Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 61,585	$ 153,614
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	173,028	162,028
Depreciable real estate reserves, net of recoveries	2,150	(5,789)
Equity in net income from unconsolidated joint ventures	(1,313)	(69,330)
Distributions of cumulative earnings from unconsolidated joint ventures	13,467	77,981
Purchase price fair value adjustment	2,305
Equity in net loss (gain) on sale of interest in unconsolidated joint venture/real estate	3,583	(16,794)
Gain on sale of discontinued operations	(1,113)	(6,627)
Loan loss and other investment reserves, net of recoveries		564
Loss on early extinguishment of deb	10,968
Deferred rents receivable	(29,452)	(37,318)
Other non-cash adjustments	(28,375)	3,759
Changes in operating assets and liabilities:
Restricted cash - operations	6,127	(7,104)
Tenant and other receivables	4,896	(5,006)
Related party receivables	768	(3,792)
Deferred lease costs	(19,106)	(28,549)
Other assets	4,075	(27,176)
Accounts payable, accrued expenses and other liabilities	1,793	9,609
Deferred revenue and land leases payable	8,102	(2,135)
Net cash provided by operating activities	213,488	197,935
Investing Activities
Acquisitions of real estate property	(52,534)	(248,468)
Additions to land, buildings and improvements	(61,531)	(76,585)
Escrowed cash - capital improvements/acquisition deposits	(394)	(65,030)
Investments in unconsolidated joint ventures	(81,913)	(131,820)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	11,117	44,172
Net proceeds from disposition of real estate/joint venture interest	5,852	26,099
Other investments	(18,038)	(31,206)
Debt and preferred equity and other investments, net of repayments/participations	150,919	(75,209)
Net cash used in investing activities	(46,522)	(558,047)
Financing Activities
Proceeds from mortgages and other loans payable	980,333	1,113,500
Repayments of mortgages and other loans payable	(833,728)	(472,288)
Proceeds from credit facility and senior unsecured notes	370,000	468,339
Repayments of credit facility and senior unsecured notes	(404,970)	(840,793)
Contributions of proceeds from stock options exercised and DRIP issuance	8,995	105,195
Contributions of net proceeds from sale of common stock/preferred stock	8,478	201,307
Redemption of preferred units	(192,500)
Purchases of treasury stock		(11,158)
Distributions to noncontrolling interests in other partnerships	(8,152)	(11,999)
Contributions from noncontrolling interests in other partnerships	3,364	18,799
Distributions paid on common and preferred units	(81,309)	(60,716)
Deferred loan costs and capitalized lease obligations	(8,492)	(31,467)
Net cash (used in) provided by financing activities	(157,981)	478,719
Net increase in cash and cash equivalents	8,985	118,607
Cash and cash equivalents at beginning of period	189,984	138,192
Cash and cash equivalents at end of period	$ 198,969	$ 256,799