CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 149,423	$ 282,540
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization of real estate, in-place lease, and other intangibles	157,538	189,276
Amortization of stock-based compensation	4,364	4,832
Amortization of deferred financing costs	2,213	2,582
Straight-line rents	(9,135)	(6,229)
Amortization of nonrefundable entrance fees and above/below market lease intangibles	(23,764)	(15,943)
Equity loss (income) from unconsolidated joint ventures	(1,008)	11,979
Distributions of earnings from unconsolidated joint ventures	237	9,513
Loss (gain) on sale of real estate under direct financing leases	0	(41,707)
Deferred income tax expense (benefit)	(1,148)	(24,911)
Impairments and loan loss reserves (recoveries), net	3,242	39,123
Loss (gain) on debt extinguishments	164,292	(833)
Loss (gain) on sales of real estate, net	(259,662)	(164,869)
Loss (gain) upon change of control, net	(1,042)	(167,434)
Casualty-related loss (recoveries), net	859	0
Other non-cash items	(726)	502
Decrease (increase) in accounts receivable and other assets, net	11,567	(5,036)
Increase (decrease) in accounts payable, accrued liabilities, and deferred revenue	(74,524)	(18,343)
Net cash provided by (used in) operating activities	122,726	95,042
Cash flows from investing activities:
Acquisitions of real estate	(14,914)	(20,018)
Development, redevelopment, and other major improvements of real estate	(135,339)	(209,418)
Leasing costs, tenant improvements, and recurring capital expenditures	(20,710)	(21,791)
Proceeds from sales of real estate, net	937,492	419,381
Acquisition of CCRC Portfolio	0	(396,352)
Contributions to unconsolidated joint ventures	(5,924)	(1,722)
Distributions in excess of earnings from unconsolidated joint ventures	10,825	2,639
Proceeds from sales/principal repayments on debt investments and direct financing leases	0	84,336
Investments in loans receivable and other	(3,704)	(8,066)
Net cash provided by (used in) investing activities	767,726	(151,011)
Cash flows from financing activities:
Borrowings under bank line of credit and commercial paper	3,437,200	2,025,600
Repayments under bank line of credit and commercial paper	(2,528,640)	(2,118,600)
Repayments and repurchase of debt, excluding bank line of credit and commercial paper	(1,491,754)	(5,338)
Payments for debt extinguishment and deferred financing costs	(158,011)	0
Issuance of common stock and exercise of options	1,087	1,066,428
Repurchase of common stock	(12,165)	(9,737)
Dividends paid on common stock	(164,118)	(188,500)
Distributions to and purchase of noncontrolling interests	(7,718)	(8,432)
Net cash provided by (used in) financing activities	(924,119)	761,421
Effect of foreign exchanges on cash, cash equivalents and restricted cash	0	(10)
Net increase (decrease) in cash, cash equivalents and restricted cash	(33,667)	705,442
Cash, cash equivalents and restricted cash, beginning of period	181,685	184,657
Cash, cash equivalents and restricted cash, end of period	$ 148,018	$ 890,099