EQUITY - Summary of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	$ 3,254,747	$ 3,437,249	$ 1,015,609	$ 1,053,876
Total accumulated other comprehensive loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	12,301	11,289	$ (1,798)	$ (7,333)
Foreign currency translation loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	(2,193)	(2,913)
Unrealized gains on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	$ 14,494
Unrealized gains on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity		$ 14,202