CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Fee and asset management	3,567	8,387	9,437
Total revenues	2,425,800	2,744,965	2,614,748
EXPENSES
Property and maintenance	406,823	479,160	473,098
Real estate taxes and insurance	317,387	339,802	325,401
Property management	82,015	86,206	85,065
General and administrative	57,840	64,664	50,679
Depreciation	705,649	765,895	758,861
Total expenses	1,569,714	1,735,727	1,693,104
Operating income	856,086	1,009,238	921,644
Interest and other income	65,773	7,372	4,462
Other expenses	(10,368)	(2,942)	(9,073)
Interest:
Expense incurred, net	(482,246)	(444,487)	(457,460)
Amortization of deferred financing costs	(12,633)	(10,801)	(11,088)
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	416,612	558,380	448,485
Income and other tax (expense) benefit	(1,613)	(917)	(1,394)
Income (loss) from investments in unconsolidated entities	4,801	15,025	(7,952)
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net gain (loss) on sales of land parcels	15,731	(1)	5,277
Income from continuing operations	4,479,586	907,621	657,101
Discontinued operations, net	518	397	1,582
Net income	4,480,104	908,018	658,683
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Net income attributable to controlling interests	4,292,163	870,120	631,308
ALLOCATION OF NET INCOME:
Premium on redemption of Preference Units	$ 0	$ (3,486)	$ 0
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 11.75	$ 2.37	$ 1.73
Net income available to Units	11.75	2.37	1.74
Earnings per Unit – diluted:
Income from continuing operations available to Units	11.68	2.36	1.72
Net income available to Units	$ 11.68	$ 2.36	$ 1.73
Weighted average Units outstanding	381,992	380,620	377,735
ERPOP [Member]
REVENUES
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Fee and asset management	3,567	8,387	9,437
Total revenues	2,425,800	2,744,965	2,614,748
EXPENSES
Property and maintenance	406,823	479,160	473,098
Real estate taxes and insurance	317,387	339,802	325,401
Property management	82,015	86,206	85,065
General and administrative	57,840	64,664	50,679
Depreciation	705,649	765,895	758,861
Total expenses	1,569,714	1,735,727	1,693,104
Operating income	856,086	1,009,238	921,644
Interest and other income	65,773	7,372	4,462
Other expenses	(10,368)	(2,942)	(9,073)
Interest:
Expense incurred, net	(482,246)	(444,487)	(457,460)
Amortization of deferred financing costs	(12,633)	(10,801)	(11,088)
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	416,612	558,380	448,485
Income and other tax (expense) benefit	(1,613)	(917)	(1,394)
Income (loss) from investments in unconsolidated entities	4,801	15,025	(7,952)
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net gain (loss) on sales of land parcels	15,731	(1)	5,277
Income from continuing operations	4,479,586	907,621	657,101
Discontinued operations, net	518	397	1,582
Net income	4,480,104	908,018	658,683
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Net income attributable to controlling interests	4,463,674	904,361	656,139
ALLOCATION OF NET INCOME:
Preference Units	3,091	3,357	4,145
Premium on redemption of Preference Units	0	3,486	0
General Partner	4,289,072	863,277	627,163
Limited Partners	171,511	34,241	24,831
Net income available to Units	$ 4,460,583	$ 897,518	$ 651,994
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 11.75	$ 2.37	$ 1.73
Net income available to Units	$ 11.75	$ 2.37	$ 1.74
Weighted average Units outstanding	378,829	377,074	374,899
Earnings per Unit – diluted:
Income from continuing operations available to Units	$ 11.68	$ 2.36	$ 1.72
Net income available to Units	$ 11.68	$ 2.36	$ 1.73
Weighted average Units outstanding	381,992	380,620	377,735
Distributions declared per Unit outstanding	$ 13.015	$ 2.21	$ 2.00