter	922,595
Total Debt	3,399,789
Premium, net	15,915
Deferred financing costs, net	(21,214)
Total Debt, Net	3,394,490
Secured Indebtedness
Debt Instrument [Line Items]
2018	4,301
2019	102,945
2020	4,594
2021	20,482
2022	4,285
Thereafter	122,595
Total Debt	259,202
Premium, net	0
Deferred financing costs, net	(2,772)	$ (2,900)
Total Debt, Net	256,430
Revolving Credit Facility
Debt Instrument [Line Items]
2018	0
2019	0
2020	0
2021	641,000
2022	0
Thereafter	0
Total Debt	641,000
Premium, net	0
Deferred financing costs, net	0
Total Debt, Net	641,000
Term Loans
Debt Instrument [Line Items]
2018	0
2019	0
2020	200,000
2021	0
2022	999,587
Thereafter	0
Total Debt	1,199,587
Premium, net	0
Deferred financing costs, net	(8,813)
Total Debt, Net	1,190,774
Senior Notes
Debt Instrument [Line Items]
2018	0
2019	0
2020	0
2021	500,000
2022	0
Thereafter	800,000
Total Debt	1,300,000
Premium, net	15,915
Deferred financing costs, net	(9,629)	$ (11,200)
Total Debt, Net	$ 1,306,286
Fourth Amended and Restated Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Optional extension period	6 months
Number of optional extensions | extension_option	2