CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss)	$ 10,265	$ (9,240)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:
Depreciation	41,334	45,445
Amortization of Deferred Financing Costs	1,590	1,622
Other Amortization	14,155	14,704
Impairment of Real Estate	1,605	1,101
Provision for Bad Debt	484	550
Equity in Income of Joint Ventures	(47)	(128)
Distributions from Joint Ventures	0	27
Gain on Sale of Real Estate	(10,669)	(7,614)
Gain on Change in Control of Interests	0	(776)
Loss from Retirement of Debt	5,372	6,222
Mark-to-Market (Gain) Loss on Interest Rate Protection Agreements	(52)	305
Equity in Income of Other Real Estate Partnerships	(4,571)	(3,566)
Distributions from Investment in Other Real Estate Partnerships	4,571	3,566
(Increase) Decrease in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(249)	3,223
Increase in Deferred Rent Receivable	(2,283)	(1,704)
(Decrease) Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(16,545)	1,571
Payments of Premiums, Discounts and Prepayment Penalties Associated with Retirement of Debt	(3,990)	(3,287)
Net Cash Provided by Operating Activities	40,970	52,021
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(47,293)	(48,519)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(43,767)	(35,107)
Net Proceeds from Sales of Investments in Real Estate	50,375	22,002
Investments in and Advances to Other Real Estate Partnerships	(24,646)	(7,970)
Distributions from Other Real Estate Partnerships in Excess of Equity in Income	12,864	8,047
Contributions to and Investments in Joint Ventures	(18)	(184)
Repayments of Notes Receivable	295	8,306
Increase in Escrows	(409)	0
Net Cash Used in Investing Activities	(52,599)	(53,425)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt and Equity Issuance Costs	(311)	(287)
Unit Contributions	174,081	18,063
Repurchase and Retirement of Restricted Units	(2,732)	(855)
Common Unit Distributions	(9,540)	0
Preferred Unit Distributions Paid / Advanced	(6,114)	(9,525)
Redemption of Preferred Units	(100,000)	0
Payments on Interest Rate Swap Agreement	(598)	(572)
Repayments on Mortgage and Other Loans Payable	(24,429)	(17,432)
Repayments of Senior Unsecured Notes	(28,965)	(148,310)
Proceeds from Unsecured Credit Facility	194,000	241,000
Repayments on Unsecured Credit Facility	(184,000)	(84,000)
Net Cash Provided by (Used in) Financing Activities	11,392	(1,918)
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	(43)	(1)
Net Decrease in Cash and Cash Equivalents	(237)	(3,322)
Cash and Cash Equivalents, Beginning of Year	4,357	7,624
Cash and Cash Equivalents, End of Year	$ 4,077	$ 4,301