Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017
Operating activities:
Net income	$ 705,054		$ 630,356
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and amortization	707,625		683,262
Other amortization expenses	12,110		12,095
Impairment of assets	39,557		24,662
Stock-based compensation expense	22,800		16,459
Loss (gain) on derivatives and financial instruments, net	(5,642)		2,284
Loss (gain) on extinguishment of debt, net	16,044		36,870
Loss (income) from unconsolidated entities	836		23,676
Rental income less than (in excess of) cash received	(7,830)		(64,865)
Amortization related to above (below) market leases, net	1,984		180
Loss (gain) on real estate dispositions, net	(373,662)		(287,869)
Distributions by unconsolidated entities	21		116
Increase (decrease) in accrued expenses and other liabilities	103,474		171,713
Decrease (increase) in receivables and other assets	(11,223)		(86,475)
Net cash provided from (used in) operating activities	1,211,148		1,162,464
Investing activities:
Cash disbursed for acquisitions	(3,190,534)		(574,002)
Cash disbursed for capital improvements to existing properties	(173,635)		(159,142)
Cash disbursed for construction in progress	(88,146)		(198,068)
Capitalized interest	(6,357)		(10,033)
Investment in real estate loans receivable	(67,136)		(70,051)
Principal collected on real estate loans receivable	149,592		82,263
Other investments, net of payments	(49,572)		50,877
Contributions to unconsolidated entities	(42,697)		(73,802)
Distributions by unconsolidated entities	61,253		58,754
Proceeds from (payments on) derivatives	65,438		55,771
Proceeds from sales of real property	1,208,501		1,237,851
Net cash provided from (used in) investing activities	(2,133,293)		400,418
Financing activities:
Net increase (decrease) under unsecured credit facilities	593,000		(225,000)
Proceeds from issuance of senior unsecured notes	2,825,898		7,500
Payments to extinguish senior unsecured notes	(1,450,000)		(5,000)
Net proceeds from the issuance of secured debt	44,606		190,459
Payments on secured debt	(238,867)		(1,050,879)
Net proceeds from the issuance of common stock	242,411		530,992
Redemption of preferred stock	0		(287,500)
Payments for deferred financing costs and prepayment penalties	(29,701)		(54,027)
Contributions by noncontrolling interests(1)	11,238	[1]	47,209
Distributions to noncontrolling interests(1)	(86,462)	[1]	(51,824)
Cash distributions to stockholders	(1,006,274)		(992,621)
Other financing activities	(6,290)		(8,416)
Net cash provided from (used in) financing activities	899,559		(1,899,107)
Effect of foreign currency translation on cash, cash equivalents and restricted cash	(5,432)		24,316
Increase (decrease) in cash, cash equivalents and restricted cash	(28,018)		(311,909)
Cash, cash equivalents and restricted cash at beginning of period	309,303		607,220
Cash, cash equivalents and restricted cash at end of period	281,285		295,311
Supplemental cash flow information:
Interest paid	312,452		312,896
Income taxes paid (received), net	$ 3,195		$ 5,606

[1] Includes amounts attributable to redeemable noncontrolling interests.