Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash Flows from Operating Activities:
Net income	$ 55,237	$ 51,347
Operating distributions received from unconsolidated joint ventures	1,753	2,284
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	54,769	51,794
Amortization of deferred financing costs and fair market value adjustments on notes payable	2,687	1,393
Other amortization	27,349	21,849
Impairment loss		9,587
Accretion of notes receivable discount	(482)	(1,360)
Stock compensation expense	1,864	1,364
Equity in income of unconsolidated joint ventures	(547)	(1,384)
Gain on consolidation of variable interest entity	(1,532)
Changes in assets and liabilities:
(Increase)/decrease in tenant receivables, net	(3,667)	545
Increase in restricted cash and escrows	(3,354)	(4,820)
Increase in prepaid expenses and other assets	(5,381)	(5,879)
(Decrease)/increase in accounts payable and accrued expenses	(5,866)	9,570
Decrease in deferred income	(7,603)	(590)
Net cash provided by operating activities	115,227	135,700
Cash Flows from Investing Activities:
Investments in real estate assets	(76,121)	(18,708)
Cash assumed upon consolidation of variable interest entity	5,063
Net sales proceeds received from unconsolidated joint ventures	321
Investments in unconsolidated joint ventures	(158)	(8)
Deferred lease costs paid	(20,149)	(6,202)
Net cash used in investing activities	(91,044)	(24,918)
Cash Flows from Financing Activities:
Deferred financing costs paid	(83)	(654)
Proceeds from line of credit and notes payable	349,000
Repayments of line of credit and notes payable	(299,000)	(114,000)
Net proceeds from issuance of common stock		186,026
Redemption of fractional shares of common stock		(2,918)
Dividends paid and discount on dividend reinvestments	(109,414)	(108,174)
Net cash used in financing activities	(59,497)	(39,720)
Net (decrease)/increase in cash and cash equivalents	(35,314)	71,062
Cash and cash equivalents, beginning of period	56,718	10,004
Cash and cash equivalents, end of period	21,404	81,066
Supplemental Disclosures of Significant Noncash Investing and Financing Activities:
Chage in accrued offering costs	479	1,608
Accrued capital expenditures and deferred lease costs	2,111	720
Net assets assumed upon consolidation of variable interest entity, net of notes receivable previously recorded	188,283
Liabilities assumed upon consolidation of variable interest entity	191,814
Redeemable common stock		$ 75,164