COMBINED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,078
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	223,658
Unrealized (gains) losses on interest rate swaps	(49,497)
Straight-lining of rental income	(49,859)
Realized and unrealized gains, net, on real estate fund investments	(15,363)
Income from unconsolidated joint ventures	(4,444)
Distributions of income from unconsolidated joint ventures	3,102
Amortization of above and below-market leases, net	(3,239)
Amortization of deferred financing costs	1,754
Realized and unrealized losses (gains) on marketable securities	1,087
Non-cash stock based compensation expense	6,224
Other non-cash adjustments	5,100
Changes in operating assets and liabilities:
Restricted cash	(11,290)
Real estate fund investments	2,357
Accounts and other receivables	(4,621)
Deferred charges	(18,754)
Other assets	(21,441)
Accounts payable and accrued expenses	(8,343)
Deferred income taxes	(301)
Other liabilities	1,008
Net cash provided by (used in) operating activities	58,216
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of, and additions to, rental properties	(68,484)
Changes in restricted cash	(26,971)
Distributions of capital from unconsolidated joint ventures	19
Net cash used in investing activities	(95,436)
CASH FLOWS FROM FINANCING ACTIVITIES:
Contributions from noncontrolling interests	133,111
Dividends paid to common shareholders and unitholders	(60,396)
Distributions to noncontrolling interests	(54,975)
Repayment of mortgage notes and loans payable	(1,024)
Net cash (used in) provided by financing activities	16,716
Net decrease in cash and cash equivalents	(20,504)
Cash and cash equivalents at beginning of period	438,599
Cash and cash equivalents at end of period	418,095
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	119,278
Cash payments for income taxes, net of refunds	1,968
NON-CASH TRANSACTIONS:
Dividends and distributions declared but not yet paid	25,066
Change in value of forward interest rate swap	18,602
Additions to real estate included in accounts payable and accrued expenses	12,028
(Purchases) sale of marketable securities	$ (1,293)
Predecessor [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 108,859
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization		8,548
Unrealized (gains) losses on interest rate swaps		673
Straight-lining of rental income		135
Realized and unrealized gains, net, on real estate fund investments		(123,150)
Income from unconsolidated joint ventures		(3,812)
Distributions of income from unconsolidated joint ventures		2,039
Amortization of deferred financing costs		325
Realized and unrealized losses (gains) on marketable securities		(1,082)
Other non-cash adjustments		5,371
Changes in operating assets and liabilities:
Restricted cash		(2,214)
Real estate fund investments		(34,515)
Accounts and other receivables		(12,377)
Deferred charges		600
Other assets		(980)
Accounts payable and accrued expenses		(2,523)
Profit sharing payable		(2,689)
Deferred income taxes		15,904
Other liabilities		6
Net cash provided by (used in) operating activities		(40,882)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of, and additions to, rental properties		(65,637)
Changes in restricted cash		(12)
Distributions of capital from unconsolidated joint ventures		1,329
Net cash used in investing activities		(64,320)
CASH FLOWS FROM FINANCING ACTIVITIES:
Contributions from noncontrolling interests		213,812
Dividends paid to common shareholders and unitholders		(53,206)
Distributions to noncontrolling interests		(139,282)
Repayment of mortgage notes and loans payable		(1,877)
Contributions from Predecessor shareholders		9,188
Proceeds from loans payable to noncontrolling interests		39,075
Offering costs		(15,063)
Net cash (used in) provided by financing activities		52,647
Net decrease in cash and cash equivalents		(52,555)
Cash and cash equivalents at beginning of period		307,161
Cash and cash equivalents at end of period		254,606
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest		17,000
Cash payments for income taxes, net of refunds		6,039
NON-CASH TRANSACTIONS:
(Purchases) sale of marketable securities		$ 6,681