CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 415,981	$ 1,361,112	$ 651,490
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	919,639	887,948	898,924
Amortization of deferred revenue and lease intangibles, net	(30,660)	(20,537)	(20,336)
Other non-cash amortization	18,886	16,058	10,357
Stock-based compensation	29,963	26,543	20,958
Straight-lining of rental income, net	13,396	(23,134)	(27,988)
Loss on extinguishment of debt, net	58,254	754	2,779
Gain on real estate dispositions	(46,247)	(717,273)	(98,203)
Gain on real estate loan investments	(13,202)	(124)	(2,271)
Income tax benefit	(43,026)	(63,599)	(34,227)
Loss (income) from unconsolidated entities	55,034	3,588	(4,358)
Gain on re-measurement of equity interest upon acquisition, net	0	(3,027)	0
Distributions from unconsolidated entities	2,934	4,676	7,598
Real estate impairments related to natural disasters	52,510	4,616	0
Other	3,720	4,624	(1,847)
Changes in operating assets and liabilities:
Increase in other assets	(23,198)	(29,282)	(12,079)
Increase in accrued interest	4,992	11,068	2,604
Decrease in accounts payable and other liabilities	(37,509)	(35,259)	(38,699)
Net cash provided by operating activities	1,381,467	1,428,752	1,354,702
Cash flows from investing activities:
Net investment in real estate property	(265,907)	(664,684)	(1,413,595)
Investment in loans receivable	(229,534)	(748,119)	(158,635)
Proceeds from real estate disposals	353,792	859,874	300,561
Proceeds from loans receivable	911,540	101,097	320,082
Development project expenditures	(330,876)	(299,085)	(143,647)
Capital expenditures	(131,858)	(132,558)	(117,456)
Distributions from unconsolidated entities	57,455	6,169	0
Investment in unconsolidated entities	(47,007)	(61,220)	(6,436)
Insurance proceeds for property damage claims	6,891	1,419	4,846
Net cash provided by (used in) investing activities	324,496	(937,107)	(1,214,280)
Cash flows from financing activities:
Net change in borrowings under revolving credit facilities	321,463	384,783	(35,637)
Proceeds from debt	2,549,473	1,111,649	893,218
Repayment of debt	(3,465,579)	(1,369,084)	(1,022,113)
Purchase of noncontrolling interests	(4,724)	(15,809)	(2,846)
Payment of deferred financing costs	(20,612)	(27,297)	(6,555)
Issuance of common stock, net	0	73,596	1,286,680
Cash distribution to common stockholders	(1,127,143)	(827,285)	(1,024,968)
Cash distribution to redeemable OP Unitholders	(7,459)	(5,677)	(8,640)
Cash issued for redemption of OP and Class C Units	(1,370)	0	0
Contributions from noncontrolling interests	1,883	4,402	7,326
Distributions to noncontrolling interests	(11,574)	(11,187)	(6,879)
Other	3,705	10,582	17,252
Net cash (used in) provided by financing activities	(1,761,937)	(671,327)	96,838
Net (decrease) increase in cash, cash equivalents and restricted cash	(55,974)	(179,682)	237,260
Effect of foreign currency translation	(815)	581	(825)
Cash, cash equivalents and restricted cash at beginning of period	188,253	367,354	130,919
Cash, cash equivalents and restricted cash, end of period	131,464	188,253	367,354
Supplemental disclosure of cash flow information:
Interest paid including swap payments and receipts	406,907	409,890	395,138
Assets acquired and liabilities assumed from acquisitions and other:
Real estate investments	94,280	425,906	69,092
Other assets	5,398	(3,716)	90,037
Debt	30,508	75,231	47,641
Other liabilities	18,086	70,878	72,636
Deferred income tax liability	922	(14,869)	9,381
Noncontrolling interests	2,591	4,202	22,517
Equity issued	30,487	0	0
Equity issued for redemption of OP and Class C Units	$ 907	$ 24,002	$ 24,318