Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income (loss)		$ 630,356	$ 730,961
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and amortization		683,262	673,326
Other amortization expenses		12,095	5,419
Asset Impairment Charges		24,662	24,019
Stock-based compensation expense		16,459	20,618
Loss (gain) on derivatives, net		2,284	(2,516)
Loss (gain) on extinguishment of debt, net		36,870	9
Income from unconsolidated entities		23,676	7,528
Rental income in excess of cash received		(64,865)	(60,212)
Amortization related to above (below) market leases, net		180	362
Net loss (gain) on sales of properties		(287,869)	(163,881)
Distributions by unconsolidated entities		116	473
Increase (decrease) in accrued expenses and other liabilities		171,713	79,619
Decrease (increase) in receivables and other assets		(86,475)	(35,557)
Net cash provided from (used in) operating activities		1,162,464	1,280,168
Investing activities
Cash disbursed for acquisitions		(575,694)	(1,448,126)
Cash disbursed for capital improvements to existing properties		(159,142)	(141,200)
Cash disbursed for construction in progress		(198,068)	(325,372)
Capitalized interest		(10,033)	(12,109)
Investment in real estate loans receivable		(70,051)	(105,496)
Other investments, net of payments		50,877	(88,398)
Principal collected on real estate loans receivable		82,263	225,092
Contributions to unconsolidated entities		(73,802)	(41,747)
Distributions by unconsolidated entities		58,754	72,564
Proceeds from (payments on) derivatives investing		55,771	56,842
Decrease (increase) in restricted cash		130,470	(21,218)
Proceeds from sales of real property		1,237,851	538,032
Net cash provided from (used in) investing activities		529,196	(1,291,136)
Financing activities
Net increase (decrease) under unsecured lines of credit arrangements		(225,000)	515,000
Proceeds from issuance of senior unsecured notes		7,500	693,560
Payments to extinguish senior unsecured notes		(5,000)	(400,000)
Net proceeds from the issuance of secured debt		190,459	193,541
Payments on secured debt		(1,050,879)	(471,898)
Net proceeds from the issuance of common stock		530,992	520,067
Redemption of preferred stock		(287,500)	0
Decrease (increase) in deferred loan costs		(54,027)	(18,831)
Contributions by noncontrolling interests	[1]	47,209	142,381
Distributions to noncontrolling interests	[1]	(51,824)	(106,076)
Cash distributions to stockholders		(992,621)	(970,436)
Other financing activities		(8,416)	(8,941)
Net cash provided from (used in) financing activities		(1,899,107)	88,367
Effect of foreign currency translation on cash and cash equivalents		24,316	(9,690)
Increase (decrease) in cash and cash equivalents		(183,131)	67,709
Cash and cash equivalents at beginning of period		419,378	360,908
Cash and cash equivalents at end of period		236,247	428,617
Supplemental cash flow information:
Interest paid		312,896	360,421
Income taxes paid		$ 5,606	$ 7,070

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