Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Operating activities
Net income (loss)		$ 541,052	$ 376,223
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and amortization		453,124	455,265
Other amortization expenses		7,789	3,141
Asset Impairment Charges		24,662	14,314
Stock-based compensation expense		9,669	15,217
Loss (gain) on derivatives, net		1,960	0
Loss (gain) on extinguishment of debt, net		36,870	9
Income from unconsolidated entities		27,084	5,778
Rental income in excess of cash received		(41,325)	(54,055)
Amortization related to above (below) market leases, net		48	332
Net loss (gain) on sales of properties		(286,247)	(1,530)
Distributions by unconsolidated entities		3,225	351
Increase (decrease) in accrued expenses and other liabilities		70,005	43,621
Decrease (increase) in receivables and other assets		(3,807)	(3,009)
Net cash provided from (used in) operating activities		844,109	855,657
Investing activities
Cash disbursed for acquisitions		(237,119)	(287,455)
Cash disbursed for capital improvements to existing properties		(93,147)	(87,529)
Cash disbursed for construction in progress		(149,046)	(249,867)
Capitalized interest		(7,488)	(7,343)
Investment in real estate loans receivable		(50,717)	(51,059)
Other investments, net of payments		52,457	(16,664)
Principal collected on real estate loans receivable		36,500	168,343
Contributions to unconsolidated entities		(65,631)	(39,644)
Distributions by unconsolidated entities		47,384	19,301
Proceeds from (payments on) derivatives investing		19,665	56,842
Decrease (increase) in restricted cash		142,485	3,342
Proceeds from sales of real property		1,203,782	130,298
Net cash provided from (used in) investing activities		899,125	(361,435)
Financing activities
Net increase (decrease) under unsecured lines of credit arrangements		(260,000)	(90,000)
Proceeds from issuance of senior unsecured notes		0	693,560
Payments to extinguish senior unsecured notes		0	(400,000)
Secured debt issued		161,799	161,992
Payments on secured debt		(1,020,129)	(281,051)
Net proceeds from the issuance of common stock		424,451	159,032
Redemption of preferred stock		(287,500)	0
Decrease (increase) in deferred loan costs		(52,838)	(17,439)
Contributions by noncontrolling interests	[1]	9,663	138,458
Distributions to noncontrolling interests	[1]	(38,143)	(91,133)
Cash distributions to stockholders		(660,355)	(645,866)
Other financing activities		(8,925)	(7,646)
Net cash provided from (used in) financing activities		(1,731,977)	(380,093)
Effect of foreign currency translation on cash and cash equivalents		11,649	(8,452)
Increase (decrease) in cash and cash equivalents		22,906	105,677
Cash and cash equivalents at beginning of period		419,378	360,908
Cash and cash equivalents at end of period		442,284	466,585
Supplemental cash flow information:
Interest paid		210,184	236,861
Income taxes paid		$ 4,360	$ 3,889

[1] (1) Includes amounts attributable to redeemable noncontrolling interests.