EQUITY - Summary of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ 1,053,876	$ 941,823	$ 460,164	$ 305,488
Foreign currency translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(1,400)	0
Unrealized losses on cash flow hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(5,900)	(1,500)
Total accumulated other comprehensive loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (7,333)	$ (1,542)	$ 0	$ 0