Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2015	Dec. 31, 2014
ASSETS:
Investment properties at cost	$ 32,537,403	$ 31,318,532
Less - accumulated depreciation	9,146,094	8,950,747
Investment properties at cost, net	23,391,309	22,367,785
Cash and cash equivalents	833,732	612,282
Tenant receivables and accrued revenue, net	523,734	580,197
Investment in unconsolidated entities, at equity	2,158,205	2,378,800
Investment in Klepierre, at equity	1,723,676	1,786,477
Deferred costs and other assets	1,851,798	1,806,789
Total assets	30,482,454	29,532,330
LIABILITIES:
Mortgages and unsecured indebtedness	21,694,055	20,852,993
Accounts payable, accrued expenses, intangibles, and deferred revenues	1,122,444	1,259,681
Cash distributions and losses in partnerships and joint ventures, at equity	1,372,575	1,167,163
Other liabilities	295,853	275,451
Total liabilities	$ 24,484,927	$ 23,555,288
Commitments and contingencies
Preferred units, at liquidation value	$ 25,537	$ 25,537
Partners' Equity
Preferred units, 796,948 units outstanding. Liquidation value of $39,847	43,980	44,062
General Partner, 311,268,775 and 310,787,910 units outstanding, respectively	5,069,399	5,049,115
Limited Partners, 52,764,731 and 52,846,682 units outstanding, respectively	859,339	858,557
Total partners' equity	5,972,718	5,951,734
Noncontrolling nonredeemable deficit interests in properties, net	(728)	(229)
Total equity	5,971,990	5,951,505
Total liabilities and equity	$ 30,482,454	$ 29,532,330