CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 163,828	$ 68,780
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amounts in discontinued operations)	366,405	132,514
Amortization of deferred revenue and lease intangibles, net	(8,829)	(1,550)
Other non-cash amortization	(21,185)	3,139
Change in fair value of financial instruments	93	(8,887)
Stock-based compensation	11,086	8,368
Straight-lining of rental income, net	(10,470)	(3,749)
Loss on extinguishment of debt	39,533	16,526
Gain on real estate dispositions, net (including amounts in discontinued operations)	(78,791)	0
Loss (gain) on real estate loan investments	559	(3,255)
Gain on sale of marketable securities	0	(733)
Income tax expense (benefit) (including amounts in discontinued operations)	6,138	(9,404)
(Income) loss from unconsolidated entities	(831)	253
Other	5,897	689
Changes in operating assets and liabilities:
Decrease (increase) in other assets	861	(9,940)
Increase in accrued interest	10,259	4,008
Decrease in accounts payable and other liabilities	(23,745)	(10,459)
Net cash provided by operating activities	460,808	186,300
Cash flows from investing activities:
Net investment in real estate property	(899,404)	(264,464)
Purchase of noncontrolling interest	(3,934)	(3,319)
Investment in loans receivable	(27,260)	(612,925)
Proceeds from real estate disposals	8,847	0
Proceeds from loans receivable	33,223	132,363
Proceeds from sale of marketable securities	0	23,050
Development project expenditures	(60,561)	(5,687)
Capital expenditures	(23,812)	(13,549)
Other	(2,150)	(75)
Net cash used in investing activities	(975,051)	(744,606)
Cash flows from financing activities:
Net change in borrowings under revolving credit facilities	(88,654)	99,500
Proceeds from debt	1,269,315	704,111
Repayment of debt	(645,722)	(337,427)
Payment of deferred financing costs	(2,980)	(1,363)
Issuance of common stock, net	342,469	299,926
Cash distribution to common stockholders	(361,957)	(201,949)
Cash distribution to redeemable OP unitholders	(2,241)	0
Purchases of redeemable OP units	(611)	0
Distributions to noncontrolling interest	(2,907)	(616)
Other	14,509	913
Net cash provided by financing activities	521,221	563,095
Net increase in cash and cash equivalents	6,978	4,789
Effect of foreign currency translation on cash and cash equivalents	18	101
Cash and cash equivalents at beginning of period	45,807	21,812
Cash and cash equivalents at end of period	52,803	26,702
Assets and liabilities assumed from acquisitions:
Real estate investments	364,883	3,140,924
Utilization of escrow funds held for an Internal Revenue Code Section 1031 exchange	(134,003)	0
Other assets acquired	81,509	110,722
Debt assumed	250,363	1,621,641
Other liabilities	26,639	200,962
Deferred income tax liability	5,895	48,087
Noncontrolling interests	25,166	0
Equity issued	$ 4,326	$ 1,380,956