Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Loss	$ (4,477)	$ (33,919)
Adjustments to Reconcile Net Loss to Net Cash Provided by Operating Activities:
Depreciation	43,953	53,724
Amortization of Deferred Financing Costs	2,162	1,614
Other Amortization	17,363	20,991
Impairment of Real Estate, Net	(4,823)	9,155
Provision for Bad Debt	563	774
Mark-to-Market Loss on Interest Rate Protection Agreements	188	1,458
Loss on Early Retirement of Debt	4,259	3,965
Equity in Income of Joint Ventures	(135)	(123)
Distributions from Joint Venture	161	1,783
Prepayment Premiums Associated with Early Retirement of Debt	(1,268)
Gain on Sale of Real Estate	(7,341)	(8,691)
Gain on Change in Control of Interests	(689)
Decrease (Increase) in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	866	(1,175)
Increase in Deferred Rent Receivable	(4,341)	(4,476)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(8,765)	(7,367)
Decrease (Increase) in Restricted Cash	101	(79)
Repayments of Discount on Senior Unsecured Notes	(27)	(6,192)
Net Cash Provided by Operating Activities	37,750	31,442
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of and Additions to Investment in Real Estate and Lease Costs	(37,952)	(47,962)
Net Proceeds from Sales of Investments in Real Estate	28,472	52,270
Contributions to and Investments in Joint Ventures	(16)	(414)
Distributions from Joint Ventures	108	4,484
Repayments of Notes Receivable	10,049	976
Decrease (Increase) in Lender Escrows	88	(1,077)
Net Cash Provided by Investing Activities	749	8,277
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt and Equity Issuance Costs	(2,258)	(954)
Proceeds from the Issuance of Common Stock	202,845	10,341
Repurchase and Retirement of Restricted Stock	(1,001)	(268)
Preferred Stock Dividends	(9,874)	(9,939)
Payments on Interest Rate Swap Agreement	(292)	(228)
Costs Associated with Early Retirement of Debt		(1,008)
Proceeds from Origination of Mortgage Loans Payable	178,300	54,580
Repayments on Mortgage Loans Payable	(64,198)	(4,454)
Repayments on Senior Unsecured Notes	(56,419)	(225,729)
Proceeds from Unsecured Credit Facility	101,500	51,500
Repayments on Unsecured Credit Facility	(378,553)	(10,341)
Net Cash Used in Financing Activities	(29,950)	(136,500)
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	36	37
Net Increase (Decrease) in Cash and Cash Equivalents	8,549	(96,781)
Cash and Cash Equivalents, Beginning of Period	25,963	182,943
Cash and Cash Equivalents, End of Period	$ 34,548	$ 86,199