COMBINED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Earnings (Less than) In Excess of Distributions [Member]	Accumulated Other Comprehensive Loss [Member]	Predecessor Shareholders' Equity [Member]	Noncontrolling Interest [Member] Consolidated Joint Ventures and Funds [Member]	Noncontrolling Interest [Member] Operating Partnership [Member]
Beginning balance (Predecessor [Member]) at Dec. 31, 2013	$ 2,025,444					$ 321,769	$ 1,703,675
Net income | Predecessor [Member]	108,859					22,478	86,381
Contributions | Predecessor [Member]	223,000					9,188	213,812
Distributions | Predecessor [Member]	(192,488)					(53,206)	(139,282)
Ending balance (Predecessor [Member]) at Sep. 30, 2014	$ 2,164,815					$ 300,229	1,864,586
Common stock, shares outstanding at Dec. 31, 2014	212,106,718	212,107,000
Net income	$ 1,078			$ (13,324)			17,641	$ (3,239)
Common stock, shares outstanding at Sep. 30, 2015	212,111,937	212,112,000
Beginning balance at Dec. 31, 2014	$ 5,554,953	$ 2,122	$ 3,851,432	57,308			685,888	958,203
Common shares issued under Omnibus share plan		5,000
Common units issued under Omnibus share plan			(2,131)					2,131
Dividends and distributions	(85,462)			(68,724)				(16,738)
Contributions from noncontrolling interests	133,111						133,111
Distributions to noncontrolling interests	(54,975)						(54,975)
Change in value of interest rate swaps	(18,602)				$ (14,959)			(3,643)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	(535)				(430)			(105)
Adjustments to noncontrolling interests			43,981					(43,981)
Amortization of equity awards	6,224		1,172					5,052
Other	(926)		(470)	(134)			(322)
Ending balance at Sep. 30, 2015	$ 5,534,866	$ 2,122	$ 3,893,984	$ (24,874)	$ (15,389)		$ 781,343	$ 897,680