DEBT - Schedule of Maturities for Outstanding Debt (Details) $ in Thousands	Aug. 17, 2017 extension_option	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
July 1 through December 31, 2019		$ 1,735
2020		203,552
2021		293,751
2022		998,672
2023		203,282
Thereafter		985,916
Total Debt		2,686,908
Premium, net		13,980
Deferred financing costs, net		(14,921)
Total Debt, Net		2,685,967
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Number of extension options | extension_option	2
Extension period	6 months
Secured Indebtedness
Debt Instrument [Line Items]
July 1 through December 31, 2019		1,735
2020		3,552
2021		18,751
2022		3,185
2023		3,282
Thereafter		85,916
Total Debt		116,421
Premium, net		0
Deferred financing costs, net		(1,746)	$ (1,800)
Total Debt, Net		114,675
Revolving Credit Facility
Debt Instrument [Line Items]
July 1 through December 31, 2019		0
2020		0
2021		275,000
2022		0
2023		0
Thereafter		0
Total Debt		275,000
Premium, net		0
Deferred financing costs, net		0
Total Debt, Net		275,000
Term Loans
Debt Instrument [Line Items]
July 1 through December 31, 2019		0
2020		200,000
2021		0
2022		995,487
2023		0
Thereafter		0
Total Debt		1,195,487
Premium, net		0
Deferred financing costs, net		(5,713)
Total Debt, Net		1,189,774
Senior Notes
Debt Instrument [Line Items]
July 1 through December 31, 2019		0
2020		0
2021		0
2022		0
2023		200,000
Thereafter		900,000
Total Debt		1,100,000
Premium, net		13,980	14,500
Deferred financing costs, net		(7,462)	$ (7,100)
Total Debt, Net		$ 1,106,518