CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUES
Rental income	$ 694,245	$ 662,001	$ 2,035,359	$ 1,942,492
Fee and asset management	2,044	2,077	6,413	7,596
Total revenues	696,289	664,078	2,041,772	1,950,088
EXPENSES
Property and maintenance	122,383	120,139	364,948	361,087
Real estate taxes and insurance	84,962	80,568	254,513	245,717
Property management	18,925	18,407	60,887	61,080
Fee and asset management	1,169	1,253	3,764	4,293
Depreciation	196,059	190,469	584,862	565,772
General and administrative	15,290	9,968	50,942	41,296
Total expenses	438,788	420,804	1,319,916	1,279,245
Operating income	257,501	243,274	721,856	670,843
Interest and other income	256	576	6,906	3,213
Other expenses	(1,139)	(4,976)	(2,839)	(7,179)
Interest:
Expense incurred, net	(114,205)	(118,251)	(333,622)	(347,224)
Amortization of deferred financing costs	(2,607)	(2,628)	(7,734)	(8,554)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	139,806	117,995	384,567	311,099
Income and other tax (expense) benefit	(329)	(260)	(698)	(1,146)
Income (loss) from investments in unconsolidated entities	(1,041)	(1,176)	14,388	(10,201)
Net gain on sales of real estate properties	66,939	113,641	295,692	128,544
Net (loss) gain on sales of land parcels	0	1,052	(1)	1,846
Income from continuing operations	205,375	231,252	693,948	430,142
Discontinued operations, net	81	(62)	350	1,500
Net income	205,456	231,190	694,298	431,642
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(986)	(708)	(2,473)	(1,800)
Net income attributable to controlling interests	196,692	221,744	665,634	413,569
ALLOCATION OF NET INCOME:
Premium on redemption of Preference Units	$ 0	$ 0	$ (2,789)	$ 0
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 0.54	$ 0.61	$ 1.82	$ 1.13
Net income available to Units	0.54	0.61	1.82	1.14
Earnings per Unit – diluted:
Income from continuing operations available to Units	0.53	0.61	1.80	1.13
Net income available to Units	$ 0.53	$ 0.61	$ 1.80	$ 1.13
Weighted Average Number of Shares/Units Outstanding, Diluted	380,663	377,954	380,423	377,228
ERPOP [Member]
REVENUES
Rental income	$ 694,245	$ 662,001	$ 2,035,359	$ 1,942,492
Fee and asset management	2,044	2,077	6,413	7,596
Total revenues	696,289	664,078	2,041,772	1,950,088
EXPENSES
Property and maintenance	122,383	120,139	364,948	361,087
Real estate taxes and insurance	84,962	80,568	254,513	245,717
Property management	18,925	18,407	60,887	61,080
Fee and asset management	1,169	1,253	3,764	4,293
Depreciation	196,059	190,469	584,862	565,772
General and administrative	15,290	9,968	50,942	41,296
Total expenses	438,788	420,804	1,319,916	1,279,245
Operating income	257,501	243,274	721,856	670,843
Interest and other income	256	576	6,906	3,213
Other expenses	(1,139)	(4,976)	(2,839)	(7,179)
Interest:
Expense incurred, net	(114,205)	(118,251)	(333,622)	(347,224)
Amortization of deferred financing costs	(2,607)	(2,628)	(7,734)	(8,554)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	139,806	117,995	384,567	311,099
Income and other tax (expense) benefit	(329)	(260)	(698)	(1,146)
Income (loss) from investments in unconsolidated entities	(1,041)	(1,176)	14,388	(10,201)
Net gain on sales of real estate properties	66,939	113,641	295,692	128,544
Net (loss) gain on sales of land parcels	0	1,052	(1)	1,846
Income from continuing operations	205,375	231,252	693,948	430,142
Discontinued operations, net	81	(62)	350	1,500
Net income	205,456	231,190	694,298	431,642
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(986)	(708)	(2,473)	(1,800)
Net income attributable to controlling interests	204,470	230,482	691,825	429,842
ALLOCATION OF NET INCOME:
Preference Units	833	1,037	2,557	3,109
Premium on redemption of Preference Units	0	0	2,789	0
General Partner	195,859	220,707	660,288	410,460
Limited Partners	7,778	8,738	26,191	16,273
Net income available to Units	$ 203,637	$ 229,445	$ 686,479	$ 426,733
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 0.54	$ 0.61	$ 1.82	$ 1.13
Net income available to Units	$ 0.54	$ 0.61	$ 1.82	$ 1.14
Weighted average Units outstanding	377,147	375,116	376,970	374,626
Earnings per Unit – diluted:
Income from continuing operations available to Units	$ 0.53	$ 0.61	$ 1.80	$ 1.13
Net income available to Units	$ 0.53	$ 0.61	$ 1.80	$ 1.13
Weighted Average Number of Shares/Units Outstanding, Diluted	380,663	377,954	380,423	377,228
Distributions declared per Unit outstanding	$ 0.5525	$ 0.50	$ 1.6575	$ 1.50