Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss)	$ 1,055	$ (4,383)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:
Depreciation	27,318	21,537
Amortization of Deferred Financing Costs	875	1,085
Other Amortization	7,787	8,558
Impairment of Real Estate, Net	1,246	(52)
Provision for Bad Debt	227	196
Mark-to-Market Gain on Interest Rate Protection Agreements	(124)	(44)
(Gain) Loss from Retirement of Debt	(1)	1,026
Prepayment Premiums Associated with Retirement of Debt		(446)
Equity in Income of Joint Ventures	(91)	(36)
Distributions from Joint Venture	27
Gain on Sale of Real Estate	(6,199)	(3,804)
Gain on Change in Control of Interests	(776)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(527)	(4,978)
Increase in Deferred Rent Receivable	(1,078)	(2,547)
Increase (Decrease) in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	498	(9,730)
Decrease in Restricted Cash		105
Net Cash Provided by Operating Activities	30,237	6,487
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of and Additions to Investment in Real Estate and Lease Costs	(28,828)	(13,383)
Net Proceeds from Sales of Investments in Real Estate	19,467	17,153
Contributions to and Investments in Joint Ventures	(5)	(4)
Repayments of Notes Receivable	8,007	8,739
Increase in Lender Escrows		(13)
Net Cash (Used In) Provided by Investing Activities	(1,359)	12,492
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt and Equity Issuance Costs	(88)	(108)
Proceeds from the Issuance of Common Stock, Net of Underwriter's Discount	18,063	100,570
Repurchase and Retirement of Restricted Stock	(785)	(673)
Preferred Dividends	(4,311)	(5,379)
Payments on Interest Rate Swap Agreement	(280)	(194)
Repayments on Mortgage and Other Loans Payable	(15,127)	(35,084)
Repayments on Senior Unsecured Notes	(406)
Proceeds from Unsecured Credit Facility	38,000	10,000
Repayments on Unsecured Credit Facility	(72,000)	(100,590)
Net Cash Used in Financing Activities	(36,934)	(31,458)
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	7	29
Net Decrease in Cash and Cash Equivalents	(8,056)	(12,479)
Cash and Cash Equivalents, Beginning of Period	10,153	25,963
Cash and Cash Equivalents, End of Period	$ 2,104	$ 13,513