CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 480,558	$ 578,626
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization of real estate, in-place lease and other intangibles: Continuing operations	397,893	421,181
Depreciation and amortization of real estate, in-place lease and other intangibles: Discontinued operations	0	4,401
Amortization of deferred compensation	10,865	19,307
Amortization of deferred financing costs	11,141	15,598
Straight-line rents	(12,236)	(14,412)
Equity loss (income) from unconsolidated joint ventures	(4,571)	4,028
Distributions of earnings from unconsolidated joint ventures	27,692	5,919
Loss (gain) on sales of real estate, net	(322,852)	(119,605)
Allowance for loan losses	59,420	0
Deferred income tax expense (benefit)	(17,786)	47,195
Impairments (recoveries), net	22,590	0
Loss on extinguishment of debt	54,227	0
Casualty-related loss (recoveries), net	9,912	0
Foreign exchange and other losses (gains), net	(986)	(127)
Gain (loss) on sale of marketable securities	(50,895)	0
Other non-cash items	(543)	(2,035)
Changes in:
Accounts receivable, net	396	7,558
Other assets, net	(2,617)	(9,674)
Accounts payable and accrued liabilities	(24,312)	40,672
Net cash provided by (used in) operating activities	637,896	998,632
Cash flows from investing activities:
Acquisitions of real estate	(135,816)	(257,242)
Development and redevelopment of real estate	(261,510)	(304,818)
Leasing costs, tenant improvements, and recurring capital expenditures	(75,211)	(64,501)
Proceeds from sales of real estate, net	1,249,993	211,810
Contributions to unconsolidated joint ventures	(25,776)	(10,169)
Distributions in excess of earnings from unconsolidated joint ventures	4,845	14,458
Net proceeds from the RIDEA II transaction	480,614	0
Proceeds from the sales of Four Seasons investments	135,538	0
Principal repayments on direct financing leases, loans receivable and other	414,732	221,179
Investments in loans receivable, direct financing leases and other	(28,339)	(129,335)
Decrease (increase) in restricted cash	(3,247)	4,459
Net cash provided by (used in) investing activities	1,755,823	(314,159)
Cash flows from financing activities:
Net borrowings (repayments) under bank line of credit	23,419	1,157,897
Repayments under bank line of credit	(339,826)	(135,000)
Repayment of term loans	(234,459)	0
Repayments of senior unsecured notes	(750,000)	(900,000)
Issuance of mortgage and other debt	5,395	0
Repayments of mortgage and other debt	(482,487)	(249,540)
Debt extinguishment costs	(51,415)	0
Deferred financing costs	0	(1,057)
Issuance of common stock and exercise of options	18,118	59,184
Repurchase of common stock	(4,459)	(8,667)
Dividends paid on common stock	(520,779)	(806,243)
Issuance of noncontrolling interests	1,050	4,785
Distributions to noncontrolling interests	(19,520)	(18,687)
Net cash provided by (used in) financing activities	(2,354,963)	(897,328)
Effect of foreign exchange on cash and cash equivalents	401	(754)
Net increase (decrease) in cash and cash equivalents	39,157	(213,609)
Cash and cash equivalents, beginning of period	94,730	346,500
Cash and cash equivalents, end of period	$ 133,887	$ 132,891