CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investment in real estate
Land	$ 6,357,580	$ 6,295,404
Depreciable property	20,024,497	19,851,504
Projects under development	1,269,784	1,343,919
Land held for development	143,997	184,556
Investment in real estate	27,795,858	27,675,383
Real Estate Investment Property, Accumulated Depreciation	(5,600,485)	(5,432,805)
Investment in real estate, net	22,195,373	22,242,578
Cash and cash equivalents	49,418	40,080
Investments in unconsolidated entities	89,284	105,434
Deposits - restricted	203,800	72,303
Escrow deposits - mortgage	50,659	48,085
Deferred financing costs, net	55,791	58,380
Other assets	384,723	383,754
Total assets	23,029,048	22,950,614
Liabilities:
Mortgage notes payable	4,957,876	5,086,515
Notes, net	5,430,806	5,425,346
Line of credit and commercial paper	470,826	333,000
Accounts payable and accrued expenses	202,110	153,590
Accrued interest payable	84,670	89,540
Other liabilities	383,057	389,915
Security deposits	75,294	75,633
Distributions payable	208,954	188,566
Total liabilities	11,813,593	11,742,105
Commitments and contingencies
Partners’ Capital:
Accumulated other comprehensive (loss)	(180,022)	(172,152)
Noncontrolling Interests - Partially Owned Properties	122,661	124,909
Total liabilities and equity	23,029,048	22,950,614
OPERATING PARTNERSHIP
Investment in real estate
Land	6,357,580	6,295,404
Depreciable property	20,024,497	19,851,504
Projects under development	1,269,784	1,343,919
Land held for development	143,997	184,556
Investment in real estate	27,795,858	27,675,383
Real Estate Investment Property, Accumulated Depreciation	(5,600,485)	(5,432,805)
Investment in real estate, net	22,195,373	22,242,578
Cash and cash equivalents	49,418	40,080
Investments in unconsolidated entities	89,284	105,434
Deposits - restricted	203,800	72,303
Escrow deposits - mortgage	50,659	48,085
Deferred financing costs, net	55,791	58,380
Other assets	384,723	383,754
Total assets	23,029,048	22,950,614
Liabilities:
Mortgage notes payable	4,957,876	5,086,515
Notes, net	5,430,806	5,425,346
Line of credit and commercial paper	470,826	333,000
Accounts payable and accrued expenses	202,110	153,590
Accrued interest payable	84,670	89,540
Other liabilities	383,057	389,915
Security deposits	75,294	75,633
Distributions payable	208,954	188,566
Total liabilities	11,813,593	11,742,105
Commitments and contingencies
Redeemable Limited Partners	541,866	500,733
Partners’ Capital:
Preferred Units	40,180	50,000
General Partner	10,471,204	10,490,608
Limited Partners	219,566	214,411
Accumulated other comprehensive (loss)	(180,022)	(172,152)
Total partners’ capital	10,550,928	10,582,867
Noncontrolling Interests - Partially Owned Properties	122,661	124,909
Total capital	10,673,589	10,707,776
Total liabilities and equity	$ 23,029,048	$ 22,950,614