Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Investment in Real Estate:
Land	$ 504,723	$ 485,790
Buildings and Improvements	1,922,802	1,843,134
Construction in Progress	4,137	2,672
Less: Accumulated Depreciation	(495,048)	(443,912)
Net Investment in Real Estate	1,936,614	1,887,684
Real Estate Held for Sale, Net of Accumulated Depreciation and Amortization of $109,183 and $148,407 at June 30, 2011 and December 31, 2010, respectively	280,685	344,353
Investments in and Advances to Other Real Estate Partnerships	203,227	252,541
Cash and Cash Equivalents	31,984	22,484
Restricted Cash	4	105
Tenant Accounts Receivable, Net	3,647	2,602
Investments in Joint Ventures	2,101	2,451
Deferred Rent Receivable, Net	37,470	32,383
Deferred Financing Costs, Net	12,572	14,492
Deferred Leasing Intangibles, Net	36,337	33,639
Prepaid Expenses and Other Assets, Net	110,304	119,052
Total Assets	2,654,945	2,711,786
Indebtedness:
Mortgage and Other Loans Payable, Net	528,974	431,284
Senior Unsecured Notes, Net	823,659	879,529
Unsecured Credit Facility	100,000	376,184
Mortgage Loan Payable on Real Estate Held for Sale, Net, Inclusive of $6 of Accrued Interest at December31, 2010		1,014
Accounts Payable, Accrued Expenses and Other Liabilities, Net	70,240	79,949
Deferred Leasing Intangibles, Net	15,052	16,145
Rents Received in Advance and Security Deposits	22,821	24,469
Leasing Intangibles Held for Sale, Net of Accumulated Amortization of $932 and $2,642 at June 30, 2011 and December 31, 2010, respectively	1,126	1,909
Total Liabilities	1,561,872	1,810,483
Commitments and Contingencies
Partners' Capital:
General Partner Preferred Units ( 1,550 units issued and outstanding at June 30, 2011 and December 31, 2010, respectively) with a liquidation preference of $275,000, respectively	266,211	266,211
General Partner Units ( 86,616,736 and 68,841,296 units issued and outstanding at June 30, 2011 and December 31, 2010, respectively)	749,024	558,496
Limited Partners Units ( 5,268,360 and 5,363,151 units issued and outstanding at June 30, 2011 and December 31, 2010, respectively)	91,324	93,100
Accumulated Other Comprehensive Loss	(13,486)	(16,504)
Total Partners' Capital	1,093,073	901,303
Total Liabilities and Partners' Capital	$ 2,654,945	$ 2,711,786