CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
REVENUES
Rental income	$ 496,111	$ 444,333	$ 974,096	$ 871,091
Fee and asset management	1,948	3,046	3,754	5,468
Total revenues	498,059	447,379	977,850	876,559
EXPENSES
Property and maintenance	103,092	100,045	211,418	202,801
Real estate taxes and insurance	56,701	52,350	110,332	105,496
Property management	20,767	20,264	43,148	40,756
Fee and asset management	1,009	1,605	1,957	3,563
Depreciation	159,087	162,697	321,181	302,964
General and administrative	10,908	10,089	22,341	20,808
Total expenses	351,564	347,050	710,377	676,388
Operating income	146,495	100,329	267,473	200,171
Interest and other income	281	2,625	1,292	4,845
Other expenses	(4,626)	(1,643)	(6,790)	(6,026)
Interest:
Expense incurred, net	(120,525)	(113,723)	(241,856)	(227,489)
Amortization of deferred financing costs	(4,444)	(2,300)	(7,454)	(5,295)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations	17,181	(14,712)	12,665	(33,794)
Income and other tax (expense) benefit	(203)	147	(387)	7
(Loss) from investments in unconsolidated entities		(459)		(923)
Net gain on sales of unconsolidated entities		5,079		5,557
Net gain on sales of land parcels	4,217		4,217
Income (loss) from continuing operations	21,195	(9,945)	16,495	(29,153)
Discontinued operations, net	560,558	20,034	698,324	97,098
Net income	581,753	10,089	714,819	67,945
Net (income) loss attributable to Noncontrolling Interests - Partially Owned Properties	(71)	185	(31)	435
Net income attributable to controlling interests	555,924	9,961	683,255	65,444
OPERATING PARTNERSHIP
REVENUES
Rental income	496,111	444,333	974,096	871,091
Fee and asset management	1,948	3,046	3,754	5,468
Total revenues	498,059	447,379	977,850	876,559
EXPENSES
Property and maintenance	103,092	100,045	211,418	202,801
Real estate taxes and insurance	56,701	52,350	110,332	105,496
Property management	20,767	20,264	43,148	40,756
Fee and asset management	1,009	1,605	1,957	3,563
Depreciation	159,087	162,697	321,181	302,964
General and administrative	10,908	10,089	22,341	20,808
Total expenses	351,564	347,050	710,377	676,388
Operating income	146,495	100,329	267,473	200,171
Interest and other income	281	2,625	1,292	4,845
Other expenses	(4,626)	(1,643)	(6,790)	(6,026)
Interest:
Expense incurred, net	(120,525)	(113,723)	(241,856)	(227,489)
Amortization of deferred financing costs	(4,444)	(2,300)	(7,454)	(5,295)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of unconsolidated entities and land parcels and discontinued operations	17,181	(14,712)	12,665	(33,794)
Income and other tax (expense) benefit	(203)	147	(387)	7
(Loss) from investments in unconsolidated entities		(459)		(923)
Net gain on sales of unconsolidated entities		5,079		5,557
Net gain on sales of land parcels	4,217		4,217
Income (loss) from continuing operations	21,195	(9,945)	16,495	(29,153)
Discontinued operations, net	560,558	20,034	698,324	97,098
Net income	581,753	10,089	714,819	67,945
Net (income) loss attributable to Noncontrolling Interests - Partially Owned Properties	(71)	185	(31)	435
Net income attributable to controlling interests	581,682	10,274	714,788	68,380
ALLOCATION OF NET INCOME:
Preference Units	3,467	3,618	6,933	7,238
General Partner	552,457	6,343	676,322	58,206
Limited Partners	25,758	313	31,533	2,936
Net income available to Units	$ 578,215	$ 6,656	$ 707,855	$ 61,142
Earnings per Unit - basic:
Income (loss) from continuing operations available to Units	$ 0.06	$ (0.05)	$ 0.03	$ (0.12)
Net income available to Units	$ 1.875	$ 0.022	$ 2.302	$ 0.207
Weighted average Units outstanding	307,954	295,898	307,106	295,177
Earnings per Unit - diluted:
Income (loss) from continuing operations available to Units	$ 0.06	$ (0.05)	$ 0.03	$ (0.12)
Net income available to Units	$ 1.85	$ 0.02	$ 2.27	$ 0.21
Weighted average Units outstanding	312,199	295,898	311,380	295,177
Distributions declared per Unit outstanding	$ 0.3375	$ 0.3375	$ 0.6750	$ 0.6750