CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUES
Rental income	$ 652,677	$ 623,951	$ 1,925,128	$ 1,840,170
Total revenues	652,867	624,122	1,925,691	1,840,702
EXPENSES
Property and maintenance	110,541	104,721	322,487	306,645
Real estate taxes and insurance	87,388	84,087	268,784	253,318
Property management	22,247	20,861	69,175	64,702
General and administrative	12,640	12,567	41,420	40,366
Depreciation	194,618	184,100	583,869	542,964
Impairment	702		702
Total expenses	428,136	406,336	1,286,437	1,207,995
Operating income	224,731	217,786	639,254	632,707
Interest and other income	7,864	3,945	14,860	5,708
Other expenses	(7,661)	(1,028)	(14,871)	(3,160)
Interest:
Expense incurred, net	(111,219)	(91,145)	(321,454)	(288,579)
Amortization of deferred financing costs	(3,276)	(2,064)	(9,054)	(6,447)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of real estate properties and land parcels	110,439	127,494	308,735	340,229
Income and other tax (expense) benefit	(280)	(228)	(767)	(710)
Income (loss) from investments in unconsolidated entities	(985)	(398)	(2,993)	(2,153)
Net gain (loss) on sales of real estate properties	114,672	17,328	256,834	141,761
Net gain (loss) on sales of land parcels			995	19,170
Net income	223,846	144,196	562,804	498,297
Partially Owned Properties	(750)	(801)	(1,939)	(2,354)
Net income attributable to controlling interests	$ 214,937	$ 138,229	$ 540,348	$ 478,012
Earnings per Unit – basic:
Net income available to Units	$ 0.58	$ 0.37	$ 1.46	$ 1.30
Earnings per Unit – diluted:
Net income available to Units	$ 0.58	$ 0.37	$ 1.46	$ 1.29
Weighted average Units outstanding	383,884	382,945	383,433	382,640
Fee and asset management
REVENUES
Fee and asset management	$ 190	$ 171	$ 563	$ 532
ERPOP [Member]
REVENUES
Rental income	652,677	623,951	1,925,128	1,840,170
Total revenues	652,867	624,122	1,925,691	1,840,702
EXPENSES
Property and maintenance	110,541	104,721	322,487	306,645
Real estate taxes and insurance	87,388	84,087	268,784	253,318
Property management	22,247	20,861	69,175	64,702
General and administrative	12,640	12,567	41,420	40,366
Depreciation	194,618	184,100	583,869	542,964
Impairment	702		702
Total expenses	428,136	406,336	1,286,437	1,207,995
Operating income	224,731	217,786	639,254	632,707
Interest and other income	7,864	3,945	14,860	5,708
Other expenses	(7,661)	(1,028)	(14,871)	(3,160)
Interest:
Expense incurred, net	(111,219)	(91,145)	(321,454)	(288,579)
Amortization of deferred financing costs	(3,276)	(2,064)	(9,054)	(6,447)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of real estate properties and land parcels	110,439	127,494	308,735	340,229
Income and other tax (expense) benefit	(280)	(228)	(767)	(710)
Income (loss) from investments in unconsolidated entities	(985)	(398)	(2,993)	(2,153)
Net gain (loss) on sales of real estate properties	114,672	17,328	256,834	141,761
Net gain (loss) on sales of land parcels			995	19,170
Net income	223,846	144,196	562,804	498,297
Partially Owned Properties	(750)	(801)	(1,939)	(2,354)
Net income attributable to controlling interests	223,096	143,395	560,865	495,943
ALLOCATION OF NET INCOME:
Preference Units	773	772	2,318	2,318
General Partner	214,164	137,457	538,030	475,694
Limited Partners	8,159	5,166	20,517	17,931
Net income available to Units	$ 222,323	$ 142,623	$ 558,547	$ 493,625
Earnings per Unit – basic:
Net income available to Units	$ 0.58	$ 0.37	$ 1.46	$ 1.30
Weighted average Units outstanding	380,912	379,906	380,791	379,716
Earnings per Unit – diluted:
Net income available to Units	$ 0.58	$ 0.37	$ 1.46	$ 1.29
Weighted average Units outstanding	383,884	382,945	383,433	382,640
Distributions declared per Unit outstanding	$ 0.54	$ 0.50375	$ 1.62	$ 1.51125
ERPOP [Member] | Fee and asset management
REVENUES
Fee and asset management	$ 190	$ 171	$ 563	$ 532