CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Comprehensive income:
Net income	$ 118,410	$ 204,160	$ 338,958	$ 354,101
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	5,908	3,507	11,995	3,507
Losses reclassified into earnings from other comprehensive income	4,516	4,668	9,307	9,251
Other comprehensive income (loss)	10,424	8,175	21,302	12,758
Comprehensive income	128,834	212,335	360,260	366,859
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(5,190)	(8,416)	(14,329)	(14,782)
Comprehensive income attributable to controlling interests	123,644	203,919	345,931	352,077
ERPOP [Member]
Comprehensive income:
Net income	118,410	204,160	338,958	354,101
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the period	5,908	3,507	11,995	3,507
Losses reclassified into earnings from other comprehensive income	4,516	4,668	9,307	9,251
Other comprehensive income (loss)	10,424	8,175	21,302	12,758
Comprehensive income	128,834	212,335	360,260	366,859
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(509)	(765)	(1,189)	(1,553)
Comprehensive income attributable to controlling interests	$ 128,325	$ 211,570	$ 359,071	$ 365,306