CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investment in real estate
Land	$ 5,864,046	$ 6,295,404
Depreciable property	18,027,087	19,851,504
Projects under development	1,122,376	1,343,919
Land held for development	168,843	184,556
Investment in real estate	25,182,352	27,675,383
Accumulated depreciation	(4,905,406)	(5,432,805)
Investment in real estate, net	20,276,946	22,242,578
Real estate held for sale	2,181,135	0
Cash and cash equivalents	42,276	40,080
Investments in unconsolidated entities	68,101	105,434
Deposits – restricted	55,893	72,303
Escrow deposits – mortgage	56,946	48,085
Deferred financing costs, net	54,004	58,380
Other assets	422,027	383,754
Total assets	23,157,328	22,950,614
Liabilities:
Mortgage notes payable	4,704,870	5,086,515
Notes, net	5,876,352	5,425,346
Line of credit and commercial paper	387,276	333,000
Accounts payable and accrued expenses	187,124	153,590
Accrued interest payable	85,221	89,540
Other liabilities	366,387	389,915
Security deposits	77,582	75,633
Distributions payable	209,378	188,566
Total liabilities	11,894,190	11,742,105
Partners' Capital:
Accumulated other comprehensive (loss)	(152,016)	(172,152)
Partially Owned Properties	4,608	124,909
Total liabilities and equity/capital	23,157,328	22,950,614
ERPOP [Member]
Investment in real estate
Land	5,864,046	6,295,404
Depreciable property	18,027,087	19,851,504
Projects under development	1,122,376	1,343,919
Land held for development	168,843	184,556
Investment in real estate	25,182,352	27,675,383
Accumulated depreciation	(4,905,406)	(5,432,805)
Investment in real estate, net	20,276,946	22,242,578
Real estate held for sale	2,181,135	0
Cash and cash equivalents	42,276	40,080
Investments in unconsolidated entities	68,101	105,434
Deposits – restricted	55,893	72,303
Escrow deposits – mortgage	56,946	48,085
Deferred financing costs, net	54,004	58,380
Other assets	422,027	383,754
Total assets	23,157,328	22,950,614
Liabilities:
Mortgage notes payable	4,704,870	5,086,515
Notes, net	5,876,352	5,425,346
Line of credit and commercial paper	387,276	333,000
Accounts payable and accrued expenses	187,124	153,590
Accrued interest payable	85,221	89,540
Other liabilities	366,387	389,915
Security deposits	77,582	75,633
Distributions payable	209,378	188,566
Total liabilities	11,894,190	11,742,105
Commitments and Contingencies
Redeemable Limited Partners	566,783	500,733
Partners' Capital:
Preference Units	37,280	50,000
General Partner	10,585,104	10,490,608
Limited Partners	221,379	214,411
Accumulated other comprehensive (loss)	(152,016)	(172,152)
Total partners' capital	10,691,747	10,582,867
Partially Owned Properties	4,608	124,909
Total capital	10,696,355	10,707,776
Total liabilities and equity/capital	$ 23,157,328	$ 22,950,614