COMBINED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2014	Nov. 23, 2014	Dec. 31, 2015	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 72,722		$ 21,143
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	34,481		294,624
Unrealized (gain) loss on interest rate swaps	(15,084)		(75,760)
Straight-lining of rental income	(5,653)		(69,522)
Realized and unrealized (gains) losses on real estate fund investments	1,357		(21,201)
Amortization of below-market leases, net	(467)		(9,917)
Amortization of stock based compensation expense			7,309
Income from unconsolidated joint ventures	(938)		(6,850)
Other non-cash adjustments	1,368		5,824
Distributions of income from unconsolidated joint ventures	532		4,966
Amortization of deferred financing costs	240		2,565
Realized and unrealized losses (gains) on marketable securities	356		119
Defeasance cost in connection with the refinancing of notes and mortgages payable	14,990
Gain on consolidation of an unconsolidated joint venture	(239,716)
Stock-based compensation expense in connection with Founders Grants	71,000
Changes in operating assets and liabilities:
Restricted cash	6,502
Real estate fund investments	(51,362)		(127,743)
Accounts and other receivables	(150)		(3,152)
Deferred charges	(13,181)		(40,510)
Other assets	13,722		6,465
Accounts payable and accrued expenses	14,162		(6,152)
Deferred income taxes			(328)
Other liabilities	14,547		1,151
Net cash (used in) provided by operating activities	(80,572)		(16,969)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of, and additions to, rental properties	(6,143)		(107,859)
Change in restricted cash	18,556		12,424
Distributions of capital from unconsolidated joint ventures			19
Cash received from properties in connection with the formation transactions	192,500
Net cash (used in) provided by investing activities	204,913		(95,416)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from notes and mortgages payable			1,013,544
Repayment of notes and mortgages payable	(1,704,330)		(927,633)
Acquisition of noncontrolling interest in consolidated joint ventures			(261,464)
Contributions from noncontrolling interests	57,843		167,929
Dividends paid to common stockholders and unitholders			(85,458)
Distributions to noncontrolling interests	(8,488)		(56,636)
Settlement of swap liabilities	(14,130)		(33,741)
Proceeds from revolving credit facility			20,000
Debt issuance costs	(8,599)		(18,871)
Cash paid for equity interests in the formation transactions	(214,949)
Proceeds from the issuance of common stock	2,590,599
Purchase of marketable securities in connection with the defeasance of notes and mortgages payable	(435,774)
Net cash (used in) provided by financing activities	262,172		(182,330)
Net (decrease) increase in cash and cash equivalents	386,513		(294,715)
Cash and cash equivalents at beginning of period	52,086		438,599
Cash and cash equivalents at end of period	438,599	$ 52,086	143,884
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	23,728		159,186
Cash payments for income taxes, net of refunds			2,798
NON-CASH TRANSACTIONS:
Dividends and distributions declared but not yet paid			25,067
Additions to real estate included in accounts payable and accrued expenses	16,598		32,009
Change in value of interest rate swaps			9,241
(Purchases) sale of marketable securities	146		(1,481)
Write-off of fully amortized and/or depreciated assets			$ 1,399
Increase (decrease) in assets, liabilities and noncontrolling interests from the formation transactions:
Real estate, net	7,043,651
Real estate funds	(2,045,922)
Investment in unconsolidated joint ventures	(18,264)
Working capital, net of cash	26,784
Intangible assets	689,894
Notes and mortgages payable	4,261,903
Intangible liabilities	222,985
Preferred equity obligation	114,147
Profit sharing compensation payable	(57,296)
Interest rate swap liabilities	223,411
Marketable securities transferred in connection with the defeasance of notes and mortgages payable	435,774
Defeasance of notes and mortgages payable	(420,784)
Reduction of equity for deferred offering costs	31,284
Predecessor [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		109,398		$ 302,839
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization		10,203		10,582
Unrealized (gain) loss on interest rate swaps		673		(1,615)
Straight-lining of rental income		161		158
Realized and unrealized (gains) losses on real estate fund investments		(129,354)		(332,053)
Income from unconsolidated joint ventures		(4,241)		(1,062)
Other non-cash adjustments		7,303		4,221
Distributions of income from unconsolidated joint ventures		2,874		2,612
Amortization of deferred financing costs		389		434
Realized and unrealized losses (gains) on marketable securities		(1,706)		(5,532)
Changes in operating assets and liabilities:
Restricted cash		(8,271)		4,115
Real estate fund investments		(31,061)		13,436
Accounts and other receivables		(35,989)		(4,724)
Deferred charges		600		(600)
Other assets		311		3,510
Accounts payable and accrued expenses		(4,605)		7,712
Profit sharing payables		156		19,972
Deferred income taxes		(2,205)		2,701
Other liabilities		869		6,779
Net cash (used in) provided by operating activities		(84,495)		33,485
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of, and additions to, rental properties		(65,916)		(147)
Change in restricted cash		584		648
Distributions of capital from unconsolidated joint ventures		2,079		2,272
Purchase of marketable securities				(2,731)
Proceeds from repayment of loan to management		3,000		1,000
Investment in unconsolidated joint ventures		(4,077)
Net cash (used in) provided by investing activities		(64,330)		1,042
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of notes and mortgages payable		(2,827)		(17,635)
Contributions from noncontrolling interests		272,721		106,262
Distributions to noncontrolling interests		(266,028)		(6,643)
Contribution from Predecessor shareholders		23,688		5,359
Distributions to Predecessor shareholders		(149,135)		(120,599)
Proceeds from loans payable to noncontrolling interests		39,075
Offering costs		(23,744)		912
Net cash (used in) provided by financing activities		(106,250)		(32,344)
Net (decrease) increase in cash and cash equivalents		(255,075)		2,183
Cash and cash equivalents at beginning of period	$ 52,086	307,161		304,978
Cash and cash equivalents at end of period		52,086		307,161
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest		19,829		24,003
Cash payments for income taxes, net of refunds		18,998		$ 2,599
NON-CASH TRANSACTIONS:
(Purchases) sale of marketable securities		7,110
Write-off of fully amortized and/or depreciated assets		2,735
Increase (decrease) in assets, liabilities and noncontrolling interests from the formation transactions:
Debt assumed from affiliate		$ 27,299