CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment in real estate
Land	$ 5,960,804	$ 5,996,024
Depreciable property	19,798,353	19,768,362
Projects under development	96,609	163,547
Land held for development	102,851	98,963
Investment in real estate	25,958,617	26,026,896
Accumulated depreciation	(6,173,047)	(6,040,378)
Investment in real estate, net	19,785,570	19,986,518
Cash and cash equivalents	44,453	50,647
Investments in unconsolidated entities	59,091	58,254
Restricted deposits	50,258	50,115
Other assets	444,498	425,065
Total assets	20,383,870	20,570,599
Liabilities:
Mortgage notes payable, net	2,894,344	3,618,722
Notes, net	5,530,815	5,038,812
Line of credit and commercial paper	234,318	299,757
Accounts payable and accrued expenses	167,481	114,766
Accrued interest payable	69,753	58,035
Other liabilities	335,957	341,852
Security deposits	64,748	65,009
Distributions payable	206,794	192,828
Total liabilities	9,504,210	9,729,781
Commitments and contingencies
Partners’ Capital:
Accumulated other comprehensive income (loss)	(77,734)	(88,612)
Noncontrolling Interests – Partially Owned Properties	1,293	4,708
Total liabilities and equity/capital	20,383,870	20,570,599
ERPOP [Member]
Investment in real estate
Land	5,960,804	5,996,024
Depreciable property	19,798,353	19,768,362
Projects under development	96,609	163,547
Land held for development	102,851	98,963
Investment in real estate	25,958,617	26,026,896
Accumulated depreciation	(6,173,047)	(6,040,378)
Investment in real estate, net	19,785,570	19,986,518
Cash and cash equivalents	44,453	50,647
Investments in unconsolidated entities	59,091	58,254
Restricted deposits	50,258	50,115
Other assets	444,498	425,065
Total assets	20,383,870	20,570,599
Liabilities:
Mortgage notes payable, net	2,894,344	3,618,722
Notes, net	5,530,815	5,038,812
Line of credit and commercial paper	234,318	299,757
Accounts payable and accrued expenses	167,481	114,766
Accrued interest payable	69,753	58,035
Other liabilities	335,957	341,852
Security deposits	64,748	65,009
Distributions payable	206,794	192,828
Total liabilities	9,504,210	9,729,781
Commitments and contingencies
Redeemable Limited Partners	354,567	366,955
Partners’ Capital:
Preference Units	37,280	37,280
General Partner	10,329,626	10,293,796
Limited Partners	234,628	226,691
Accumulated other comprehensive income (loss)	(77,734)	(88,612)
Total partners’ capital	10,523,800	10,469,155
Noncontrolling Interests – Partially Owned Properties	1,293	4,708
Total capital	10,525,093	10,473,863
Total liabilities and equity/capital	$ 20,383,870	$ 20,570,599