CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 430,556	$ 338,958
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	404,723	389,251
Amortization of deferred financing costs	5,783	5,778
Amortization of above/below market lease intangibles	(35)	2,196
Amortization of discounts and premiums on debt	17,795	3,263
Amortization of deferred settlements on derivative instruments	8,896	9,302
Amortization of right-of-use assets	6,952
Write-off of pursuit costs	2,987	2,066
(Income) loss from investments in unconsolidated entities	(68,058)	2,008
Distributions from unconsolidated entities – return on capital	2,387	1,188
Net (gain) loss on sales of real estate properties	(138,835)	(142,162)
Net (gain) loss on sales of land parcels	(178)	(995)
Net (gain) loss on debt extinguishment		22,110
Compensation paid with Company Common Shares	16,782	17,032
Changes in assets and liabilities:
(Increase) decrease in other assets	1,610	417
Increase (decrease) in accounts payable and accrued expenses	22,435	25,396
Increase (decrease) in accrued interest payable	1,536	5,306
Increase (decrease) in other liabilities	(25,161)	2,549
Increase (decrease) in security deposits	1,769	1,791
Increase (decrease) in lease liabilities	(1,171)
Net cash provided by operating activities	690,773	685,454
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(653,132)	(200,546)
Investment in real estate – development/other	(93,210)	(76,635)
Capital expenditures to real estate	(81,528)	(85,987)
Non-real estate capital additions	(1,466)	(2,145)
Interest capitalized for real estate under development	(2,679)	(2,937)
Proceeds from disposition of real estate, net	393,439	287,173
Investments in unconsolidated entities	(8,572)	(3,099)
Distributions from unconsolidated entities – return of capital	78,262
Purchase of investment securities and other investments	(269)
Net cash provided by (used for) investing activities	(369,155)	(84,176)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,069)	(4,354)
Mortgage notes payable, net:
Proceeds	295,620
Lump sum payoffs	(95,500)	(725,639)
Scheduled principal repayments	(3,110)	(3,273)
Notes, net:
Proceeds	597,480	497,010
Line of credit and commercial paper:
Line of credit proceeds	1,995,000	415,000
Line of credit repayments	(1,995,000)	(415,000)
Commercial paper proceeds	7,775,817	4,766,050
Commercial paper repayments	(8,275,000)	(4,720,000)
Proceeds from (payments on) settlement of derivative instruments	(41,616)	1,638
Proceeds from Employee Share Purchase Plan (ESPP)	1,652	2,181
Proceeds from exercise of options	48,487	2,617
Payment of offering costs	(155)	(27)
Other financing activities, net	(49)	(48)
Contributions – Noncontrolling Interests – Partially Owned Properties	4,594	125
Contributions – Noncontrolling Interests – Operating Partnership		1
Distributions:
Common Shares	(409,943)	(384,315)
Preferred Shares	(773)	(1,545)
Noncontrolling Interests – Operating Partnership	(14,728)	(13,854)
Noncontrolling Interests – Partially Owned Properties	(5,170)	(7,620)
Net cash provided by (used for) financing activities	(128,463)	(613,163)
Net increase (decrease) in cash and cash equivalents and restricted deposits	193,155	(11,885)
Cash and cash equivalents and restricted deposits, beginning of period	116,313	100,762
Cash and cash equivalents and restricted deposits, end of period	309,468	88,877
Cash and cash equivalents	251,273	34,507
Restricted deposits	58,195	54,370
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	171,116	188,913
Net cash paid for income and other taxes	754	644
Amortization of deferred financing costs:
Other assets	1,206	1,206
Mortgage notes payable, net	2,344	2,552
Notes, net	2,233	2,020
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	16,426	1,963
Notes, net	1,369	1,300
Amortization of deferred settlements on derivative instruments:
Other liabilities	(6)	(5)
Accumulated other comprehensive income	8,902	9,307
Write-off of pursuit costs:
Investment in real estate, net	2,947	2,042
Other assets	37	10
Accounts payable and accrued expenses	3	14
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	(68,735)	1,321
Other liabilities	677	687
Realized/unrealized (gain) loss on derivative instruments:
Other assets	2,002	(13,226)
Notes, net	2,253	(2,151)
Other liabilities	29,510	3,382
Accumulated other comprehensive income	(33,765)	11,995
Investments in unconsolidated entities:
Investments in unconsolidated entities	(6,472)	(2,379)
Other liabilities	(2,100)	(720)
Debt financing costs:
Other assets	145
Mortgage notes payable, net	(2,237)
Notes, net	(5,213)	(4,354)
Other liabilities	1,236
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	(438,705)
Other assets	184,116
Lease liabilities	282,791
Other liabilities	$ (28,202)
Mortgage Notes Payable, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		$ (22,110)