CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 546,219	$ 641,641
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	661,921	667,896
Amortization of deferred financing costs	7,023	6,421
Amortization of discounts and premiums on debt	2,815	4,123
Amortization of deferred settlements on derivative instruments	3,123	9,978
Amortization of right-of-use assets	9,572	9,123
Write-off of pursuit costs	2,739	3,296
(Income) loss from investments in unconsolidated entities	3,847	3,456
Distributions from unconsolidated entities – return on capital	436	251
Net (gain) loss on sales of real estate properties	(127,034)	(304,346)
Realized (gain) loss on investment securities	(1,511)	(2,061)
Unrealized (gain) loss on investment securities	(4,461)
Compensation paid with Company Common Shares	26,948	24,559
Changes in assets and liabilities:
(Increase) decrease in other assets	11,887	20,734
Increase (decrease) in accounts payable and accrued expenses	71,334	76,274
Increase (decrease) in accrued interest payable	(18,791)	(19,858)
Increase (decrease) in lease liabilities	(1,077)	(1,166)
Increase (decrease) in other liabilities	(7,024)	(23,199)
Increase (decrease) in security deposits	558	3,106
Net cash provided by operating activities	1,188,524	1,120,228
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(324,497)	(113,046)
Investment in real estate – development/other	(60,179)	(81,889)
Capital expenditures to real estate	(229,763)	(141,707)
Non-real estate capital additions	(1,457)	(2,232)
Interest capitalized for real estate and unconsolidated entities under development	(9,579)	(4,181)
Proceeds from disposition of real estate, net	191,718	720,302
Investments in unconsolidated entities - acquisitions	(989)	(49,330)
Investments in unconsolidated entities - development/other	(34,076)	(87,129)
Distributions from unconsolidated entities – return of capital	15	9
Purchase of investment securities and other investments	(2,500)	(1,045)
Proceeds from sale of investment securities	2,952	3,584
Net cash provided by (used for) investing activities	(468,355)	243,336
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(4,106)	(373)
Mortgage notes payable, net:
Proceeds	572,896	37,429
Lump sum payoffs	(932,598)	(260,874)
Scheduled principal repayments	(554)	(3,186)
Notes, net:
Lump sum payoffs		(500,000)
Line of credit and commercial paper:
Commercial paper proceeds	4,393,568	5,140,685
Commercial paper repayments	(4,025,887)	(5,266,158)
Proceeds from (payments on) settlement of derivative instruments	25,169
Finance ground lease principal payments	(1,995)	(1,845)
Proceeds from Employee Share Purchase Plan (ESPP)	2,591	3,280
Proceeds from exercise of options	11,474	21,021
Payment of offering costs		(739)
Other financing activities, net	(37)	(31)
Acquisition of Noncontrolling Interests – Partially Owned Properties	(3,737)	(32,178)
Contributions – Noncontrolling Interests – Partially Owned Properties	9	603
Contributions – Noncontrolling Interests – Operating Partnership	1	1
Distributions:
Common Shares	(738,584)	(696,679)
Preferred Shares	(2,319)	(2,318)
Noncontrolling Interests – Operating Partnership	(22,969)	(22,735)
Noncontrolling Interests – Partially Owned Properties	(3,536)	(18,236)
Net cash provided by (used for) financing activities	(730,614)	(1,602,333)
Net increase (decrease) in cash and cash equivalents and restricted deposits	(10,445)	(238,769)
Cash and cash equivalents and restricted deposits, beginning of period	137,172	360,236
Cash and cash equivalents and restricted deposits, end of period	126,727	121,467
Cash and cash equivalents	39,250	44,788
Restricted deposits	87,477	76,679
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	206,080	221,218
Net cash paid (received) for income and other taxes	1,035	728
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	42,256
Amortization of deferred financing costs:
Investment in real estate, net	(211)	(380)
Other assets	2,089	1,754
Mortgage notes payable, net	2,265	1,620
Notes, net	2,880	3,427
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	1,129	1,865
Notes, net	1,686	2,258
Amortization of deferred settlements on derivative instruments:
Other liabilities	(9)	(9)
Accumulated other comprehensive income	3,132	9,987
Write-off of pursuit costs:
Investment in real estate, net	421	948
Investments in unconsolidated entities	1,667	2,197
Other assets	651	151
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	2,909	2,517
Other liabilities	938	939
Realized/unrealized (gain) loss on derivative instruments:
Other assets	(3,749)	(23,413)
Other liabilities	(765)
Accumulated other comprehensive income	4,514	23,413
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(3,468)	(1,312)
Investments in unconsolidated entities	(6,111)	(2,869)
Investments in unconsolidated entities - development/other:
Investments in unconsolidated entities	(32,667)	(85,839)
Other liabilities	(1,409)	(1,290)
Debt financing costs:
Other assets		(45)
Mortgage notes payable, net	(4,106)	(228)
Notes, net		(100)
Proceeds from (payments on) settlement of derivative instruments:
Other assets	25,613
Other liabilities	(444)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	(7,105)	(224)
Lease liabilities	7,105	224
Non Cash Share Distribution From Unconsolidated Entities [Abstract]
Non Cash Share Distribution From Unconsolidated Entities Investments In Unconsolidated Entities	539	4,201
Non Cash Share Distribution From Unconsolidated Entities Changes In Other Assets	$ (539)	$ (4,201)