Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Rental properties:
Land and land improvements	$ 2,997,904	$ 2,929,009
Buildings and improvements	12,414,770	12,132,736
Total rental properties	15,412,674	15,061,745
Less: accumulated depreciation	(4,509,243)	(4,133,959)
Net real estate	10,903,431	10,927,786
Real estate under development	212,426	386,047
Co-investments	1,081,861	1,018,010
Real estate held for sale	0	57,938
Total real estate	12,197,718	12,389,781
Cash and cash equivalents-unrestricted	49,910	73,629
Cash and cash equivalents-restricted	11,042	10,412
Marketable securities, net of allowance for credit losses of zero as of both September 30, 2021 and December 31, 2020	183,140	147,768
Notes and other receivables, net of allowance for credit losses of $0.7 million and $0.8 million as of September 30, 2021 and December 31, 2020, respectively (includes related party receivables of $33.9 million and $4.7 million as of September 30, 2021 and December 31, 2020, respectively)	213,985	195,104
Operating lease right-of-use assets	69,756	72,143
Prepaid expenses and other assets	63,090	47,340
Total assets	12,788,641	12,936,177
LIABILITIES AND EQUITY/CAPITAL
Unsecured debt, net	5,405,520	5,607,985
Mortgage notes payable, net	640,118	643,550
Lines of credit	42,662	0
Accounts payable and accrued liabilities	220,428	152,855
Construction payable	32,777	31,417
Dividends payable	143,036	141,917
Distributions in excess of investments in co-investments	29,037	0
Operating lease liabilities	71,520	74,037
Liabilities associated with real estate held for sale	0	29,845
Other liabilities	38,946	39,140
Total liabilities	6,624,044	6,720,746
Commitments and contingencies
Redeemable noncontrolling interest	32,698	32,239
Equity/Capital:
Common stock; $0.0001 par value, 670,000,000 shares authorized; 65,081,032 and 64,999,015 shares issued and outstanding, respectively	7	6
Additional paid-in capital	6,875,508	6,876,326
Distributions in excess of accumulated earnings	(917,315)	(861,193)
Limited Partners:
Accumulated other comprehensive loss, net	(8,968)	(14,729)
Total stockholders' equity	5,949,232	6,000,410
Noncontrolling interest	182,667	182,782
Total equity	6,131,899	6,183,192
Total liabilities and equity/capital	12,788,641	12,936,177
Essex Portfolio, L.P.
Rental properties:
Land and land improvements	2,997,904	2,929,009
Buildings and improvements	12,414,770	12,132,736
Total rental properties	15,412,674	15,061,745
Less: accumulated depreciation	(4,509,243)	(4,133,959)
Net real estate	10,903,431	10,927,786
Real estate under development	212,426	386,047
Co-investments	1,081,861	1,018,010
Real estate held for sale	0	57,938
Total real estate	12,197,718	12,389,781
Cash and cash equivalents-unrestricted	49,910	73,629
Cash and cash equivalents-restricted	11,042	10,412
Marketable securities, net of allowance for credit losses of zero as of both September 30, 2021 and December 31, 2020	183,140	147,768
Notes and other receivables, net of allowance for credit losses of $0.7 million and $0.8 million as of September 30, 2021 and December 31, 2020, respectively (includes related party receivables of $33.9 million and $4.7 million as of September 30, 2021 and December 31, 2020, respectively)	213,985	195,104
Operating lease right-of-use assets	69,756	72,143
Prepaid expenses and other assets	63,090	47,340
Total assets	12,788,641	12,936,177
LIABILITIES AND EQUITY/CAPITAL
Unsecured debt, net	5,405,520	5,607,985
Mortgage notes payable, net	640,118	643,550
Lines of credit	42,662	0
Accounts payable and accrued liabilities	220,428	152,855
Construction payable	32,777	31,417
Dividends payable	143,036	141,917
Distributions in excess of investments in co-investments	29,037	0
Operating lease liabilities	71,520	74,037
Liabilities associated with real estate held for sale	0	29,845
Other liabilities	38,946	39,140
Total liabilities	6,624,044	6,720,746
Commitments and contingencies
Redeemable noncontrolling interest	32,698	32,239
General Partner:
Common equity (65,081,032 and 64,999,015 units issued and outstanding, respectively)	5,958,200	6,015,139
Limited Partners:
Common equity (2,282,464 and 2,294,760 units issued and outstanding, respectively)	56,385	58,184
Accumulated other comprehensive loss, net	(5,340)	(11,303)
Total partners' capital	6,009,245	6,062,020
Noncontrolling interest	122,654	121,172
Total capital	6,131,899	6,183,192
Total liabilities and equity/capital	$ 12,788,641	$ 12,936,177