EPLP - Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 515,691,000	$ 599,332,000	$ 464,448,000
Adjustments to reconcile net income to net cash provided by operating activities:
Straight-lined rents	9,672,000	(19,426,000)	(1,218,000)
Depreciation and amortization	520,066,000	525,497,000	483,750,000
Amortization of discount on marketable securities	0	(19,075,000)	(28,491,000)
Amortization of discount and debt financing costs, net	9,538,000	6,674,000	5,689,000
Gain on sale of marketable securities	(3,400,000)	(2,131,000)	(1,271,000)
Income from early redemption of notes receivable	(4,939,000)	0	0
Provision for credit losses	141,000	687,000	0
Unrealized gains on equity securities recognized through income	(33,104,000)	(12,515,000)	(5,710,000)
Company's share of gain on the sales of co-investments	0	(2,225,000)	(51,097,000)
Earnings from co-investments	(111,721,000)	(64,287,000)	(61,039,000)
Operating distributions from co-investments	104,833,000	74,419,000	99,277,000
Accrued interest from notes and other receivables	(15,902,000)	(3,683,000)	(6,012,000)
Impairment loss	0	1,825,000	7,105,000
(Gain) loss on the sale of real estate and land	(142,993,000)	(64,967,000)	3,164,000
Equity-based compensation	7,308,000	8,157,000	7,010,000
Loss (gain) on early retirement of debt, net	19,010,000	22,883,000	(3,717,000)
Gain on remeasurement of co-investment	(2,260,000)	(234,694,000)	(31,535,000)
Changes in operating assets and liabilities:
Prepaid expenses, receivables, operating lease right-of-use assets, and other assets	4,878,000	(3,730,000)	6,969,000
Accounts payable, accrued liabilities, and operating lease liabilities	22,298,000	(10,382,000)	29,551,000
Other liabilities	6,143,000	749,000	2,206,000
Net cash provided by operating activities	905,259,000	803,108,000	919,079,000
Additions to real estate:
Acquisitions of real estate and acquisition related capital expenditures, net of cash acquired	(153,481,000)	(460,421,000)	(133,825,000)
Redevelopment	(61,671,000)	(48,980,000)	(70,295,000)
Development acquisitions of and additions to real estate under development	(49,784,000)	(108,781,000)	(158,234,000)
Capital expenditures on rental properties	(121,195,000)	(90,085,000)	(101,689,000)
Investments in notes receivable	(245,144,000)	(135,343,000)	(231,400,000)
Collections of notes and other receivables	104,405,000	98,711,000	168,720,000
Proceeds from insurance for property losses	879,000	723,000	3,734,000
Proceeds from dispositions of real estate	297,454,000	339,165,000	23,214,000
Contributions to co-investments	(306,266,000)	(114,017,000)	(402,284,000)
Changes in refundable deposits	(9,486,000)	96,000	5,000
Purchases of marketable securities	(23,805,000)	(83,379,000)	(46,458,000)
Sales and maturities of marketable securities	16,577,000	113,465,000	147,531,000
Non-operating distributions from co-investments	154,120,000	71,946,000	273,290,000
Net cash used in investing activities	(397,397,000)	(416,900,000)	(527,691,000)
Cash flows from financing activities:
Proceeds from unsecured debt and mortgage notes	745,505,000	1,452,808,000	1,045,290,000
Payments on unsecured debt and mortgage notes	(1,053,501,000)	(916,209,000)	(1,026,616,000)
Proceeds from lines of credit	1,050,589,000	1,038,426,000	1,939,213,000
Repayments of lines of credit	(709,332,000)	(1,093,426,000)	(1,884,213,000)
Retirement of common stock	(9,172,000)	(269,315,000)	(56,989,000)
Additions to deferred charges	(8,350,000)	(13,772,000)	(10,898,000)
Payments related to debt prepayment penalties	(18,342,000)	(19,605,000)	(1,406,000)
Net proceeds from issuance of common stock	(455,000)	(296,000)	72,539,000
Net proceeds from stock options exercised	58,497,000	14,865,000	37,467,000
Payments related to tax withholding for share-based compensation	(5,445,000)	(5,664,000)	(3,688,000)
Contributions from noncontrolling interest	1,900,000	0	0
Distributions to noncontrolling interest	(29,379,000)	(30,990,000)	(27,993,000)
Redemption of noncontrolling interest	(8,457,000)	(3,113,000)	(36,568,000)
Redemption of redeemable noncontrolling interest	(4,463,000)	(872,000)	(73,000)
Common stock dividends paid	(542,860,000)	(536,098,000)	(507,754,000)
Net cash used in financing activities	(533,265,000)	(383,261,000)	(461,689,000)
Net (decrease) increase in unrestricted and restricted cash and cash equivalents	(25,403,000)	2,947,000	(70,301,000)
Unrestricted and restricted cash and cash equivalents at beginning of period	84,041,000	81,094,000	151,395,000
Unrestricted and restricted cash and cash equivalents at end of period	58,638,000	84,041,000	81,094,000
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest	194,203,000	211,732,000	194,418,000
Interest capitalized	6,153,000	14,615,000	24,169,000
Operating cash flows from operating leases	6,963,000	6,892,000	6,811,000
Supplemental disclosure of noncash investing and financing activities:
Issuance of DownREIT units in connection with acquisition of real estate	0	0	65,472,000
Transfers between real estate under development and rental properties, net	328,393,000	253,039,000	19,812,000
Transfer from real estate under development to co-investments	3,068,000	1,739,000	671,000
Reclassifications to (from) redeemable noncontrolling interest from additional paid in capital and noncontrolling interest	6,890,000	(4,299,000)	2,008,000
Initial recognition of operating lease right-of-use assets	0	0	77,645,000
Initial recognition of operating lease liabilities	0	0	79,693,000
Debt assumed in connection with acquisition	0	0	143,006,000
Essex Portfolio, L.P.
Cash flows from operating activities:
Net income	515,691,000	599,332,000	464,448,000
Adjustments to reconcile net income to net cash provided by operating activities:
Straight-lined rents	9,672,000	(19,426,000)	(1,218,000)
Depreciation and amortization	520,066,000	525,497,000	483,750,000
Amortization of discount on marketable securities	0	(19,075,000)	(28,491,000)
Amortization of discount and debt financing costs, net	9,538,000	6,674,000	5,689,000
Gain on sale of marketable securities	(3,400,000)	(2,131,000)	(1,271,000)
Income from early redemption of notes receivable	(4,939,000)	0	0
Provision for credit losses	141,000	687,000	0
Unrealized gains on equity securities recognized through income	(33,104,000)	(12,515,000)	(5,710,000)
Company's share of gain on the sales of co-investments	0	(2,225,000)	(51,097,000)
Earnings from co-investments	(111,721,000)	(64,287,000)	(61,039,000)
Operating distributions from co-investments	104,833,000	74,419,000	99,277,000
Accrued interest from notes and other receivables	(15,902,000)	(3,683,000)	(6,012,000)
Impairment loss	0	1,825,000	7,105,000
(Gain) loss on the sale of real estate and land	(142,993,000)	(64,967,000)	3,164,000
Equity-based compensation	7,308,000	8,157,000	7,010,000
Loss (gain) on early retirement of debt, net	19,010,000	22,883,000	(3,717,000)
Gain on remeasurement of co-investment	(2,260,000)	(234,694,000)	(31,535,000)
Changes in operating assets and liabilities:
Prepaid expenses, receivables, operating lease right-of-use assets, and other assets	4,878,000	(3,730,000)	6,969,000
Accounts payable, accrued liabilities, and operating lease liabilities	22,298,000	(10,382,000)	29,551,000
Other liabilities	6,143,000	749,000	2,206,000
Net cash provided by operating activities	905,259,000	803,108,000	919,079,000
Additions to real estate:
Acquisitions of real estate and acquisition related capital expenditures, net of cash acquired	(153,481,000)	(460,421,000)	(133,825,000)
Redevelopment	(61,671,000)	(48,980,000)	(70,295,000)
Development acquisitions of and additions to real estate under development	(49,784,000)	(108,781,000)	(158,234,000)
Capital expenditures on rental properties	(121,195,000)	(90,085,000)	(101,689,000)
Investments in notes receivable	(245,144,000)	(135,343,000)	(231,400,000)
Collections of notes and other receivables	104,405,000	98,711,000	168,720,000
Proceeds from insurance for property losses	879,000	723,000	3,734,000
Proceeds from dispositions of real estate	297,454,000	339,165,000	23,214,000
Contributions to co-investments	(306,266,000)	(114,017,000)	(402,284,000)
Changes in refundable deposits	(9,486,000)	96,000	5,000
Purchases of marketable securities	(23,805,000)	(83,379,000)	(46,458,000)
Sales and maturities of marketable securities	16,577,000	113,465,000	147,531,000
Non-operating distributions from co-investments	154,120,000	71,946,000	273,290,000
Net cash used in investing activities	(397,397,000)	(416,900,000)	(527,691,000)
Cash flows from financing activities:
Proceeds from unsecured debt and mortgage notes	745,505,000	1,452,808,000	1,045,290,000
Payments on unsecured debt and mortgage notes	(1,053,501,000)	(916,209,000)	(1,026,616,000)
Proceeds from lines of credit	1,050,589,000	1,038,426,000	1,939,213,000
Repayments of lines of credit	(709,332,000)	(1,093,426,000)	(1,884,213,000)
Retirement of common stock	(9,172,000)	(269,315,000)	(56,989,000)
Additions to deferred charges	(8,350,000)	(13,772,000)	(10,898,000)
Payments related to debt prepayment penalties	(18,342,000)	(19,605,000)	(1,406,000)
Net proceeds from issuance of common stock	(455,000)	(296,000)	72,539,000
Net proceeds from stock options exercised	58,497,000	14,865,000	37,467,000
Payments related to tax withholding for share-based compensation	(5,445,000)	(5,664,000)	(3,688,000)
Contributions from noncontrolling interest	1,900,000	0	0
Distributions to noncontrolling interest	(8,369,000)	(8,409,000)	(7,288,000)
Redemption of noncontrolling interest	(8,457,000)	(3,113,000)	(36,568,000)
Redemption of redeemable noncontrolling interest	(4,463,000)	(872,000)	(73,000)
Common stock dividends paid	(563,870,000)	(558,679,000)	(528,459,000)
Net cash used in financing activities	(533,265,000)	(383,261,000)	(461,689,000)
Net (decrease) increase in unrestricted and restricted cash and cash equivalents	(25,403,000)	2,947,000	(70,301,000)
Unrestricted and restricted cash and cash equivalents at beginning of period	84,041,000	81,094,000	151,395,000
Unrestricted and restricted cash and cash equivalents at end of period	58,638,000	84,041,000	81,094,000
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest	194,203,000	211,732,000	194,418,000
Interest capitalized	6,153,000	14,615,000	24,169,000
Operating cash flows from operating leases	6,963,000	6,892,000	6,811,000
Supplemental disclosure of noncash investing and financing activities:
Issuance of DownREIT units in connection with acquisition of real estate	0	0	65,472,000
Transfers between real estate under development and rental properties, net	328,393,000	253,039,000	19,812,000
Transfer from real estate under development to co-investments	3,068,000	1,739,000	671,000
Reclassifications to (from) redeemable noncontrolling interest from additional paid in capital and noncontrolling interest	6,890,000	(4,299,000)	2,008,000
Initial recognition of operating lease right-of-use assets	0	0	77,645,000
Initial recognition of operating lease liabilities	0	0	79,693,000
Debt assumed in connection with acquisition	$ 0	$ 0	$ 143,006,000