Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS:
Investment properties, at cost	$ 34,063,214	$ 29,657,046
Less - accumulated depreciation	8,827,205	8,388,130
Investment properties, net	25,236,009	21,268,916
Cash and cash equivalents	638,499	798,650
Tenant receivables and accrued revenue, net	423,917	486,731
Investment in unconsolidated entities, at equity	2,000,509	1,378,084
Investment in Klepierre, at equity	1,942,153
Deferred costs and other assets	1,745,496	1,633,544
Notes receivable from related party		651,000
Total assets	31,986,583	26,216,925
LIABILITIES:
Mortgages and other indebtedness	22,466,558	18,446,440
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,168,636	1,091,712
Cash distributions and losses in partnerships and joint ventures, at equity	730,636	695,569
Other liabilities	226,675	170,971
Total liabilities	24,592,505	20,404,692
Commitments and contingencies
Preferred units, at liquidation value, and noncontrolling redeemable interests in properties	263,479	267,945
Partners' Equity
Preferred units, 796,948 units outstanding. Liquidation value of $39,847	44,883	45,047
General Partner, 303,329,777 and 293,856,250 units outstanding, respectively	5,900,298	4,604,619
Limited Partners, 60,974,031 and 60,858,134 units outstanding, respectively	1,186,052	953,622
Total partners' equity	7,131,233	5,603,288
Nonredeemable noncontrolling deficit interests in properties, net	(634)	(59,000)
Total equity	7,130,599	5,544,288
Total liabilities and equity	$ 31,986,583	$ 26,216,925