CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 113,098	$ 90,092
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amounts in discontinued operations)	186,943	164,636
Amortization of deferred revenue and lease intangibles, net	(3,310)	(5,160)
Other non-cash amortization	(5,329)	(10,108)
Change in fair value of financial instruments	25	33
Stock-based compensation	5,662	4,834
Straight-lining of rental income, net	(7,865)	(4,890)
Loss on extinguishment of debt, net	0	29,544
Gain on real estate dispositions, net (including amounts in discontinued operations)	(477)	(40,233)
(Gain) loss on real estate loan investments	(340)	559
Income tax expense (including amounts in discontinued operations)	1,744	11,305
Loss (income) from unconsolidated entities	312	(317)
Gain on re-measurement of equity interest upon acquisition, net	(1,241)	0
Other	2,880	3,049
Changes in operating assets and liabilities:
(Increase) decrease in other assets	(10,459)	1,275
Increase in accrued interest	10,530	20,452
Decrease in accounts payable and other liabilities	(61,868)	(20,110)
Net cash provided by operating activities	230,305	244,961
Cash flows from investing activities:
Net investment in real estate property	(56,175)	(500)
Purchase of noncontrolling interest	(3,186)	0
Investment in loans receivable	(2,789)	(22,473)
Proceeds from real estate disposals	11,250	8,847
Proceeds from loans receivable	146,394	17,244
Funds held in escrow for future development expenditures	5,440	0
Development project expenditures	(21,588)	(31,274)
Capital expenditures	(19,795)	(10,019)
Other	(78)	(2,137)
Net cash provided by (used in) investing activities	59,473	(40,312)
Cash flows from financing activities:
Net change in borrowings under revolving credit facility	(375,916)	(382,398)
Proceeds from debt	916,871	667,330
Repayment of debt	(635,793)	(298,801)
Payment of deferred financing costs	(13,808)	(1,793)
Issuance of common stock, net	5,050	0
Cash distribution to common stockholders	(195,700)	(179,253)
Cash distribution to redeemable OP unitholders	(1,151)	(1,112)
Purchases of redeemable OP units	(108)	(233)
Distributions to noncontrolling interest	(1,450)	(1,592)
Other	2,058	565
Net cash used in financing activities	(299,947)	(197,287)
Net (decrease) increase in cash and cash equivalents	(10,169)	7,362
Effect of foreign currency translation on cash and cash equivalents	(49)	55
Cash and cash equivalents at beginning of period	67,908	45,807
Cash and cash equivalents at end of period	57,690	53,224
Assets and liabilities assumed from acquisitions:
Real estate investments	8,839	54,881
Utilization of funds held for an Internal Revenue Code Section 1031 exchange	0	(37,799)
Other assets acquired	668	(5,126)
Debt assumed	0	17,734
Other liabilities	6,422	(6,989)
Deferred income tax liability	1,532	0
Noncontrolling interests	1,553	(3,115)
Equity issued	0	4,326
Debt transferred on the sale of assets	$ 0	$ 14,535