CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Investment in real estate
Land	$ 4,609,337	$ 4,367,816
Depreciable property	15,943,139	15,554,740
Projects under development	194,254	160,190
Land held for development	404,846	325,200
Investment in real estate	21,151,576	20,407,946
Accumulated depreciation	(4,880,808)	(4,539,583)
Investment in real estate, net	16,270,768	15,868,363
Cash and cash equivalents	45,623	383,921
Investments in unconsolidated entities	17,906	12,327
Deposits - restricted	120,440	152,237
Escrow deposits - mortgage	10,462	10,692
Deferred financing costs, net	38,823	44,608
Other assets	164,523	187,155
Total assets	16,668,545	16,659,303
Liabilities:
Mortgage notes payable	3,948,115	4,111,487
Notes, net	5,354,038	5,609,574
Lines of credit	7,000	0
Accounts payable and accrued expenses	105,602	35,206
Accrued interest payable	78,869	88,121
Other liabilities	370,046	291,289
Security deposits	68,758	65,286
Distributions payable	108,048	179,079
Total liabilities	10,040,476	10,380,042
Commitments and contingencies
Partners’ Capital:
Accumulated other comprehensive (loss)	(197,754)	(196,718)
Noncontrolling Interests - Partially Owned Properties	75,428	74,306
Total liabilities and equity	16,668,545	16,659,303
OPERATING PARTNERSHIP
Investment in real estate
Land	4,609,337	4,367,816
Depreciable property	15,943,139	15,554,740
Projects under development	194,254	160,190
Land held for development	404,846	325,200
Investment in real estate	21,151,576	20,407,946
Accumulated depreciation	(4,880,808)	(4,539,583)
Investment in real estate, net	16,270,768	15,868,363
Cash and cash equivalents	45,623	383,921
Investments in unconsolidated entities	17,906	12,327
Deposits - restricted	120,440	152,237
Escrow deposits - mortgage	10,462	10,692
Deferred financing costs, net	38,823	44,608
Other assets	164,523	187,155
Total assets	16,668,545	16,659,303
Liabilities:
Mortgage notes payable	3,948,115	4,111,487
Notes, net	5,354,038	5,609,574
Lines of credit	7,000	0
Accounts payable and accrued expenses	105,602	35,206
Accrued interest payable	78,869	88,121
Other liabilities	370,046	291,289
Security deposits	68,758	65,286
Distributions payable	108,048	179,079
Total liabilities	10,040,476	10,380,042
Commitments and contingencies
Redeemable Limited Partners	414,219	416,404
Partners’ Capital:
Preference Units	50,000	200,000
General Partner	6,138,526	5,665,733
Limited Partners	147,650	119,536
Accumulated other comprehensive (loss)	(197,754)	(196,718)
Total partners’ capital	6,138,422	5,788,551
Noncontrolling Interests - Partially Owned Properties	75,428	74,306
Total capital	6,213,850	5,862,857
Total liabilities and equity	$ 16,668,545	$ 16,659,303