Accumulated Other Comprehensive Income ("AOCI") - Summary of Other Comprehensive Income and Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance				$ 3,761,017
Ending balance		$ 3,808,073		3,808,073
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(31,815)		(7,843)
OCI before reclassifications	[1]	(9,683)	$ (493)	(33,655)	$ (493)
Net current period OCI		(9,683)	(493)	(33,655)	(493)
Ending balance		(41,498)	(493)	(41,498)	(493)
Pro Rata Share of OCI of Unconsolidated Joint Ventures [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(326)		(412)
OCI before reclassifications	[1]	(36)	(493)	50	(493)
Net current period OCI		(36)	(493)	50	(493)
Ending balance		(362)	$ (493)	(362)	$ (493)
Change in Value of Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(31,489)		(7,431)
OCI before reclassifications	[1]	(9,647)		(33,705)
Net current period OCI		(9,647)		(33,705)
Ending balance		$ (41,136)		$ (41,136)

[1] Net of amount attributable to the noncontrolling interests in the Operating Partnership.