CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 4,892	$ 1,078
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	208,475	223,658
Amortization of deferred financing costs	4,121	1,754
Straight-lining of rental income	(67,843)	(49,859)
Amortization of above and below-market leases, net	(6,593)	(3,239)
Unrealized gain on interest rate swaps	(29,661)	(49,497)
Realized and unrealized (gains) losses on marketable securities	(341)	1,087
Realized and unrealized gains, net, on real estate fund investments		(15,363)
Loss from unconsolidated real estate funds	2,540
Distributions of cumulative earnings from unconsolidated real estate funds	148
Income from unconsolidated joint ventures	(5,291)	(4,444)
Distributions of cumulative earnings from unconsolidated joint ventures	5,790	3,102
Amortization of stock-based compensation expense	8,766	6,224
Other non-cash adjustments	1,981	5,100
Changes in operating assets and liabilities:
Restricted cash		(11,290)
Real estate fund investments		2,357
Accounts and other receivables	(1,455)	(4,621)
Deferred charges	(11,266)	(18,754)
Other assets	(39,338)	(21,441)
Accounts payable and accrued expenses	(3,335)	(8,343)
Deferred income taxes	(2,979)	(301)
Other liabilities	1,343	1,008
Net cash provided by operating activities	69,954	58,216
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to rental properties	(107,445)	(68,484)
Deposit on rental property	(50,000)
Changes in restricted cash	11,380	(26,971)
Contributions to unconsolidated real estate funds	(1,084)
Distributions of capital from unconsolidated real estate funds	160
Distributions of capital from unconsolidated joint ventures	34	19
Net cash used in investing activities	(146,955)	(95,436)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from notes and mortgages payable	509,578
Repayments of notes and mortgages payable	(414,564)	(1,024)
Proceeds from revolving credit facility	110,000
Repayments of revolving credit facility	(80,000)
Dividends paid to common stockholders	(61,241)	(48,574)
Settlement of swap liabilities	(16,040)
Distributions paid to unitholders	(14,124)	(11,822)
Debt issuance costs	(6,532)
Distributions to noncontrolling interests	(2,692)	(54,975)
Contributions from noncontrolling interests		133,111
Net cash provided by financing activities	24,385	16,716
Net decrease in cash and cash equivalents	(52,616)	(20,504)
Cash and cash equivalents at beginning of period	143,884	438,599
Decrease in cash due to deconsolidation of real estate fund investments	(7,987)
Cash and cash equivalents at end of period	83,281	418,095
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	106,015	119,278
Cash payments for income taxes, net of refunds	1,524	1,968
(Decrease) increase due to deconsolidation of real estate fund investments:
Real estate fund investments	(416,438)
Loans payable to noncontrolling interests	(45,662)
Investments in unconsolidated real estate funds	27,292
Noncontrolling interests in consolidated real estate funds	(351,035)
Dividends and distributions declared but not yet paid	25,151	25,066
Change in fair value of interest rate swaps	33,812	18,602
Common shares issued upon redemption of common units	126,142
Additions to real estate included in accounts payable and accrued expenses	6,609	12,028
Purchases of marketable securities using restricted cash	139	1,293
Write-off of fully amortized and/or depreciated assets	$ 8,475	$ 889