CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
REVENUES
Rental income	$ 2,735,180	$ 2,463,997	$ 2,571,705
EXPENSES
Property and maintenance	483,865	453,532	440,998
Real estate taxes and insurance	388,412	397,105	381,562
Property management	110,304	98,155	93,825
General and administrative	58,710	56,506	48,305
Depreciation	882,168	838,272	820,832
Total expenses	1,923,459	1,843,570	1,785,522
Net gain (loss) on sales of real estate properties	304,325	1,072,183	531,807
Impairment		(16,769)
Operating income	1,116,046	1,675,841	1,317,990
Interest and other income	2,193	25,666	5,935
Other expenses	(13,664)	(19,275)	(17,510)
Interest:
Expense incurred, net	(282,920)	(272,473)	(365,073)
Amortization of deferred financing costs	(8,729)	(8,737)	(8,939)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	812,926	1,401,022	932,403
Income and other tax (expense) benefit	(900)	(915)	(852)
Income (loss) from investments in unconsolidated entities	(5,031)	(3,398)	(3,284)
Net gain (loss) on sales of land parcels		5	34,234
Net income	806,995	1,396,714	962,501
Net (income) loss attributable to Noncontrolling Interests - Partially Owned Properties	(3,774)	(17,964)	(14,855)
Net income attributable to controlling interests	$ 776,911	$ 1,332,850	$ 913,636
Earnings per Unit – basic:
Net income available to Units	$ 2.06	$ 3.56	$ 2.45
Earnings per Unit – diluted:
Net income available to Units	$ 2.05	$ 3.54	$ 2.45
Weighted average Units outstanding	389,450	388,089	385,874
ERPOP [Member]
REVENUES
Rental income	$ 2,735,180	$ 2,463,997	$ 2,571,705
EXPENSES
Property and maintenance	483,865	453,532	440,998
Real estate taxes and insurance	388,412	397,105	381,562
Property management	110,304	98,155	93,825
General and administrative	58,710	56,506	48,305
Depreciation	882,168	838,272	820,832
Total expenses	1,923,459	1,843,570	1,785,522
Net gain (loss) on sales of real estate properties	304,325	1,072,183	531,807
Impairment		(16,769)
Operating income	1,116,046	1,675,841	1,317,990
Interest and other income	2,193	25,666	5,935
Other expenses	(13,664)	(19,275)	(17,510)
Interest:
Expense incurred, net	(282,920)	(272,473)	(365,073)
Amortization of deferred financing costs	(8,729)	(8,737)	(8,939)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	812,926	1,401,022	932,403
Income and other tax (expense) benefit	(900)	(915)	(852)
Income (loss) from investments in unconsolidated entities	(5,031)	(3,398)	(3,284)
Net gain (loss) on sales of land parcels		5	34,234
Net income	806,995	1,396,714	962,501
Net (income) loss attributable to Noncontrolling Interests - Partially Owned Properties	(3,774)	(17,964)	(14,855)
Net income attributable to controlling interests	803,221	1,378,750	947,646
ALLOCATION OF NET INCOME:
Preference Units	3,090	3,090	3,090
General Partner	773,821	1,329,760	910,546
Limited Partners	26,310	45,900	34,010
Net income available to Units	$ 800,131	$ 1,375,660	$ 944,556
Earnings per Unit – basic:
Net income available to Units	$ 2.06	$ 3.56	$ 2.45
Weighted average Units outstanding	388,045	386,096	384,794
Earnings per Unit – diluted:
Net income available to Units	$ 2.05	$ 3.54	$ 2.45
Weighted average Units outstanding	389,450	388,089	385,874