CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (Loss)	$ 5,078	$ (1,128)
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:
Depreciation	20,704	19,987
Amortization of Deferred Financing Costs	759	802
Other Amortization	7,557	7,524
Provision for Bad Debt	650	164
Equity in Income of Joint Ventures	(2,966)	(20)
Distributions from Joint Ventures	962	0
(Gain) Loss on Sale of Real Estate	(432)	2,812
Loss from Retirement of Debt	0	1,150
Mark-to-Market Loss on Interest Rate Protection Agreements	0	4
Equity in Income of Other Real Estate Partnerships	(3,094)	(2,172)
Distributions from Investment in Other Real Estate Partnerships	3,094	2,172
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(3,702)	(1,557)
Decrease (Increase) in Deferred Rent Receivable	628	(1,300)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(8,296)	(9,246)
Payments of Premiums, Discounts and Prepayment Penalties Associated with Retirement of Debt	0	(856)
Cash Book Overdraft	1,237	0
Net Cash Provided by Operating Activities	22,179	18,336
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(13,262)	(9,745)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(17,646)	(22,649)
Net Proceeds from Sales of Investments in Real Estate	1,191	10,670
Investments in and Advances to Other Real Estate Partnerships	(9,092)	(10,396)
Distributions from Other Real Estate Partnerships in Excess of Equity in Income	7,771	6,821
Contributions to and Investments in Joint Ventures	0	(18)
Distributions from Joint Ventures	2,074	0
Repayments of Notes Receivable	17,080	152
Increase in Escrows	(258)	(256)
Net Cash Used in Investing Activities	(12,142)	(25,421)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt and Equity Issuance and Redemption Costs	(2,034)	(98)
Unit Contributions	0	132,258
Repurchase and Retirement of Restricted Units	(1,475)	(2,401)
Common Unit Distributions Paid	(9,740)	0
Preferred Unit Distributions Paid	(1,471)	(4,289)
Redemption of Preferred Units	(75,000)	0
Payments on Interest Rate Swap Agreement	0	(305)
Repayments on Mortgage Loans Payable	(2,756)	(17,319)
Repayments of Senior Unsecured Notes	0	(3,995)
Proceeds from Unsecured Term Loan	200,000	0
Proceeds from Unsecured Credit Facility	105,000	52,000
Repayments on Unsecured Credit Facility	(226,000)	(132,000)
Net Cash (Used in) Provided by Financing Activities	(13,476)	23,851
Net Effect of Exchange Rate Changes on Cash and Cash Equivalents	(30)	(14)
Net (Decrease) Increase in Cash and Cash Equivalents	(3,439)	16,766
Cash and Cash Equivalents, Beginning of Year	6,518	4,357
Cash and Cash Equivalents, End of Year	$ 3,049	$ 21,109