CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 439,297	$ 415,981	$ 1,361,112
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,045,620	919,639	887,948
Amortization of deferred revenue and lease intangibles, net	(7,967)	(30,660)	(20,537)
Other non-cash amortization	22,985	18,886	16,058
Stock-based compensation	33,923	29,963	26,543
Straight-lining of rental income	(30,073)	13,396	(23,134)
Loss on extinguishment of debt, net	41,900	58,254	754
Gain on real estate dispositions	(26,022)	(46,247)	(717,273)
Gain on real estate loan investments	0	(13,202)	(124)
Income tax benefit	(58,918)	(43,026)	(63,599)
Loss from unconsolidated entities	2,464	55,034	3,588
Gain on re-measurement of equity interest upon acquisition, net	0	0	(3,027)
Distributions from unconsolidated entities	1,600	2,934	4,676
Real estate impairments related to natural disasters	0	52,510	4,616
Other	13,264	3,720	4,624
Changes in operating assets and liabilities:
Increase in other assets	(76,693)	(23,198)	(29,282)
Increase in accrued interest	9,737	4,992	11,068
Increase (decrease) in accounts payable and other liabilities	26,666	(37,509)	(35,259)
Net cash provided by operating activities	1,437,783	1,381,467	1,428,752
Cash flows from investing activities:
Net investment in real estate property	(958,125)	(265,907)	(664,684)
Investment in loans receivable	(1,258,187)	(229,534)	(748,119)
Proceeds from real estate disposals	147,855	353,792	859,874
Proceeds from loans receivable	1,017,309	911,540	101,097
Development project expenditures	(403,923)	(330,876)	(299,085)
Capital expenditures	(156,724)	(131,858)	(132,558)
Distributions from unconsolidated entities	172	57,455	6,169
Investment in unconsolidated entities	(3,855)	(47,007)	(61,220)
Insurance proceeds for property damage claims	30,179	6,891	1,419
Net cash provided by (used in) investing activities	(1,585,299)	324,496	(937,107)
Cash flows from financing activities:
Net change in borrowings under revolving credit facilities	(569,891)	321,463	384,783
Net change in borrowings under commercial paper program	565,524	0	0
Proceeds from debt	3,013,191	2,549,473	1,111,649
Repayment of debt	(2,623,916)	(3,465,579)	(1,369,084)
Purchase of noncontrolling interests	0	(4,724)	(15,809)
Payment of deferred financing costs	(21,403)	(20,612)	(27,297)
Issuance of common stock, net	942,085	0	73,596
Cash distribution to common stockholders	(1,157,720)	(1,127,143)	(827,285)
Cash distribution to redeemable OP unitholders	(9,218)	(7,459)	(5,677)
Cash issued for redemption of OP Units	(2,203)	(1,370)	0
Contributions from noncontrolling interests	6,282	1,883	4,402
Distributions to noncontrolling interests	(9,717)	(11,574)	(11,187)
Proceeds from stock option exercises	36,179	8,762	16,287
Other	(8,519)	(5,057)	(5,705)
Net cash provided by (used in) financing activities	160,674	(1,761,937)	(671,327)
Net increase (decrease) in cash, cash equivalents and restricted cash	13,158	(55,974)	(179,682)
Effect of foreign currency translation	1,480	(815)	581
Cash, cash equivalents and restricted cash at beginning of period	131,464	188,253	367,354
Cash, cash equivalents and restricted cash, end of period	146,102	131,464	188,253
Supplemental disclosure of cash flow information:
Interest paid including swap payments and receipts	410,584	406,907	409,890
Assets acquired and liabilities assumed from acquisitions and other:
Real estate investments	1,057,138	94,280	425,906
Other assets	11,140	5,398	(3,716)
Debt	907,746	30,508	75,231
Other liabilities	47,121	18,086	70,878
Deferred income tax liability	95	922	(14,869)
Noncontrolling interests	113,316	2,591	4,202
Equity issued	0	30,487	0
Equity issued for redemption of OP Units	$ 127	$ 907	$ 24,002