CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 827,796	$ 97,771
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	496,383	501,695
Amortization of deferred financing costs	12,769	7,981
Amortization of discounts and premiums on debt	144	1,454
Amortization of deferred settlements on derivative instruments	2,441	1,978
Write-off of pursuit costs	4,052	3,512
Income from technology investments	(4,537)
Loss from investments in unconsolidated entities		735
Distributions from unconsolidated entities - return on capital	318	61
Net (gain) on sales of unconsolidated entities		(28,101)
Net (gain) loss on sales of land parcels	(4,217)	1,161
Net (gain) on sales of discontinued operations	(759,100)	(69,538)
Loss on debt extinguishments		158
Unrealized loss on derivative instruments	0	1
Compensation paid with Company Common Shares	16,722	14,716
Changes in assets and liabilities:
Decrease in deposits - restricted	5,101	75
Decrease (increase) in other assets	3,239	(6,385)
Increase in accounts payable and accrued expenses	60,608	66,070
(Decrease) in accrued interest payable	(28,736)	(31,257)
(Decrease) in other liabilities	(20,193)	(4,150)
Increase in security deposits	1,261	2,744
Net cash provided by operating activities	614,051	560,681
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate - acquisitions	(634,581)	(1,108,014)
Investment in real estate - development/other	(93,761)	(98,282)
Improvements to real estate	(106,070)	(98,959)
Additions to non-real estate property	(4,879)	(1,022)
Interest capitalized for real estate and unconsolidated entities under development	(5,931)	(10,196)
Proceeds from disposition of real estate, net	1,402,475	134,603
Investments in unconsolidated entities	(865)
Distributions from unconsolidated entities - return of capital		26,924
Proceeds from sale of investment securities		25,000
Proceeds from technology investments	4,537
(Increase) decrease in deposits on real estate acquisitions, net	(210,170)	248,547
Decrease (increase) in mortgage deposits	1,916	(2,340)
Consolidation of previously unconsolidated properties		(26,854)
Deconsolidation of previously consolidated properties	28,360
Acquisition of Noncontrolling Interests - Partially Owned Properties	(12,809)	(1,936)
Net cash provided by (used for) investing activities	368,222	(912,529)
CASH FLOWS FROM FINANCING ACTIVITIES:
Loan and bond acquisition costs	(8,070)	(7,897)
Mortgage notes payable:
Proceeds	152,930	124,020
Restricted cash	16,595	36,411
Lump sum payoffs	(859,066)	(491,100)
Scheduled principal repayments	(12,463)	(12,508)
(Loss) on debt extinguishments		(158)
Notes, net:
Proceeds		595,422
Lump sum payoffs	(575,641)
Lines of credit:
Proceeds	213,000	4,375,125
Repayments	(187,000)	(4,229,125)
(Payments on) settlement of derivative instruments		(10,040)
Proceeds from sale of Common Shares	154,508	73,356
Proceeds from Employee Share Purchase Plan (ESPP)	4,558	4,251
Proceeds from exercise of options	94,373	57,933
Common Shares repurchased and retired		(1,887)
Payment of offering costs	(2,770)	(730)
Other financing activities, net	(33)	(33)
Contributions - Noncontrolling Interests - Partially Owned Properties	64	222
Distributions:
Common Shares	(331,928)	(284,185)
Preferred Shares	(10,399)	(10,858)
Noncontrolling Interests - Operating Partnership	(15,464)	(14,187)
Noncontrolling Interests - Partially Owned Properties	(889)	(1,812)
Net cash (used for) provided by financing activities	(1,367,695)	202,220
Net (decrease) in cash and cash equivalents	(385,422)	(149,628)
Cash and cash equivalents, beginning of period	431,408	193,288
Cash and cash equivalents, end of period	45,986	43,660
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	381,194	377,467
Net cash paid (received) for income and other taxes	607	(2,892)
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	99,131	338,196
Valuation of OP Units issued		7,433
Mortgage loans (assumed) by purchaser		(39,999)
Amortization of deferred financing costs:
Investment in real estate, net		(1,824)
Deferred financing costs, net	12,769	9,805
Amortization of discounts and premiums on debt:
Mortgage notes payable	(6,116)	(5,048)
Notes, net	6,260	6,502
Amortization of deferred settlements on derivative instruments:
Other liabilities	(401)	(401)
Accumulated other comprehensive income	2,842	2,379
Unrealized loss on derivative instruments:
Other assets	5,217	13,788
Mortgage notes payable	(464)	6
Notes, net	(1,476)	9,835
Other liabilities	127,090	99,844
Accumulated other comprehensive (loss)	(130,367)	(123,472)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(5,760)	(10,196)
Investments in unconsolidated entities	(171)
Consolidation of previously unconsolidated properties:
Investment in real estate, net		(105,065)
Investments in unconsolidated entities		7,376
Deposits - restricted		(42,633)
Mortgage notes payable		112,631
Net other assets recorded		837
Deconsolidation of previously consolidated properties:
Investment in real estate, net	35,495
Investments in unconsolidated entities	(7,135)
(Payments on) settlement of derivative instruments:
Other liabilities		(10,040)
Other:
Receivable on sale of Common Shares		37,550
Transfer from notes, net to mortgage notes payable		$ 35,600