DEBT - Schedule of Maturities of Debt (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) extension_option	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
2019	$ 3,421
2020	203,530
2021	1,142,130
2022	994,885
2023	203,282
Thereafter	685,916
Total Debt	3,233,164
Premium, net	14,500
Deferred financing costs, net	(15,661)
Total Debt, Net	3,232,003
Secured Indebtedness
Debt Instrument [Line Items]
2019	3,421
2020	3,530
2021	18,130
2022	3,185
2023	3,282
Thereafter	85,916
Total Debt	117,464
Premium, net	0
Deferred financing costs, net	(1,785)	$ (2,800)
Total Debt, Net	115,679
Revolving Credit Facility
Debt Instrument [Line Items]
2019	0
2020	0
2021	624,000
2022	0
2023	0
Thereafter	0
Total Debt	624,000
Premium, net	0
Deferred financing costs, net	0
Total Debt, Net	624,000
Term Loans
Debt Instrument [Line Items]
2019	0
2020	200,000
2021	0
2022	991,700
2023	0
Thereafter	0
Total Debt	1,191,700
Premium, net	0
Deferred financing costs, net	(6,770)
Total Debt, Net	1,184,930
Senior Notes
Debt Instrument [Line Items]
2019	0
2020	0
2021	500,000
2022	0
2023	200,000
Thereafter	600,000
Total Debt	1,300,000
Premium, net	14,500
Deferred financing costs, net	(7,106)	$ (9,600)
Total Debt, Net	$ 1,307,394
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