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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
REVENUES
Rental income	$ 632,405,000	$ 446,139,000	$ 1,151,918,000	$ 874,338,000
Fee and asset management	2,673,000	2,212,000	4,833,000	4,276,000
Total revenues	635,078,000	448,351,000	1,156,751,000	878,614,000
EXPENSES
Property and maintenance	117,819,000	85,423,000	220,417,000	173,819,000
Real estate taxes and insurance	78,547,000	53,422,000	145,400,000	104,268,000
Property management	22,031,000	20,937,000	44,520,000	44,276,000
Fee and asset management	1,577,000	1,180,000	3,223,000	2,487,000
Depreciation	327,985,000	145,438,000	528,328,000	289,273,000
General and administrative	16,086,000	13,391,000	32,582,000	27,079,000
Total expenses	564,045,000	319,791,000	974,470,000	641,202,000
Operating Income (Loss)	71,033,000	128,560,000	182,281,000	237,412,000
Interest and other income	249,000	258,000	504,000	427,000
Other expenses	(981,000)	(8,802,000)	(3,544,000)	(14,603,000)
Merger Expenses	(467,000)	(685,000)	(19,559,000)	(1,834,000)
Interest:
Expense incurred, net	(122,950,000)	(114,627,000)	(317,417,000)	(232,254,000)
Amortization of deferred financing costs	(4,353,000)	(4,017,000)	(11,301,000)	(6,945,000)
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of land parcels and discontinued operations	(57,469,000)	687,000	(169,036,000)	(17,797,000)
Income and other tax (expense) benefit	(428,000)	(213,000)	(833,000)	(380,000)
(Loss) from investments in unconsolidated entities due to operations	(1,175,000)	0	(1,530,000)	0
(Loss) from investments in unconsolidated entities due to merger expenses	(6,999,000)	0	(53,010,000)	0
Net gain on sales of land parcels	14,616,000	0	14,616,000	0
(Loss) income from continuing operations	(51,455,000)	474,000	(209,793,000)	(18,177,000)
Discontinued operations, net	388,187,000	107,841,000	1,607,559,000	278,659,000
Net income	336,732,000	108,315,000	1,397,766,000	260,482,000
Net (income) attributable to Noncontrolling Interests - Partially Owned Properties	815,000	(319,000)	790,000	(769,000)
Net income attributable to controlling interests	324,759,000	103,264,000	1,342,445,000	248,563,000
Earnings per Unit - basic:
(Loss) from continuing operations available to Common Shares	$ (0.138)	$ (0.011)	$ (0.581)	$ (0.082)
Net income available to Units	$ 0.900	$ 0.332	$ 3.844	$ 0.807
Earnings per Unit - diluted:
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.138)	$ (0.011)	$ (0.581)	$ (0.082)
Net income available to Units	$ 0.900	$ 0.332	$ 3.844	$ 0.807
OPERATING PARTNERSHIP
REVENUES
Rental income	632,405,000	446,139,000	1,151,918,000	874,338,000
Fee and asset management	2,673,000	2,212,000	4,833,000	4,276,000
Total revenues	635,078,000	448,351,000	1,156,751,000	878,614,000
EXPENSES
Property and maintenance	117,819,000	85,423,000	220,417,000	173,819,000
Real estate taxes and insurance	78,547,000	53,422,000	145,400,000	104,268,000
Property management	22,031,000	20,937,000	44,520,000	44,276,000
Fee and asset management	1,577,000	1,180,000	3,223,000	2,487,000
Depreciation	327,985,000	145,438,000	528,328,000	289,273,000
General and administrative	16,086,000	13,391,000	32,582,000	27,079,000
Total expenses	564,045,000	319,791,000	974,470,000	641,202,000
Operating Income (Loss)	71,033,000	128,560,000	182,281,000	237,412,000
Interest and other income	249,000	258,000	504,000	427,000
Other expenses	(981,000)	(8,802,000)	(3,544,000)	(14,603,000)
Merger Expenses	(467,000)	(685,000)	(19,559,000)	(1,834,000)
Interest:
Expense incurred, net	(122,950,000)	(114,627,000)	(317,417,000)	(232,254,000)
Amortization of deferred financing costs	(4,353,000)	(4,017,000)	(11,301,000)	(6,945,000)
(Loss) income before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of land parcels and discontinued operations	(57,469,000)	687,000	(169,036,000)	(17,797,000)
Income and other tax (expense) benefit	(428,000)	(213,000)	(833,000)	(380,000)
(Loss) from investments in unconsolidated entities due to operations	(1,175,000)	0	(1,530,000)	0
(Loss) from investments in unconsolidated entities due to merger expenses	(6,999,000)	0	(53,010,000)	0
Net gain on sales of land parcels	14,616,000	0	14,616,000	0
(Loss) income from continuing operations	(51,455,000)	474,000	(209,793,000)	(18,177,000)
Discontinued operations, net	388,187,000	107,841,000	1,607,559,000	278,659,000
Net income	336,732,000	108,315,000	1,397,766,000	260,482,000
Net (income) attributable to Noncontrolling Interests - Partially Owned Properties	815,000	(319,000)	790,000	(769,000)
Net income attributable to controlling interests	337,547,000	107,996,000	1,398,556,000	259,713,000
ALLOCATION OF NET INCOME:
Preference Units	1,036,000	3,467,000	2,072,000	6,933,000
General Partner	323,723,000	99,797,000	1,340,373,000	241,630,000
Limited Partners	12,788,000	4,732,000	56,111,000	11,150,000
Net income available to Units	$ 336,511,000	$ 104,529,000	$ 1,396,484,000	$ 252,780,000
Earnings per Unit - basic:
(Loss) from continuing operations available to Common Shares	$ (0.14)	$ (0.01)	$ (0.58)	$ (0.08)
Net income available to Units	$ 0.900	$ 0.332	$ 3.844	$ 0.807
Weighted average Units outstanding	373,403	314,255	362,390	313,133
Earnings per Unit - diluted:
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.14)	$ (0.01)	$ (0.58)	$ 0.08
Net income available to Units	$ 0.900	$ 0.332	$ 3.844	$ 0.807
Weighted average Units outstanding	373,403	314,255	362,390	313,133
Distributions declared per Unit outstanding	$ 0.40	$ 0.3375	$ 0.80	$ 0.6750