CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUES
Rental income	$ 626,880,000	$ 448,647,000	$ 1,749,374,000	$ 1,295,431,000
Fee and asset management	2,566,000	3,052,000	7,399,000	7,328,000
Total revenues	629,446,000	451,699,000	1,756,773,000	1,302,759,000
EXPENSES
Property and maintenance	119,632,000	86,682,000	333,202,000	254,009,000
Real estate taxes and insurance	76,255,000	53,064,000	218,777,000	154,633,000
Property management	18,875,000	18,493,000	63,395,000	62,769,000
Fee and asset management	1,516,000	1,108,000	4,739,000	3,595,000
Depreciation	277,336,000	139,337,000	798,121,000	422,148,000
General and administrative	14,438,000	10,083,000	47,018,000	37,162,000
Total expenses	508,052,000	308,767,000	1,465,252,000	934,316,000
Operating Income	121,394,000	142,932,000	291,521,000	368,443,000
Interest and other income	816,000	70,087,000	1,320,000	70,514,000
Other expenses	(3,986,000)	(3,984,000)	(7,530,000)	(18,587,000)
Merger Expenses	(182,000)	(87,000)	(19,741,000)	(1,921,000)
Interest:
Expense incurred, net	(120,035,000)	(113,222,000)	(437,452,000)	(345,476,000)
Amortization of deferred financing costs	(4,335,000)	(3,320,000)	(15,636,000)	(10,265,000)
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain (loss) on sales of unconsolidated entities and land parcels and discontinued operations	(6,328,000)	92,406,000	(187,518,000)	62,708,000
Income and other tax (expense) benefit	(493,000)	(222,000)	(1,326,000)	(602,000)
(Loss) from investments in unconsolidated entities due to operations	(1,454,000)	(3,000)	(2,984,000)	(3,000)
(Loss) from investments in unconsolidated entities due to merger expenses	(1,771,000)	0	(54,781,000)	0
Net Gain on Sales of Unconsolidated Entities	16,000	0	16,000	0
Net gain (loss) on sales of land parcels	(2,437,000)	0	12,179,000	0
(Loss) income from continuing operations	(12,467,000)	92,181,000	(234,414,000)	62,103,000
Discontinued operations, net	404,184,000	144,142,000	2,023,897,000	434,702,000
Net income	391,717,000	236,323,000	1,789,483,000	496,805,000
Net (income) loss attributable to Noncontrolling Interests - Partially Owned Properties	311,000	312,000	1,101,000	(457,000)
Net income attributable to controlling interests	377,192,000	226,139,000	1,719,637,000	474,702,000
ALLOCATION OF NET INCOME:
Redemption Premium	0	(5,150,000)	0	(5,150,000)
Earnings per Unit - basic:
(Loss) income from continuing operations available to Common Shares	$ (0.035)	$ 0.269	$ (0.644)	$ 0.150
Net income available to Units	$ 1.045	$ 0.725	$ 4.871	$ 1.534
Earnings per Unit - diluted:
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.035)	$ 0.267	$ (0.644)	$ 0.149
Net income available to Units	$ 1.045	$ 0.719	$ 4.871	$ 1.519
Weighted average Units outstanding	359,811		352,414
OPERATING PARTNERSHIP
REVENUES
Rental income	626,880,000	448,647,000	1,749,374,000	1,295,431,000
Fee and asset management	2,566,000	3,052,000	7,399,000	7,328,000
Total revenues	629,446,000	451,699,000	1,756,773,000	1,302,759,000
EXPENSES
Property and maintenance	119,632,000	86,682,000	333,202,000	254,009,000
Real estate taxes and insurance	76,255,000	53,064,000	218,777,000	154,633,000
Property management	18,875,000	18,493,000	63,395,000	62,769,000
Fee and asset management	1,516,000	1,108,000	4,739,000	3,595,000
Depreciation	277,336,000	139,337,000	798,121,000	422,148,000
General and administrative	14,438,000	10,083,000	47,018,000	37,162,000
Total expenses	508,052,000	308,767,000	1,465,252,000	934,316,000
Operating Income	121,394,000	142,932,000	291,521,000	368,443,000
Interest and other income	816,000	70,087,000	1,320,000	70,514,000
Other expenses	(3,986,000)	(3,984,000)	(7,530,000)	(18,587,000)
Merger Expenses	(182,000)	(87,000)	(19,741,000)	(1,921,000)
Interest:
Expense incurred, net	(120,035,000)	(113,222,000)	(437,452,000)	(345,476,000)
Amortization of deferred financing costs	(4,335,000)	(3,320,000)	(15,636,000)	(10,265,000)
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain (loss) on sales of unconsolidated entities and land parcels and discontinued operations	(6,328,000)	92,406,000	(187,518,000)	62,708,000
Income and other tax (expense) benefit	(493,000)	(222,000)	(1,326,000)	(602,000)
(Loss) from investments in unconsolidated entities due to operations	(1,454,000)	(3,000)	(2,984,000)	(3,000)
(Loss) from investments in unconsolidated entities due to merger expenses	(1,771,000)	0	(54,781,000)	0
Net Gain on Sales of Unconsolidated Entities	16,000	0	16,000	0
Net gain (loss) on sales of land parcels	(2,437,000)	0	12,179,000	0
(Loss) income from continuing operations	(12,467,000)	92,181,000	(234,414,000)	62,103,000
Discontinued operations, net	404,184,000	144,142,000	2,023,897,000	434,702,000
Net income	391,717,000	236,323,000	1,789,483,000	496,805,000
Net (income) loss attributable to Noncontrolling Interests - Partially Owned Properties	311,000	312,000	1,101,000	(457,000)
Net income attributable to controlling interests	392,028,000	236,635,000	1,790,584,000	496,348,000
ALLOCATION OF NET INCOME:
Preference Units	1,037,000	2,386,000	3,109,000	9,319,000
Redemption Premium	0	(5,150,000)	0	(5,150,000)
General Partner	376,155,000	218,603,000	1,716,528,000	460,233,000
Limited Partners	14,836,000	10,496,000	70,947,000	21,646,000
Net income available to Units	$ 390,991,000	$ 229,099,000	$ 1,787,475,000	$ 481,879,000
Earnings per Unit - basic:
(Loss) income from continuing operations available to Common Shares	$ (0.035)	$ 0.269	$ (0.644)	$ 0.150
Net income available to Units	$ 1.045	$ 0.725	$ 4.871	$ 1.534
Weighted average Units outstanding	373,547	315,513	366,150	313,932
Earnings per Unit - diluted:
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.035)	$ 0.267	$ (0.644)	$ 0.149
Net income available to Units	$ 1.045	$ 0.719	$ 4.871	$ 1.519
Weighted average Units outstanding	373,547	318,773	366,150	317,265
Distributions declared per Unit outstanding	$ 0.40	$ 0.3375	$ 1.20	$ 1.0125