CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUES
Rental income	$ 632,831	$ 603,920
Fee and asset management	185	180
Total revenues	633,016	604,100
EXPENSES
Property and maintenance	108,202	102,608
Real estate taxes and insurance	91,914	81,728
Property management	23,444	22,252
General and administrative	16,278	14,173
Depreciation	196,309	178,968
Total expenses	436,147	399,729
Operating income	196,869	204,371
Interest and other income	5,880	601
Other expenses	(3,441)	(1,090)
Interest:
Expense incurred, net	(116,104)	(106,210)
Amortization of deferred financing costs	(3,679)	(2,296)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of real estate properties and land parcels	79,525	95,376
Income and other tax (expense) benefit	(213)	(262)
Income (loss) from investments in unconsolidated entities	(977)	(1,073)
Net gain (loss) on sales of real estate properties	142,213	36,707
Net gain (loss) on sales of land parcels		19,193
Net income	220,548	149,941
Partially Owned Properties	(680)	(788)
Net income attributable to controlling interests	$ 211,809	$ 143,742
Earnings per Unit – basic:
Net income available to Units	$ 0.57	$ 0.39
Earnings per Unit – diluted:
Net income available to Units	$ 0.57	$ 0.39
Weighted average Units outstanding	383,018	382,280
ERPOP [Member]
REVENUES
Rental income	$ 632,831	$ 603,920
Fee and asset management	185	180
Total revenues	633,016	604,100
EXPENSES
Property and maintenance	108,202	102,608
Real estate taxes and insurance	91,914	81,728
Property management	23,444	22,252
General and administrative	16,278	14,173
Depreciation	196,309	178,968
Total expenses	436,147	399,729
Operating income	196,869	204,371
Interest and other income	5,880	601
Other expenses	(3,441)	(1,090)
Interest:
Expense incurred, net	(116,104)	(106,210)
Amortization of deferred financing costs	(3,679)	(2,296)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of real estate properties and land parcels	79,525	95,376
Income and other tax (expense) benefit	(213)	(262)
Income (loss) from investments in unconsolidated entities	(977)	(1,073)
Net gain (loss) on sales of real estate properties	142,213	36,707
Net gain (loss) on sales of land parcels		19,193
Net income	220,548	149,941
Partially Owned Properties	(680)	(788)
Net income attributable to controlling interests	219,868	149,153
ALLOCATION OF NET INCOME:
Preference Units	773	773
General Partner	211,036	142,969
Limited Partners	8,059	5,411
Net income available to Units	$ 219,095	$ 148,380
Earnings per Unit – basic:
Net income available to Units	$ 0.57	$ 0.39
Weighted average Units outstanding	380,663	379,504
Earnings per Unit – diluted:
Net income available to Units	$ 0.57	$ 0.39
Weighted average Units outstanding	383,018	382,280
Distributions declared per Unit outstanding	$ 0.54	$ 0.50375