Equity Residential (EQR) 10-K 17 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Feb. 11, 2022	Jun. 30, 2021
Document Information [Line Items]
Entity Registrant Name	EQUITY RESIDENTIAL
Entity Central Index Key	0000906107
Document Type	10-K
Document Period End Date	Dec. 31, 2021
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Trading Symbol	EQR
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float			$ 28.5
Entity Common Stock, Shares Outstanding		375,917,242
Entity File Number	1-12252
Entity Tax Identification Number	13-3675988
Entity Address, Address Line One	Two North Riverside Plaza
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	474-1300
Entity Incorporation, State or Country Code	MD
Title of 12(b) Security	Common Shares of Beneficial Interest,$0.01 Par Value (Equity Residential)
Security Exchange Name	NYSE
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true
Auditor Name	Ernst and Young LLP
Auditor Location	Chicago, Illinois, USA
Auditor Firm ID	42
Documents Incorporated by Reference	Part III incorporates by reference certain information that will be contained in Equity Residential’s Proxy Statement relating to its 2022 Annual Meeting of Shareholders, which Equity Residential intends to file no later than 120 days after the end of its fiscal year ended December 31, 2021, and thus these items have been omitted in accordance with General Instruction G(3) to Form 10-K.  Equity Residential is the general partner and 96.7% owner of ERP Operating Limited Partnership.
ERPOP [Member]
Document Information [Line Items]
Entity Registrant Name	ERP OPERATING LIMITED PARTNERSHIP
Entity Central Index Key	0000931182
Document Type	10-K
Document Period End Date	Dec. 31, 2021
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
No Trading Symbol Flag	true
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	0-24920
Entity Tax Identification Number	36-3894853
Entity Address, Address Line One	Two North Riverside Plaza
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60606
City Area Code	312
Local Phone Number	474-1300
Entity Incorporation, State or Country Code	IL
Title of 12(b) Security	7.57% Notes due August 15, 2026(ERP Operating Limited Partnership)
Security Exchange Name	NYSE
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true
Auditor Name	Ernst and Young LLP
Auditor Location	Chicago, Illinois, USA
Auditor Firm ID	42

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Land	$ 5,814,790	$ 5,785,367
Depreciable property	22,370,811	20,920,654
Projects under development	24,307	411,134
Land held for development	62,998	86,170
Investment in real estate	28,272,906	27,203,325
Accumulated depreciation	(8,354,282)	(7,859,657)
Investment in real estate, net	19,918,624	19,343,668
Investments in unconsolidated entities	127,448	52,782
Cash and cash equivalents	123,832	42,591
Restricted deposits	236,404	57,137
Right-of-use assets	474,713	499,287
Other assets	288,220	291,426
Total assets	21,169,241	20,286,891
Liabilities:
Mortgage notes payable, net	2,191,201	2,293,890
Notes, net	5,835,222	5,335,536
Line of credit and commercial paper	315,030	414,830
Accounts payable and accrued expenses	107,013	107,366
Accrued interest payable	69,510	65,896
Lease liabilities	312,335	329,130
Other liabilities	353,102	345,064
Security deposits	66,141	60,480
Distributions payable	233,502	232,262
Total liabilities	9,483,056	9,184,454
Commitments and contingencies
Redeemable Noncontrolling Interests – Operating Partnership	498,977	338,951
Shareholders' equity:
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized; 745,600 shares issued and outstanding as of December 31, 2021 and December 31, 2020	37,280	37,280
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 375,527,195 shares issued and outstanding as of December 31, 2021 and 372,302,000 shares issued and outstanding as of December 31, 2020	3,755	3,723
Paid in capital	9,121,122	9,128,599
Retained earnings	1,827,063	1,399,715
Accumulated other comprehensive income (loss)	(34,272)	(43,666)
Total shareholders’ equity	10,954,948	10,525,651
Noncontrolling Interests:
Operating Partnership	214,094	233,162
Partially Owned Properties	18,166	4,673
Total Noncontrolling Interests	232,260	237,835
Total equity	11,187,208	10,763,486
Total liabilities and equity/capital	$ 21,169,241	$ 20,286,891

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Shares Issued	745,600	745,600
Preferred Stock, Shares Outstanding	745,600	745,600
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	375,527,195	372,302,000
Common Stock, Shares, Outstanding	375,527,195	372,302,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUES
Rental income	$ 2,463,997	$ 2,571,705	$ 2,700,691
EXPENSES
Property and maintenance	453,532	440,998	446,845
Real estate taxes and insurance	397,105	381,562	366,139
Property management	98,155	93,825	95,344
General and administrative	56,506	48,305	52,757
Depreciation	838,272	820,832	831,083
Total expenses	1,843,570	1,785,522	1,792,168
Net gain (loss) on sales of real estate properties	1,072,183	531,807	447,637
Impairment	(16,769)
Operating income	1,675,841	1,317,990	1,356,160
Interest and other income	25,666	5,935	3,201
Other expenses	(19,275)	(17,510)	(18,177)
Interest:
Expense incurred, net	(272,473)	(365,073)	(390,076)
Amortization of deferred financing costs	(8,737)	(8,939)	(11,670)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	1,401,022	932,403	939,438
Income and other tax (expense) benefit	(915)	(852)	2,281
Income (loss) from investments in unconsolidated entities	(3,398)	(3,284)	65,945
Net gain (loss) on sales of land parcels	5	34,234	2,044
Net income	1,396,714	962,501	1,009,708
Net (income) loss attributable to Noncontrolling Interests:
Operating Partnership	(45,900)	(34,010)	(36,034)
Partially Owned Properties	(17,964)	(14,855)	(3,297)
Net income attributable to controlling interests	1,332,850	913,636	970,377
Preferred distributions	(3,090)	(3,090)	(3,090)
Net income available to Common Shares	$ 1,329,760	$ 910,546	$ 967,287
Earnings per share – basic:
Net income available to Common Shares	$ 3.56	$ 2.45	$ 2.61
Weighted average Common Shares outstanding	373,833	371,791	370,461
Earnings per share – diluted:
Net income available to Common Shares	$ 3.54	$ 2.45	$ 2.60
Weighted average Common Shares outstanding	388,089	385,874	386,333

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Comprehensive income:
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the year		(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	9,394	35,087	21,188
Other comprehensive income (loss)	9,394	33,897	(12,577)
Comprehensive income	1,406,108	996,398	997,131
Comprehensive (income) attributable to Noncontrolling Interests	(64,183)	(50,084)	(38,872)
Comprehensive income attributable to controlling interests	$ 1,341,925	$ 946,314	$ 958,259

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	838,272	820,832	831,083
Amortization of deferred financing costs	8,737	8,939	11,670
Amortization of above/below market lease intangibles	(154)	(71)	(71)
Amortization of discounts and premiums on debt	5,302	5,231	11,780
Amortization of deferred settlements on derivative instruments	9,382	35,075	21,176
Amortization of right-of-use assets	13,266	11,682	11,764
Impairment	16,769
Write-off of pursuit costs	6,526	6,869	5,529
(Income) loss from investments in unconsolidated entities	3,398	3,284	(65,945)
Distributions from unconsolidated entities – return on capital	56	100	2,621
Net (gain) loss on sales of real estate properties	(1,072,183)	(531,807)	(447,637)
Net (gain) loss on sales of land parcels	(5)	(34,234)	(2,044)
Net (gain) loss on debt extinguishment		26,150	13,647
Realized/unrealized (gain) loss on derivative instruments		50
Realized (gain) loss on sale of investment securities	(23,432)
Compensation paid with Company Common Shares	27,810	23,174	24,449
Other operating activities, net		1,805	(287)
Changes in assets and liabilities:
(Increase) decrease in other assets	5,906	(53,021)	6,278
Increase (decrease) in accounts payable and accrued expenses	15,381	470	5,116
Increase (decrease) in accrued interest payable	3,614	(956)	4,230
Increase (decrease) in lease liabilities	(5,122)	(2,204)	(2,269)
Increase (decrease) in other liabilities	4,286	(8,751)	13,382
Increase (decrease) in security deposits	5,661	(9,582)	2,804
Net cash provided by operating activities	1,260,184	1,265,536	1,456,984
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(1,712,131)	(48,898)	(1,518,878)
Investment in real estate – development/other	(206,421)	(230,332)	(195,692)
Capital expenditures to real estate	(151,019)	(135,979)	(178,423)
Non-real estate capital additions	(1,696)	(20,100)	(4,955)
Interest capitalized for real estate and unconsolidated entities under development	(15,932)	(10,165)	(6,884)
Proceeds from disposition of real estate, net	1,707,747	1,113,972	1,064,619
Investments in unconsolidated entities – acquisitions	(48,534)
Investments in unconsolidated entities – other	(31,257)	(5,775)	(9,604)
Distributions from unconsolidated entities – return of capital	1,516	1,636	78,262
Purchase of investment securities and other investments	(168,291)	(773)	(269)
Proceeds from sale of investment securities	191,398
Net cash provided by (used for) investing activities	(434,620)	663,586	(771,824)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,446)	(2,923)	(19,812)
Mortgage notes payable, net:
Proceeds	58,428	519,204	295,771
Lump sum payoffs	(156,815)	(160,522)	(743,021)
Scheduled principal repayments	(7,465)	(7,759)	(6,808)
Notes, net:
Proceeds	497,470		1,194,468
Lump sum payoffs		(750,000)	(1,050,000)
Line of credit and commercial paper:
Line of credit proceeds	10,000	1,870,000	6,010,000
Line of credit repayments	(10,000)	(1,890,000)	(5,990,000)
Commercial paper proceeds	7,590,200	7,450,997	15,944,800
Commercial paper repayments	(7,690,000)	(8,034,000)	(15,446,150)
Proceeds from (payments on) settlement of derivative instruments		(1,240)	(41,616)
Prepaid finance ground lease			(34,734)
Finance ground lease principal payments	(365)
Proceeds from Employee Share Purchase Plan (ESPP)	4,265	4,508	3,116
Proceeds from exercise of options	85,445	12,275	77,785
Payment of offering costs	(428)		(991)
Other financing activities, net	(63)	(63)	(80)
Contributions – Noncontrolling Interests – Partially Owned Properties	1,394	417	7,337
Contributions – Noncontrolling Interests – Operating Partnership		13	2
Distributions:
Common Shares	(900,468)	(883,938)	(831,111)
Preferred Shares	(3,090)	(3,090)	(3,090)
Noncontrolling Interests – Operating Partnership	(31,316)	(32,403)	(29,615)
Noncontrolling Interests – Partially Owned Properties	(5,802)	(11,719)	(7,078)
Net cash provided by (used for) financing activities	(565,056)	(1,946,393)	(684,474)
Net increase (decrease) in cash and cash equivalents and restricted deposits	260,508	(17,271)	686
Cash and cash equivalents and restricted deposits, beginning of year	99,728	116,999	116,313
Cash and cash equivalents and restricted deposits, end of year	360,236	99,728	116,999
Cash and cash equivalents	123,832	42,591	45,753
Restricted deposits	236,404	57,137	71,246
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	252,838	320,854	342,048
Net cash paid (received) for income and other taxes	1,179	(1,038)	(585)
Amortization of deferred financing costs:
Investment in real estate, net	(353)	(240)	(120)
Other assets	2,338	2,338	2,987
Mortgage notes payable, net	2,743	1,815	3,934
Notes, net	4,009	5,026	4,869
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	2,764	2,234	8,618
Notes, net	2,538	2,997	3,162
Amortization of deferred settlements on derivative instruments:
Other liabilities	(12)	(12)	(12)
Accumulated other comprehensive income	9,394	35,087	21,188
Write-off of pursuit costs:
Investment in real estate, net	5,918	6,566	5,451
Other assets	582	271	62
Accounts payable and accrued expenses	26	32	16
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	2,122	1,995	(67,268)
Other liabilities	1,276	1,289	1,323
Realized/unrealized (gain) loss on derivative instruments:
Other assets			2,002
Notes, net			2,277
Other liabilities		1,240	29,486
Accumulated other comprehensive income		(1,190)	(33,765)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(15,318)	(10,165)	(6,884)
Investments in unconsolidated entities	(614)
Investments in unconsolidated entities – other:
Investment in real estate, net	1,395
Investments in unconsolidated entities	(30,642)	(4,275)	(7,504)
Other liabilities	(2,010)	(1,500)	(2,100)
Debt financing costs:
Other assets	229	(231)	(6,909)
Mortgage notes payable, net	(2,344)	(2,692)	(2,354)
Notes, net	(4,331)		(10,549)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	11,308		(489,517)
Other assets			184,116
Lease liabilities	(11,308)		333,603
Other liabilities			(28,202)
Non-cash share distribution from unconsolidated entities:
Investments in unconsolidated entities	1,430
Other assets	$ (1,430)
Mortgage Notes Payable, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		(327)	(3,381)
Notes, net:
Net gain (loss) on debt extinguishment		(327)	(3,381)
Notes, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		(25,823)	(10,266)
Notes, net:
Net gain (loss) on debt extinguishment		$ (25,823)	$ (10,266)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	PREFERRED SHARES	COMMON SHARES, $0.01 PAR VALUE	PAID IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	DISTRIBUTIONS	OPERATING PARTNERSHIP	PARTIALLY OWNED PROPERTIES
Balance, beginning of year at Dec. 31, 2018		$ 37,280	$ 3,694	$ 8,935,453	$ 1,261,763	$ (64,986)
Balance, beginning of year at Dec. 31, 2018								$ 228,738	$ (2,293)
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			3	10,407
Exercise of share options			17	77,768
Employee Share Purchase Plan (ESPP)			1	3,115
Share-based employee compensation expense:
Issuance of restricted units/shares			2	12,436				2
Share options				2,675
ESPP discount				642
Offering costs				(991)
Supplemental Executive Retirement Plan (SERP)				(1,675)
Change in market value of Redeemable Noncontrolling Interests –Operating Partnership	$ 82,283			(82,283)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				8,030				(8,030)
PAID IN CAPITAL
Conversion of OP Units into Common Shares			3	10,407
Exercise of share options			17	77,768
Employee Share Purchase Plan (ESPP)			1	3,115
RETAINED EARNINGS
Net income attributable to controlling interests	970,377				970,377
Common Share distributions					(842,555)
Preferred Share distributions					(3,090)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the year	(33,765)					(33,765)
Losses reclassified into earnings from other comprehensive income	(21,188)					21,188
DISTRIBUTIONS
Distributions declared per Common Share outstanding							$ 2.27
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			2	12,436				2
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(10,410)
Equity compensation associated with Noncontrolling Interests								13,410
Net income attributable to Noncontrolling Interests	36,034							36,034	3,297
Distributions to Noncontrolling Interests								(29,896)	(7,158)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	2,011							(2,011)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				8,030				(8,030)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	36,034							36,034	3,297
Contributions by Noncontrolling Interests									7,337
Distributions to Noncontrolling Interests								(29,896)	(7,158)
Balance, end of year at Dec. 31, 2019		37,280	3,717	8,965,577	1,386,495	(77,563)
Balance, end of year at Dec. 31, 2019								227,837	1,183
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			1	4,695
Exercise of share options			2	12,273
Employee Share Purchase Plan (ESPP)			1	4,507
Share-based employee compensation expense:
Issuance of restricted units/shares			2	11,223				13
Share options				2,349
ESPP discount				944
Supplemental Executive Retirement Plan (SERP)				(395)
Change in market value of Redeemable Noncontrolling Interests –Operating Partnership	(125,224)			125,224
Adjustment for Noncontrolling Interests ownership in Operating Partnership				2,202				(2,202)
PAID IN CAPITAL
Conversion of OP Units into Common Shares			1	4,695
Exercise of share options			2	12,273
Employee Share Purchase Plan (ESPP)			1	4,507
RETAINED EARNINGS
Net income attributable to controlling interests	913,636				913,636
Common Share distributions					(897,326)
Preferred Share distributions					(3,090)
Accumulated other comprehensive income (loss) - derivative instruments:
Unrealized holding gains (losses) arising during the year	(1,190)					(1,190)
Losses reclassified into earnings from other comprehensive income	(35,087)					35,087
DISTRIBUTIONS
Distributions declared per Common Share outstanding							2.41
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			2	11,223				13
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(4,696)
Equity compensation associated with Noncontrolling Interests								11,926
Net income attributable to Noncontrolling Interests	34,010							34,010	14,855
Distributions to Noncontrolling Interests								(32,951)	(11,782)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	775							(775)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				2,202				(2,202)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	34,010							34,010	14,855
Contributions by Noncontrolling Interests									417
Distributions to Noncontrolling Interests								(32,951)	(11,782)
Balance, end of year at Dec. 31, 2020	10,525,651	37,280	3,723	9,128,599	1,399,715	(43,666)
Balance, end of year at Dec. 31, 2020	237,835							233,162	4,673
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares			13	74,050
Exercise of share options			17	85,428
Employee Share Purchase Plan (ESPP)			1	4,264
Share-based employee compensation expense:
Issuance of restricted units/shares			1	8,388
Share options				3,101
ESPP discount				991
Offering costs				(428)
Supplemental Executive Retirement Plan (SERP)				(1,335)
Change in market value of Redeemable Noncontrolling Interests –Operating Partnership	158,598			(158,598)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				(23,338)				23,338
PAID IN CAPITAL
Conversion of OP Units into Common Shares			13	74,050
Exercise of share options			17	85,428
Employee Share Purchase Plan (ESPP)			1	4,264
RETAINED EARNINGS
Net income attributable to controlling interests	1,332,850				1,332,850
Common Share distributions					(902,412)
Preferred Share distributions					(3,090)
Accumulated other comprehensive income (loss) - derivative instruments:
Losses reclassified into earnings from other comprehensive income	(9,394)					9,394
DISTRIBUTIONS
Distributions declared per Common Share outstanding							$ 2.41
NONCONTROLLING INTERESTS
Issuance of restricted units/shares			1	8,388
Conversion of OP Units held by Noncontrolling Interests into OP Units held by General Partner								(74,063)
Equity compensation associated with Noncontrolling Interests								17,797
Net income attributable to Noncontrolling Interests	45,900							45,900	17,964
Distributions to Noncontrolling Interests								(30,612)	(5,865)
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	1,428							(1,428)
Adjustment for Noncontrolling Interests ownership in Operating Partnership				(23,338)				23,338
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	45,900							45,900	17,964
Contributions by Noncontrolling Interests									1,394
Distributions to Noncontrolling Interests								(30,612)	(5,865)
Balance, end of year at Dec. 31, 2021	10,954,948	$ 37,280	$ 3,755	$ 9,121,122	$ 1,827,063	$ (34,272)
Balance, end of year at Dec. 31, 2021	$ 232,260							$ 214,094	$ 18,166

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Stockholders Equity [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01

CONSOLIDATED BALANCE SHEETS OF

CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Land	$ 5,814,790	$ 5,785,367
Depreciable property	22,370,811	20,920,654
Projects under development	24,307	411,134
Land held for development	62,998	86,170
Investment in real estate	28,272,906	27,203,325
Accumulated depreciation	(8,354,282)	(7,859,657)
Investment in real estate, net	19,918,624	19,343,668
Investments in unconsolidated entities	127,448	52,782
Cash and cash equivalents	123,832	42,591
Restricted deposits	236,404	57,137
Right-of-use assets	474,713	499,287
Other assets	288,220	291,426
Total assets	21,169,241	20,286,891
Liabilities:
Mortgage notes payable, net	2,191,201	2,293,890
Notes, net	5,835,222	5,335,536
Line of credit and commercial paper	315,030	414,830
Accounts payable and accrued expenses	107,013	107,366
Accrued interest payable	69,510	65,896
Lease liabilities	312,335	329,130
Other liabilities	353,102	345,064
Security deposits	66,141	60,480
Distributions payable	233,502	232,262
Total liabilities	9,483,056	9,184,454
Commitments and contingencies
Redeemable Limited Partners	498,977	338,951
Partners’ Capital:
Accumulated other comprehensive income (loss)	(34,272)	(43,666)
Noncontrolling Interests – Partially Owned Properties	18,166	4,673
Total liabilities and equity/capital	21,169,241	20,286,891
ERPOP [Member]
ASSETS
Land	5,814,790	5,785,367
Depreciable property	22,370,811	20,920,654
Projects under development	24,307	411,134
Land held for development	62,998	86,170
Investment in real estate	28,272,906	27,203,325
Accumulated depreciation	(8,354,282)	(7,859,657)
Investment in real estate, net	19,918,624	19,343,668
Investments in unconsolidated entities	127,448	52,782
Cash and cash equivalents	123,832	42,591
Restricted deposits	236,404	57,137
Right-of-use assets	474,713	499,287
Other assets	288,220	291,426
Total assets	21,169,241	20,286,891
Liabilities:
Mortgage notes payable, net	2,191,201	2,293,890
Notes, net	5,835,222	5,335,536
Line of credit and commercial paper	315,030	414,830
Accounts payable and accrued expenses	107,013	107,366
Accrued interest payable	69,510	65,896
Lease liabilities	312,335	329,130
Other liabilities	353,102	345,064
Security deposits	66,141	60,480
Distributions payable	233,502	232,262
Total liabilities	9,483,056	9,184,454
Commitments and contingencies
Redeemable Limited Partners	498,977	338,951
Partners’ Capital:
Preference Units	37,280	37,280
General Partner	10,951,940	10,532,037
Limited Partners	214,094	233,162
Accumulated other comprehensive income (loss)	(34,272)	(43,666)
Total partners’ capital	11,169,042	10,758,813
Noncontrolling Interests – Partially Owned Properties	18,166	4,673
Total capital	11,187,208	10,763,486
Total liabilities and equity/capital	$ 21,169,241	$ 20,286,891

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
REVENUES
Rental income	$ 2,463,997	$ 2,571,705	$ 2,700,691
EXPENSES
Property and maintenance	453,532	440,998	446,845
Real estate taxes and insurance	397,105	381,562	366,139
Property management	98,155	93,825	95,344
General and administrative	56,506	48,305	52,757
Depreciation	838,272	820,832	831,083
Total expenses	1,843,570	1,785,522	1,792,168
Net gain (loss) on sales of real estate properties	1,072,183	531,807	447,637
Impairment	(16,769)
Operating income	1,675,841	1,317,990	1,356,160
Interest and other income	25,666	5,935	3,201
Other expenses	(19,275)	(17,510)	(18,177)
Interest:
Expense incurred, net	(272,473)	(365,073)	(390,076)
Amortization of deferred financing costs	(8,737)	(8,939)	(11,670)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	1,401,022	932,403	939,438
Income and other tax (expense) benefit	(915)	(852)	2,281
Income (loss) from investments in unconsolidated entities	(3,398)	(3,284)	65,945
Net gain (loss) on sales of land parcels	5	34,234	2,044
Net income	1,396,714	962,501	1,009,708
Partially Owned Properties	(17,964)	(14,855)	(3,297)
Net income attributable to controlling interests	$ 1,332,850	$ 913,636	$ 970,377
Earnings per Unit – basic:
Net income available to Units	$ 3.56	$ 2.45	$ 2.61
Earnings per Unit – diluted:
Net income available to Units	$ 3.54	$ 2.45	$ 2.60
Weighted average Units outstanding	388,089	385,874	386,333
ERPOP [Member]
REVENUES
Rental income	$ 2,463,997	$ 2,571,705	$ 2,700,691
EXPENSES
Property and maintenance	453,532	440,998	446,845
Real estate taxes and insurance	397,105	381,562	366,139
Property management	98,155	93,825	95,344
General and administrative	56,506	48,305	52,757
Depreciation	838,272	820,832	831,083
Total expenses	1,843,570	1,785,522	1,792,168
Net gain (loss) on sales of real estate properties	1,072,183	531,807	447,637
Impairment	(16,769)
Operating income	1,675,841	1,317,990	1,356,160
Interest and other income	25,666	5,935	3,201
Other expenses	(19,275)	(17,510)	(18,177)
Interest:
Expense incurred, net	(272,473)	(365,073)	(390,076)
Amortization of deferred financing costs	(8,737)	(8,939)	(11,670)
Income before income and other taxes, income (loss) from investments in unconsolidated entities and net gain (loss) on sales of land parcels	1,401,022	932,403	939,438
Income and other tax (expense) benefit	(915)	(852)	2,281
Income (loss) from investments in unconsolidated entities	(3,398)	(3,284)	65,945
Net gain (loss) on sales of land parcels	5	34,234	2,044
Net income	1,396,714	962,501	1,009,708
Partially Owned Properties	(17,964)	(14,855)	(3,297)
Net income attributable to controlling interests	1,378,750	947,646	1,006,411
ALLOCATION OF NET INCOME:
Preference Units	3,090	3,090	3,090
General Partner	1,329,760	910,546	967,287
Limited Partners	45,900	34,010	36,034
Net income available to Units	$ 1,375,660	$ 944,556	$ 1,003,321
Earnings per Unit – basic:
Net income available to Units	$ 3.56	$ 2.45	$ 2.61
Weighted average Units outstanding	386,096	384,794	383,368
Earnings per Unit – diluted:
Net income available to Units	$ 3.54	$ 2.45	$ 2.60
Weighted average Units outstanding	388,089	385,874	386,333

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Comprehensive income:
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the year		(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	9,394	35,087	21,188
Other comprehensive income (loss)	9,394	33,897	(12,577)
Comprehensive income	1,406,108	996,398	997,131
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(64,183)	(50,084)	(38,872)
Comprehensive income attributable to controlling interests	1,341,925	946,314	958,259
ERPOP [Member]
Comprehensive income:
Net income	1,396,714	962,501	1,009,708
Other comprehensive income (loss) – derivative instruments:
Unrealized holding gains (losses) arising during the year		(1,190)	(33,765)
Losses reclassified into earnings from other comprehensive income	9,394	35,087	21,188
Other comprehensive income (loss)	9,394	33,897	(12,577)
Comprehensive income	1,406,108	996,398	997,131
Comprehensive (income) attributable to Noncontrolling Interests – Partially Owned Properties	(17,964)	(14,855)	(3,297)
Comprehensive income attributable to controlling interests	$ 1,388,144	$ 981,543	$ 993,834

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	838,272	820,832	831,083
Amortization of deferred financing costs	8,737	8,939	11,670
Amortization of above/below market lease intangibles	(154)	(71)	(71)
Amortization of discounts and premiums on debt	5,302	5,231	11,780
Amortization of deferred settlements on derivative instruments	9,382	35,075	21,176
Amortization of right-of-use assets	13,266	11,682	11,764
Impairment	16,769
Write-off of pursuit costs	6,526	6,869	5,529
(Income) loss from investments in unconsolidated entities	3,398	3,284	(65,945)
Distributions from unconsolidated entities – return on capital	56	100	2,621
Net (gain) loss on sales of real estate properties	(1,072,183)	(531,807)	(447,637)
Net (gain) loss on sales of land parcels	(5)	(34,234)	(2,044)
Net (gain) loss on debt extinguishment		26,150	13,647
Realized/unrealized (gain) loss on derivative instruments		50
Realized (gain) loss on sale of investment securities	(23,432)
Compensation paid with Company Common Shares	27,810	23,174	24,449
Other operating activities, net		1,805	(287)
Changes in assets and liabilities:
(Increase) decrease in other assets	5,906	(53,021)	6,278
Increase (decrease) in accounts payable and accrued expenses	15,381	470	5,116
Increase (decrease) in accrued interest payable	3,614	(956)	4,230
Increase (decrease) in lease liabilities	(5,122)	(2,204)	(2,269)
Increase (decrease) in other liabilities	4,286	(8,751)	13,382
Increase (decrease) in security deposits	5,661	(9,582)	2,804
Net cash provided by operating activities	1,260,184	1,265,536	1,456,984
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(1,712,131)	(48,898)	(1,518,878)
Investment in real estate – development/other	(206,421)	(230,332)	(195,692)
Capital expenditures to real estate	(151,019)	(135,979)	(178,423)
Non-real estate capital additions	(1,696)	(20,100)	(4,955)
Interest capitalized for real estate and unconsolidated entities under development	(15,932)	(10,165)	(6,884)
Proceeds from disposition of real estate, net	1,707,747	1,113,972	1,064,619
Investments in unconsolidated entities – acquisitions	(48,534)
Investments in unconsolidated entities – other	(31,257)	(5,775)	(9,604)
Distributions from unconsolidated entities – return of capital	1,516	1,636	78,262
Purchase of investment securities and other investments	(168,291)	(773)	(269)
Proceeds from sale of investment securities	191,398
Net cash provided by (used for) investing activities	(434,620)	663,586	(771,824)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,446)	(2,923)	(19,812)
Mortgage notes payable, net:
Proceeds	58,428	519,204	295,771
Lump sum payoffs	(156,815)	(160,522)	(743,021)
Scheduled principal repayments	(7,465)	(7,759)	(6,808)
Notes, net:
Proceeds	497,470		1,194,468
Lump sum payoffs		(750,000)	(1,050,000)
Line of credit and commercial paper:
Line of credit proceeds	10,000	1,870,000	6,010,000
Line of credit repayments	(10,000)	(1,890,000)	(5,990,000)
Commercial paper proceeds	7,590,200	7,450,997	15,944,800
Commercial paper repayments	(7,690,000)	(8,034,000)	(15,446,150)
Proceeds from (payments on) settlement of derivative instruments		(1,240)	(41,616)
Prepaid finance ground lease			(34,734)
Finance ground lease principal payments	(365)
Proceeds from Employee Share Purchase Plan (ESPP)	4,265	4,508	3,116
Proceeds from exercise of EQR options	85,445	12,275	77,785
Payment of offering costs	(428)		(991)
Other financing activities, net	(63)	(63)	(80)
Contributions – Noncontrolling Interests – Partially Owned Properties	1,394	417	7,337
Contributions – Limited Partners		13	2
Distributions:
OP Units – General Partner	(900,468)	(883,938)	(831,111)
Preference Units	(3,090)	(3,090)	(3,090)
OP Units – Limited Partners	(31,316)	(32,403)	(29,615)
Noncontrolling Interests – Partially Owned Properties	(5,802)	(11,719)	(7,078)
Net cash provided by (used for) financing activities	(565,056)	(1,946,393)	(684,474)
Net increase (decrease) in cash and cash equivalents and restricted deposits	260,508	(17,271)	686
Cash and cash equivalents and restricted deposits, beginning of year	99,728	116,999	116,313
Cash and cash equivalents and restricted deposits, end of year	360,236	99,728	116,999
Cash and cash equivalents	123,832	42,591	45,753
Restricted deposits	236,404	57,137	71,246
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	252,838	320,854	342,048
Net cash paid (received) for income and other taxes	1,179	(1,038)	(585)
Amortization of deferred financing costs:
Investment in real estate, net	(353)	(240)	(120)
Other assets	2,338	2,338	2,987
Mortgage notes payable, net	2,743	1,815	3,934
Notes, net	4,009	5,026	4,869
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	2,764	2,234	8,618
Notes, net	2,538	2,997	3,162
Amortization of deferred settlements on derivative instruments:
Other liabilities	(12)	(12)	(12)
Accumulated other comprehensive income	9,394	35,087	21,188
Write-off of pursuit costs:
Investment in real estate, net	5,918	6,566	5,451
Other assets	582	271	62
Accounts payable and accrued expenses	26	32	16
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	2,122	1,995	(67,268)
Other liabilities	1,276	1,289	1,323
Realized/unrealized (gain) loss on derivative instruments:
Other assets			2,002
Notes, net			2,277
Other liabilities		1,240	29,486
Accumulated other comprehensive income		(1,190)	(33,765)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	15,318	10,165	6,884
Investments in unconsolidated entities	(614)
Investments in unconsolidated entities – other:
Investment in real estate, net	1,395
Investments in unconsolidated entities	(30,642)	(4,275)	(7,504)
Other liabilities	(2,010)	(1,500)	(2,100)
Debt financing costs:
Other assets	229	(231)	(6,909)
Mortgage notes payable, net	(2,344)	(2,692)	(2,354)
Notes, net	(4,331)		(10,549)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	11,308		(489,517)
Other assets			184,116
Lease liabilities	(11,308)		333,603
Other liabilities			(28,202)
Non-cash share distribution from unconsolidated entities:
Investments in unconsolidated entities	1,430
Other assets	(1,430)
Mortgage Notes Payable, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		(327)	(3,381)
Notes, net:
Net gain (loss) on debt extinguishment		(327)	(3,381)
Notes, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		(25,823)	(10,266)
Notes, net:
Net gain (loss) on debt extinguishment		(25,823)	(10,266)
ERPOP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	1,396,714	962,501	1,009,708
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	838,272	820,832	831,083
Amortization of deferred financing costs	8,737	8,939	11,670
Amortization of above/below market lease intangibles	(154)	(71)	(71)
Amortization of discounts and premiums on debt	5,302	5,231	11,780
Amortization of deferred settlements on derivative instruments	9,382	35,075	21,176
Amortization of right-of-use assets	13,266	11,682	11,764
Impairment	16,769
Write-off of pursuit costs	6,526	6,869	5,529
(Income) loss from investments in unconsolidated entities	3,398	3,284	(65,945)
Distributions from unconsolidated entities – return on capital	56	100	2,621
Net (gain) loss on sales of real estate properties	(1,072,183)	(531,807)	(447,637)
Net (gain) loss on sales of land parcels	(5)	(34,234)	(2,044)
Net (gain) loss on debt extinguishment		26,150	13,647
Realized/unrealized (gain) loss on derivative instruments		50
Realized (gain) loss on sale of investment securities	(23,432)
Compensation paid with Company Common Shares	27,810	23,174	24,449
Other operating activities, net		1,805	(287)
Changes in assets and liabilities:
(Increase) decrease in other assets	5,906	(53,021)	6,278
Increase (decrease) in accounts payable and accrued expenses	15,381	470	5,116
Increase (decrease) in accrued interest payable	3,614	(956)	4,230
Increase (decrease) in lease liabilities	(5,122)	(2,204)	(2,269)
Increase (decrease) in other liabilities	4,286	(8,751)	13,382
Increase (decrease) in security deposits	5,661	(9,582)	2,804
Net cash provided by operating activities	1,260,184	1,265,536	1,456,984
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(1,712,131)	(48,898)	(1,518,878)
Investment in real estate – development/other	(206,421)	(230,332)	(195,692)
Capital expenditures to real estate	(151,019)	(135,979)	(178,423)
Non-real estate capital additions	(1,696)	(20,100)	(4,955)
Interest capitalized for real estate and unconsolidated entities under development	(15,932)	(10,165)	(6,884)
Proceeds from disposition of real estate, net	1,707,747	1,113,972	1,064,619
Investments in unconsolidated entities – acquisitions	(48,534)
Investments in unconsolidated entities – other	(31,257)	(5,775)	(9,604)
Distributions from unconsolidated entities – return of capital	1,516	1,636	78,262
Purchase of investment securities and other investments	(168,291)	(773)	(269)
Proceeds from sale of investment securities	191,398
Net cash provided by (used for) investing activities	(434,620)	663,586	(771,824)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(6,446)	(2,923)	(19,812)
Mortgage notes payable, net:
Proceeds	58,428	519,204	295,771
Lump sum payoffs	(156,815)	(160,522)	(743,021)
Scheduled principal repayments	(7,465)	(7,759)	(6,808)
Notes, net:
Proceeds	497,470		1,194,468
Lump sum payoffs		(750,000)	(1,050,000)
Line of credit and commercial paper:
Line of credit proceeds	10,000	1,870,000	6,010,000
Line of credit repayments	(10,000)	(1,890,000)	(5,990,000)
Commercial paper proceeds	7,590,200	7,450,997	15,944,800
Commercial paper repayments	(7,690,000)	(8,034,000)	(15,446,150)
Proceeds from (payments on) settlement of derivative instruments		(1,240)	(41,616)
Prepaid finance ground lease			(34,734)
Finance ground lease principal payments	(365)
Proceeds from Employee Share Purchase Plan (ESPP)	4,265	4,508	3,116
Proceeds from exercise of EQR options	85,445	12,275	77,785
Payment of offering costs	(428)		(991)
Other financing activities, net	(63)	(63)	(80)
Contributions – Noncontrolling Interests – Partially Owned Properties	1,394	417	7,337
Contributions – Limited Partners		13	2
Distributions:
OP Units – General Partner	(900,468)	(883,938)	(831,111)
Preference Units	(3,090)	(3,090)	(3,090)
OP Units – Limited Partners	(31,316)	(32,403)	(29,615)
Noncontrolling Interests – Partially Owned Properties	(5,802)	(11,719)	(7,078)
Net cash provided by (used for) financing activities	(565,056)	(1,946,393)	(684,474)
Net increase (decrease) in cash and cash equivalents and restricted deposits	260,508	(17,271)	686
Cash and cash equivalents and restricted deposits, beginning of year	99,728	116,999	116,313
Cash and cash equivalents and restricted deposits, end of year	360,236	99,728	116,999
Cash and cash equivalents	123,832	42,591	45,753
Restricted deposits	236,404	57,137	71,246
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	252,838	320,854	342,048
Net cash paid (received) for income and other taxes	1,179	(1,038)	(585)
Amortization of deferred financing costs:
Investment in real estate, net	(353)	(240)	(120)
Other assets	2,338	2,338	2,987
Mortgage notes payable, net	2,743	1,815	3,934
Notes, net	4,009	5,026	4,869
Amortization of discounts and premiums on debt:
Mortgage notes payable, net	2,764	2,234	8,618
Notes, net	2,538	2,997	3,162
Amortization of deferred settlements on derivative instruments:
Other liabilities	(12)	(12)	(12)
Accumulated other comprehensive income	9,394	35,087	21,188
Write-off of pursuit costs:
Investment in real estate, net	5,918	6,566	5,451
Other assets	582	271	62
Accounts payable and accrued expenses	26	32	16
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	2,122	1,995	(67,268)
Other liabilities	1,276	1,289	1,323
Realized/unrealized (gain) loss on derivative instruments:
Other assets			2,002
Notes, net			2,277
Other liabilities		1,240	29,486
Accumulated other comprehensive income		(1,190)	(33,765)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(15,318)	(10,165)	(6,884)
Investments in unconsolidated entities	(614)
Investments in unconsolidated entities – other:
Investment in real estate, net	1,395
Investments in unconsolidated entities	(30,642)	(4,275)	(7,504)
Other liabilities	(2,010)	(1,500)	(2,100)
Debt financing costs:
Other assets	229	(231)	(6,909)
Mortgage notes payable, net	(2,344)	(2,692)	(2,354)
Notes, net	(4,331)		(10,549)
Right-of-use assets and lease liabilities initial measurement and reclassifications:
Right-of-use assets	11,308		(489,517)
Other assets			184,116
Lease liabilities	(11,308)		333,603
Other liabilities			(28,202)
Non-cash share distribution from unconsolidated entities:
Investments in unconsolidated entities	1,430
Other assets	$ (1,430)
ERPOP [Member] | Mortgage Notes Payable, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		(327)	(3,381)
Notes, net:
Net gain (loss) on debt extinguishment		(327)	(3,381)
ERPOP [Member] | Notes, Net [Member]
Mortgage notes payable, net:
Net gain (loss) on debt extinguishment		(25,823)	(10,266)
Notes, net:
Net gain (loss) on debt extinguishment		$ (25,823)	$ (10,266)

CONSOLIDATED STATEMENTS OF CH_3

CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	Total	ERPOP [Member]	PREFERRED SHARESERPOP [Member]	General Partner [Member]ERPOP [Member]	Limited PartnerERPOP [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)ERPOP [Member]	DISTRIBUTIONS [Member]ERPOP [Member]	PARTIALLY OWNED PROPERTIES [Member]ERPOP [Member]
Balance, beginning of year at Dec. 31, 2018			$ 37,280	$ 10,200,910	$ 228,738	$ (64,986)
Balance, beginning of year at Dec. 31, 2018								$ (2,293)
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				10,410	(10,410)
Exercise of EQR share options				77,785
EQR's Employee Share Purchase Plan (ESPP)				3,116
EQR restricted shares				12,438	2
EQR share options				2,675
EQR ESPP discount				642
Net income available to Units - General Partner		$ 967,287		967,287
OP Units - General Partner distributions				(842,555)
Offering costs				(991)
Supplemental Executive Retirement Plan (SERP)				(1,675)
Change in market value of Redeemable Limited Partners				(82,283)
Adjustment for Limited Partners ownership in Operating Partnership				8,030	(8,030)
Equity compensation associated with Units - Limited Partners					13,410
Net income available to Units - Limited Partners		36,034			36,034
Units - Limited Partners distributions					(29,896)
Change in carrying value of Redeemable Limited Partners					(2,011)
Unrealized holding gains (losses) arising during the year	$ 3,297	3,297				(33,765)
Losses reclassified into earnings from other comprehensive income	(21,188)	(21,188)				21,188
Distributions declared per Unit outstanding							$ 2.27
Net income attributable to Noncontrolling Interests	1,009,708	1,009,708						3,297
Contributions by Noncontrolling Interests								7,337
Distributions to Noncontrolling Interests								(7,158)
Balance, end of year at Dec. 31, 2019			37,280	10,355,789	227,837	(77,563)
Balance, end of year at Dec. 31, 2019								1,183
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				4,696	(4,696)
Exercise of EQR share options				12,275
EQR's Employee Share Purchase Plan (ESPP)				4,508
EQR restricted shares				11,225	13
EQR share options				2,349
EQR ESPP discount				944
Net income available to Units - General Partner		910,546		910,546
OP Units - General Partner distributions				(897,326)
Supplemental Executive Retirement Plan (SERP)				(395)
Change in market value of Redeemable Limited Partners				125,224
Adjustment for Limited Partners ownership in Operating Partnership				2,202	(2,202)
Equity compensation associated with Units - Limited Partners					11,926
Net income available to Units - Limited Partners		34,010			34,010
Units - Limited Partners distributions					(32,951)
Change in carrying value of Redeemable Limited Partners					(775)
Unrealized holding gains (losses) arising during the year	14,855	14,855				(1,190)
Losses reclassified into earnings from other comprehensive income	(35,087)	(35,087)				35,087
Distributions declared per Unit outstanding							2.41
Net income attributable to Noncontrolling Interests	962,501	962,501						14,855
Contributions by Noncontrolling Interests								417
Distributions to Noncontrolling Interests								(11,782)
Balance, end of year at Dec. 31, 2020			37,280	10,532,037	233,162	(43,666)
Balance, end of year at Dec. 31, 2020								4,673
Conversion of OP Units held by Limited Partners into OP Units held by General Partner				74,063	(74,063)
Exercise of EQR share options				85,445
EQR's Employee Share Purchase Plan (ESPP)				4,265
EQR restricted shares				8,389
EQR share options				3,101
EQR ESPP discount				991
Net income available to Units - General Partner		1,329,760		1,329,760
OP Units - General Partner distributions				(902,412)
Offering costs				(428)
Supplemental Executive Retirement Plan (SERP)				(1,335)
Change in market value of Redeemable Limited Partners				(158,598)
Adjustment for Limited Partners ownership in Operating Partnership				(23,338)	23,338
Equity compensation associated with Units - Limited Partners					17,797
Net income available to Units - Limited Partners		45,900			45,900
Units - Limited Partners distributions					(30,612)
Change in carrying value of Redeemable Limited Partners					(1,428)
Unrealized holding gains (losses) arising during the year	17,964	17,964
Losses reclassified into earnings from other comprehensive income	(9,394)	(9,394)				9,394
Distributions declared per Unit outstanding							$ 2.41
Net income attributable to Noncontrolling Interests	$ 1,396,714	$ 1,396,714						17,964
Contributions by Noncontrolling Interests								1,394
Distributions to Noncontrolling Interests								(5,865)
Balance, end of year at Dec. 31, 2021			$ 37,280	$ 10,951,940	$ 214,094	$ (34,272)
Balance, end of year at Dec. 31, 2021								$ 18,166

Business

Business	12 Months Ended
	Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business	1. Business Equity Residential (“EQR”) is an S&P 500 company focused on the acquisition, development and management of residential properties located in and around dynamic cities that attract affluent long-term renters, a business that is conducted on its behalf by ERP Operating Limited Partnership (“ERPOP”). EQR is a Maryland real estate investment trust (“REIT”) formed in March 1993 and ERPOP is an Illinois limited partnership formed in May 1993. References to the “Company,” “we,” “us” or “our” mean collectively EQR, ERPOP and those entities/subsidiaries owned or controlled by EQR and/or ERPOP. References to the “Operating Partnership” mean collectively ERPOP and those entities/subsidiaries owned or controlled by ERPOP. Unless otherwise indicated, the notes to consolidated financial statements apply to both the Company and the Operating Partnership. EQR is the general partner of, and as of December 31, 2021 owned an approximate 96.7% ownership interest in, ERPOP. All of the Company’s property ownership, development and related business operations are conducted through the Operating Partnership and EQR has no material assets or liabilities other than its investment in ERPOP. EQR issues equity from time to time, the net proceeds of which it is obligated to contribute to ERPOP, but does not have any indebtedness as all debt is incurred by the Operating Partnership. The Operating Partnership holds substantially all of the assets of the Company, including the Company’s ownership interests in its joint ventures. The Operating Partnership conducts the operations of the business and is structured as a partnership with no publicly traded equity. As of December 31, 2021, the Company, directly or indirectly through investments in title holding entities, owned all or a portion of 310 properties located in 10 states and the District of Columbia consisting of 80,407 apartment units. The ownership breakdown includes (table does not include various uncompleted development properties): Properties Apartment Units Wholly Owned Properties 294 76,861 Partially Owned Properties – Consolidated 16 3,546 310 80,407 COVID-19 Pandemic The Company continues to monitor and respond to the ongoing effects of the novel coronavirus (“COVID-19”) pandemic. Its duration, severity and the extent of its adverse health impact on the general population, our residents and employees, along with the distribution, effectiveness and acceptance of vaccines and testing and pace and degree of recovery from the pandemic are among the many unknowns that have had or could continue to have a significant impact on the Company. These, among other items, have impacted the economy, the unemployment rate and our operations and could materially affect our future consolidated results of operations, financial condition, liquidity, investments and overall performance.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Summary Of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation Due to the Company’s ability as general partner to control either through ownership or by contract the Operating Partnership and its subsidiaries, the Operating Partnership and each such subsidiary has been consolidated with the Company for financial reporting purposes, except for any unconsolidated properties/entities. Real Estate Assets and Depreciation of Investment in Real Estate The Company expects that substantially all of its acquisitions will be accounted for as asset acquisitions. In an asset acquisition, the Company is required to capitalize transaction costs and allocate the purchase price on a relative fair value basis (including any identified intangible assets). For the years ended December 31, 2021 and 2020, all acquisitions were considered asset acquisitions. In making estimates of relative fair values for purposes of allocating purchase price, the Company utilizes a number of sources, including independent appraisals that may be obtained in connection with the acquisition or financing of the respective property, our own analysis of recently acquired or developed and existing comparable properties in our portfolio and other market data. The Company also considers information obtained about each property as a result of its pre-acquisition due diligence, marketing and leasing activities in estimating the relative fair value of the tangible and intangible assets/liabilities acquired. The Company allocates the purchase price of acquired real estate to various components as follows: • Land – Based on actual purchase price adjusted to an allocation of the relative fair value (as necessary) if acquired separately or market research/comparables if acquired with an operating property. • Furniture, Fixtures and Equipment – Based on an estimate of the allocation of the relative fair value of the appliances and fixtures inside an apartment unit. The per-apartment unit amount applied depends on the economic age of the apartment units acquired. Depreciation is calculated on the straight-line method over an estimated useful life of five to ten years. • Lease Intangibles – The Company considers the value of acquired in-place leases and above/below market leases and the amortization period is the average remaining term of each respective acquired lease. In-place residential leases’ average term at acquisition approximates six months. In-place non-residential leases’ term at acquisition approximates the average remaining term of all acquired non-residential leases. • Other Intangible Assets – The Company considers whether it has acquired other intangible assets, including any customer relationship intangibles and the amortization period is the estimated useful life of the acquired intangible asset. • Building – Based on the allocation of the relative fair value determined on an “as-if vacant” basis. Depreciation is calculated on the straight-line method over an estimated useful life of thirty years. • Long-Term Debt – The Company calculates the allocation of the relative fair value by discounting the remaining contractual cash flows on each instrument at the current market rate for those borrowings. Replacements inside an apartment unit such as appliances and carpeting are depreciated over an estimated useful life of five to ten years. Expenditures for ordinary maintenance and repairs are expensed to operations as incurred and significant renovations and improvements that improve and/or extend the useful life of the asset are capitalized over their estimated useful life, generally five to fifteen years. Initial direct leasing costs are expensed as incurred as such expense approximates the deferral and amortization of initial direct leasing costs over the lease terms. Property dispositions are recorded when control transfers to unrelated third parties, contingencies have been removed and sufficient cash consideration has been received by the Company. Upon disposition, the related costs and accumulated depreciation are removed from the respective accounts. Any gain or loss on sale is recognized in accordance with accounting principles generally accepted in the United States. The Company classifies real estate assets as real estate held for sale when it is probable a property will be disposed of. The Company classifies properties under development and/or expansion and properties in the lease-up phase (including land) as construction-in-progress until construction has been completed and certificates of occupancy permits have been obtained. Impairment of Long-Lived Assets At least quarterly, the Company evaluates its long-lived assets, including its investment in real estate, for indicators of impairment. The judgments regarding the existence of impairment indicators are based on factors such as operational performance, market conditions, legal, regulatory and environmental concerns, the Company’s intent and ability to hold the related asset, as well as any significant cost overruns on development properties. Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted. If an impairment indicator exists, the Company performs the following: • For long-lived operating assets to be held and used, the Company compares the expected future undiscounted cash flows for the long-lived asset against the carrying amount of that asset. If the sum of the estimated undiscounted cash flows is less than the carrying amount of the asset, the Company would make an estimate of the fair value for the particular asset and would record an impairment loss for the difference between the estimated fair value and the carrying amount of the asset. In determining the future undiscounted cash flows or the estimated fair value of an asset there is judgment in estimating the expected future rental revenues, operating expenses and discount and capitalization rates. • For long-lived non-operating assets (projects under development and land held for development), management evaluates major cost overruns, market conditions that could affect lease-up projections, intent and ability to hold the asset, and any other indicators of impairment. If any of the indicators were to suggest impairment was present, a recoverability analysis would be performed and the carrying value of the asset would be adjusted accordingly to fair value. • For long-lived assets to be disposed of, an impairment loss is recognized when the estimated fair value of the asset, less the estimated cost to sell, is less than the carrying amount of the asset measured at the time that the Company has determined it will sell the asset. Long-lived assets held for sale and the related liabilities are separately reported, with the long-lived assets reported at the lower of their carrying amounts or their estimated fair values, less their costs to sell, and are not depreciated after reclassification to real estate held for sale. See Note 4 for further discussion of the Company’s impairment charge on a land parcel in 2021. Impairment of Investments in Unconsolidated Entities At least quarterly, the Company evaluates its investments in unconsolidated entities, including any multifamily real estate assets held by a joint venture, for indicators of other than temporary impairment, considering whether there has been a change to events or circumstances that would impact recoverability of the Company’s investment as well as any changes with regards to the Company's intent and ability to hold the investment to recover its carrying value. Cost Capitalization See the Real Estate Assets and Depreciation of Investment in Real Estate During the years ended December 31, 2021 and 2020, the Company capitalized $13.9 million and $12.1 million, respectively, of payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of development activities as well as major capital and/or renovation projects. Cash and Cash Equivalents The Company considers all demand deposits, money market accounts and investments in certificates of deposit with a maturity of three months or less at the date of purchase to be cash equivalents. The Company maintains its cash and cash equivalents at financial institutions. The combined account balances at one or more institutions typically exceed the Federal Deposit Insurance Corporation (“FDIC”) insurance coverage, and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes that the risk is not significant, as the Company does not anticipate the financial institutions’ non-performance. Fair Value of Financial Instruments The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments. The Company, where possible, bases the fair values of its financial instruments on listed market prices and third-party quotes. Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments. In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company may seek to manage these risks by following established risk management policies and procedures, including the use of derivatives to hedge interest rate risk on debt instruments. The Company may also use derivatives to manage commodity prices in the daily operations of the business. The Company has a policy of only entering into derivative contracts with major financial institutions based upon their credit ratings and other factors. When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from these instruments nor does it anticipate any material adverse effect on its net income or financial position in the future. The Company recognizes all derivatives as either assets or liabilities in the consolidated balance sheets and measures those instruments at fair value. In addition, fair value adjustments will affect either shareholders’ equity/partners’ capital or net income depending on whether the derivative instruments qualify as a hedge for accounting purposes and, if so, the nature of the hedging activity. When the terms of an underlying transaction are modified, or when the underlying transaction is terminated or completed, all changes in the fair value of the instrument are marked-to-market with changes in value included in net income each period until the instrument matures. Any derivative instrument used for risk management that does not meet the hedging criteria is marked-to-market each period. The Company does not use derivatives for trading or speculative purposes. Leases and Revenue Recognition Rental income attributable to residential leases is recorded on a straight-line basis over the term of the lease when reasonably assured they are collectible, which is not materially different than if it were recorded when due from residents and recognized monthly as it was earned. Leases entered into between a resident and a property for the rental of an apartment unit are generally year-to-year, renewable upon consent of both parties on an annual or monthly basis. Rental income attributable to non-residential leases is also recorded on a straight-line basis over the term of the lease when reasonably assured they are collectible. Non-residential leases generally have five to ten year lease terms with market-based renewal options. Fee and asset management revenue and interest income are recorded on an accrual basis. The majority of the Company’s revenue is derived from residential, non-residential and other lease income, which are accounted for under the lease standard effective January 1, 2019. Our revenue streams have the same timing and pattern of revenue recognition across our reportable segments, with consistent allocations between the lease and revenue recognition standards. The Company is a lessor for its residential and non-residential leases and is a lessee for its corporate headquarters and regional offices and ground leases for land underlying current operating properties or projects under development. If applicable, lease agreements must be evaluated to determine the accounting treatment as a finance or operating lease in accordance with the lease standard. A lease is classified as a finance lease if it meets any of the following criteria: (a) Ownership of the underlying asset is transferred to the lessee by the end of the lease term; (b) the lessee has and is reasonably certain to exercise an option to purchase the underlying asset; (c) the lease term is for the major part of the remaining economic life of the underlying asset; (d) the present value of future minimum lease payments is equal to substantially all of the fair value of the underlying asset; and (e) the underlying asset is expected to have no alternative use to the lessor at the end of the lease term due to its specialized nature. The lease standard also requires lessees to recognize on the balance sheet: (a) a liability for the lease obligation (initially measured at the present value of the future lease payments not yet paid over the lease term); and (b) an asset for its right to use the underlying asset (initially equal to the lease liability). The discount rate for the lease is the rate implicit in the lease or, if that rate cannot be readily determined, the incremental borrowing rate. As the Company does not know the amount of the lessors’ initial direct costs, it cannot readily determine the rate implicit in the lease and instead must apply the incremental borrowing rate. The Company uses estimates and judgments on the incremental borrowing rate used to calculate the present value of the future lease payments. Since the Company’s credit backs the corporate office lease obligations and the lease terms are generally ten years or less, the discount rate range was estimated by using the Company’s borrowing rates for actual pricing data. The discount rate range for ground leases takes into account various factors, including the longer life of the ground leases, and was estimated by using the Company’s borrowing rates for actual pricing data through 30 years and other long-term market rates. The Company’s revenue streams that are not accounted for under the lease standard include: • Parking revenue – The Company’s parking revenue, not related to leasing, is derived primarily from monthly and transient daily parking and is accounted for at the point in time when control of the goods or services transfers to the customer and our performance obligation is satisfied. • Other rental and non-rental related revenue – The Company receives other income, including, but not limited to: (a) ancillary income, such as laundry, renters insurance and cable income; (b) net settlement income; and (c) miscellaneous fee income. • Gains or losses on sales of real estate properties – The Company accounts for the sale of real estate properties and any related gain recognition in accordance with the accounting guidance applicable to sales of real estate, which establishes standards for recognition of profit on all real estate sales transactions. The Company recognizes the sale, and associated gain or loss from the disposition, provided that the earnings process is complete and the Company does not have significant continuing involvement. A gain or loss is recognized when the criteria for an asset to be derecognized are met, which include when a contract exists and the buyer obtained control of the nonfinancial asset that was sold. See Note 8 for the Company’s rental income detail allocated between the lease and revenue recognition standards. The Company’s allowance for doubtful accounts (which offsets accounts receivable and is included within other assets on the consolidated balance sheets) and bad debts (which reduce rental income on the consolidated statements of operations and comprehensive income) have historically been very modest, particularly in our residential business, given the quality of our resident base and asset class. However, due to the impact of the COVID-19 pandemic, the allowance for doubtful accounts and bad debts became elevated during 2020 and remained elevated in 2021. In accordance with the lease standard, if we determine the lease payments are not probable of collection (based on known troubled accounts, rent deferral plans granted, historical experience and other currently available evidence), we fully reserve for any unpaid amounts, deferred rent receivable, variable lease payments and straight-line receivable balances and recognize rental income only if cash is received. If the Company’s estimates of collectibility differ from the cash received, then the timing and amount of the Company’s reported revenue could be impacted. See Note 8 for additional details. Share-Based Compensation The Company expenses share-based compensation for employee and trustee grants of restricted shares, restricted units and share options. Any common share of beneficial interest, $0.01 par value per share (the “Common Shares”), issued pursuant to EQR’s incentive equity compensation and employee share purchase plans will result in ERPOP issuing units of partnership interest (“OP Units”) to EQR on a one-for-one basis, with ERPOP receiving the net cash proceeds of such issuances. See Note 12 for further discussion. Income and Other Taxes EQR has elected to be taxed as a REIT. This, along with the nature of the operations of its operating properties, resulted in no provision for federal income taxes at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their allocable share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level. Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes. The Company has elected taxable REIT subsidiary (“TRS”) status for certain of its corporate subsidiaries and, as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses. The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) included tax provisions which increased allowable interest expense deductions for 2019 and 2020 (no increases for 2021) and increased the ability for taxpayers to use net operating losses. These provisions did not result in a material impact to the Company’s taxable income or tax liabilities. The CARES Act also allowed corporations to request accelerated refunds of their alternative minimum tax (“AMT”) credit. Prior to enactment of this provision, the remaining credits would have been refunded in installments in 2020, 2021 and 2022. We received a refund of our remaining $1.6 million in AMT credits during the year ended December 31, 2020. The Company’s provision for income and other tax expense (benefit) was as follows for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 2020 2019 State and local income, franchise and excise tax (benefit) $ 915 $ 852 $ 963 Alternative minimum tax credit (benefit) (1) — — (3,244 ) Income and other tax expense (benefit) (2) $ 915 $ 852 $ (2,281 ) (1) As provided in recent tax legislation which repealed the AMT credit on corporations, in 2019 the Company claimed/received $1.6 million of refunds of various AMT credit carryovers generated in prior tax years. The provision originally allowed for carryover amounts to be refunded over four years, with 50% available in the first year. The remaining $1.6 million was received in 2020 as noted above. (2) All provisions for income tax amounts are current and none are deferred. During the years ended December 31, 2021, 2020 and 2019, the tax character of the Company’s dividends and distributions were as follows (unaudited): Year Ended December 31, 2021 (1) 2020 (2) 2019 (3) Tax character of dividends and distributions: Ordinary dividends $ 1.40791 $ 1.34739 $ 1.39604 Long-term capital gain 0.73687 0.77923 0.61243 Unrecaptured section 1250 gain 0.26522 0.24838 0.23403 Dividends and distributions per Common Share/Unit outstanding $ 2.41000 $ 2.37500 $ 2.24250 (1) The Company’s fourth quarter 2021 dividends and distributions of $0.6025 per Common Share/Unit outstanding will be included as taxable income in calendar year 2022. (2) The Company’s fourth quarter 2020 dividends and distributions of $0.6025 per Common Share/Unit outstanding was included as taxable income in calendar year 2021. (3 ) The Company’s fourth quarter 2019 dividends and distributions of $0.5675 per Common Share/Unit outstanding was included as taxable income in calendar year 2020. The Company issued Internal Revenue Service (“IRS”) Form 1099-DIV to shareholders to report the tax character of Company distributions consistent with these amounts. The Company provides additional information to assist shareholders in the preparation of their tax returns. For 2021, the Company reported an AMT preference adjustment equal to $0.06 per share and disclosed amounts defined under Treasury Regulation §1.1061-6(c) of the Internal Revenue Code as “One Year” and “Three Year” amounts equal to $0.02650 per share and $0.00584 per share, respectively. The unaudited cost of land and depreciable property, net of accumulated depreciation, for federal income tax purposes as of December 31, 2021 and 2020 was approximately $13.2 billion and $13.8 billion, respectively. Principles of Consolidation The Company may hold an interest in subsidiaries, partnerships, joint ventures and other similar entities and accounts for these interests in accordance with the consolidation guidance. The Company first determines whether to consolidate the entity as a variable interest entity (“VIE”) or voting interest entity, or to account for the interest under the equity method of accounting as an unconsolidated entity. In situations in which we have concluded that an entity qualifies as a VIE, it is generally because the equity investors of VIEs do not have sufficient equity at risk to finance their activities without additional subordinated financial support or do not have substantive voting rights. The Company consolidates an entity when it is considered to be the primary beneficiary of the VIE or when it controls the entity through ownership of a majority voting interest. A primary beneficiary has the power to direct the activities that most significantly impact the VIE’s performance and has the obligation to absorb the expected losses or the right to receive the expected residual returns that could potentially be significant to the VIE. In evaluating whether the entity is a VIE and/or the Company is the primary beneficiary of the entity, the Company considers several factors, including, but not limited to, proportionate share or ownership of the VIE, funding and financing sources, the business purpose of the entity, related parties, developer and property management fees and agreement terms regarding major decisions, participating and voting rights, contributions and distributions. Investments in Unconsolidated Entities The Company accounts for investments in unconsolidated entities under the equity method of accounting and measures the investments initially at cost. The Company subsequently adjusts the carrying amount by additional cash and non-cash contributions and distributions and its proportionate share of the earnings and losses of such entities. The proportionate share of the earnings and losses are also recognized in the consolidated statements of operations and comprehensive income. In addition, we may earn fees for providing property management services or construction oversight. Noncontrolling Interests A noncontrolling interest in a subsidiary (minority interest) is an ownership interest in the consolidated entity that should be reported as equity in the consolidated financial statements and separate from the parent company’s equity. In addition, consolidated net income is required to be reported at amounts that include the amounts attributable to both the parent and the noncontrolling interest and the amount of consolidated net income attributable to the parent and the noncontrolling interest are required to be disclosed on the face of the consolidated statements of operations and comprehensive income. See Note 3 for further discussion. Operating Partnership: Net income is allocated to noncontrolling interests based on their respective ownership percentage of the Operating Partnership. The ownership percentage is calculated by dividing the number of OP Units held by the noncontrolling interests by the total OP Units held by the noncontrolling interests and EQR. Issuance of additional Common Shares and OP Units changes the ownership interests of both the noncontrolling interests and EQR. Such transactions and the related proceeds are treated as capital transactions. Partially Owned Properties: The Company reflects noncontrolling interests in partially owned properties on the balance sheet for the portion of properties consolidated by the Company that are not wholly owned by the Company. The earnings or losses from those properties attributable to the noncontrolling interests are generally based on ownership percentage and are reflected as noncontrolling interests in partially owned properties in the consolidated statements of operations and comprehensive income. Partners’ Capital The “Limited Partners” of ERPOP include various individuals and entities that contributed their properties to ERPOP in exchange for OP Units. The “General Partner” of ERPOP is EQR. Net income is allocated to the Limited Partners based on their respective ownership percentage of ERPOP. The ownership percentage is calculated by dividing the number of OP Units held by the Limited Partners by the total OP Units held by the Limited Partners and the General Partner. Issuance of additional Common Shares and OP Units changes the ownership interests of both the Limited Partners and EQR. Such transactions and the related proceeds are treated as capital transactions. Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners The Company classifies Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners in the mezzanine section of the consolidated balance sheets for the portion of OP Units that EQR is required, either by contract or securities law, to deliver registered Common Shares to the exchanging OP Unit holder. The redeemable noncontrolling interest units / redeemable limited partner units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. See Note 3 for further discussion. Use of Estimates In preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States, management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Reclassifications Certain reclassifications considered necessary for a fair presentation have been made to the prior period financial statements in order to conform to the current year presentation. These reclassifications have not changed the results of operations or equity/capital. Recently Issued Accounting Pronouncements In August 2020, the Financial Accounting Standards Board (“FASB”) issued an amendment to the debt and equity financial instruments standards which simplifies the accounting for convertible instruments and accounting for contracts in an entity’s own equity. Instead of being required to assess whether an equity contract permits settlement in unregistered shares, which may require a legal analysis under the securities laws, entities will only analyze whether cash settlements are explicitly required when registered shares are unavailable. As a result, such contracts may potentially be classified in permanent rather than mezzanine equity, which may affect the way the Company’s OP Units are presented on its financial statements. The update is effective for the Company beginning on January 1, 2022, as the Company did not early adopt the standard as allowed on January 1, 2021. The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position. Recently Adopted Accounting Pronouncements In August 2021, the FASB issued an amendment to the presentation of financial statements standard which aligns the financial statements and disclosure requirements with those of the final rules released by the SEC in May 2020. The amendment changes the significance tests that determine what disclosures about significant business acquisitions are required, the periods the financial statements must cover and the pro forma financial information that must be included in certain reports. The amendment was effective for the Company upon issuance on August 9, 2021. The Company has not yet acquired businesses that exceed the threshold as defined by the standard, therefore, the amendment did not have a material effect on its consolidated results of operations and financial position. In March 2020, the FASB issued an amendment to the reference rate reform standard which provides the option for a limited period of time to ease the potential burden in accounting for, or recognizing the effects of, reference rate reform on contract modifications and hedge accounting. An example of such reform is the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. Entities that make this optional expedient election would not have to remeasure the contracts at the modification date or reassess the accounting treatment if certain criteria are met and would continue applying hedge accounting for relationships affected by reference rate reform. The new standard was effective for the Company upon issuance and elections can be made through December 31, 2022. The Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. The Company continues to evaluate the impact of the guidance and may apply other elections as applicable as additional changes in the market occur. In April 2020, a FASB staff question and answer document was issued which intended to reduce the challenges of evaluating the enforceable rights and obligations of leases for concessions granted to lessees in response to the COVID-19 pandemic. We elected not to evaluate whether qualifying concessions provided by the Company in response to the COVID-19 pandemic are a lease modification, subject to the criteria that the total payments under the amended lease cannot result in a substantial increase in the rights of the lessor or obligations of the lessee. We also elected to treat the concessions as though they were contemplated as part of the existing contracts and therefore will not apply lease modification rules to the qualifying lease concession amendments. As such, deferrals deemed collectible are recorded as rental receivables with no change to timing of rental revenues and deferrals deemed non-collectible and abatements reduce rental revenues in the deferral/abatement period and cause rental revenues to effectively follow a cash basis related to the changes. The accounting elections provided by the FASB mainly apply to the Company’s non-residential leases and the majority of the amendments will not require a straight-line adjustment. See Note 8 for additional discussion. In June 2016, the FASB issued a standard which requires companies to adopt a new approach for estimating credit losses on certain types of financial instruments, such as trade and other receivabl

Equity, Capital and Other Inter

Equity, Capital and Other Interests	12 Months Ended
	Dec. 31, 2021
Equity Capital And Other Interests [Abstract]
Equity, Capital and Other Interests	3. Equity, Capital and Other Interests The Company refers to “Common Shares” and “Units” (which refer to both OP Units and restricted units) as equity securities for EQR and “General Partner Units” and “Limited Partner Units” as equity securities for ERPOP. To provide a streamlined and more readable presentation of the disclosures for the Company and the Operating Partnership, several sections below refer to the respective terminology for each with the same financial information and separate sections are provided, where needed, to further distinguish any differences in financial information and terminology. The following table presents the changes in the Company’s issued and outstanding Common Shares and Units for the years ended December 31, 2021, 2020 and 2019: 2021 2020 2019 Common Shares Common Shares outstanding at January 1, 372,302,000 371,670,884 369,405,161 Common Shares Issued: Conversion of OP Units 1,354,208 122,505 313,940 Exercise of share options 1,710,692 239,695 1,745,050 Employee Share Purchase Plan (ESPP) 70,702 90,196 48,131 Restricted share grants, net 89,593 178,720 158,602 Common Shares outstanding at December 31, 375,527,195 372,302,000 371,670,884 Units Units outstanding at January 1, 13,858,073 13,731,315 13,904,035 Restricted unit grants, net 155,162 249,263 141,220 Conversion of OP Units to Common Shares (1,354,208 ) (122,505 ) (313,940 ) Units outstanding at December 31, 12,659,027 13,858,073 13,731,315 Total Common Shares and Units outstanding at December 31, 388,186,222 386,160,073 385,402,199 Units Ownership Interest in Operating Partnership 3.3 % 3.6 % 3.6 % The following table presents the changes in the Operating Partnership’s issued and outstanding General Partner Units and Limited Partner Units for the years ended December 31, 2021, 2020 and 2019: 2021 2020 2019 General and Limited Partner Units General and Limited Partner Units outstanding at January 1, 386,160,073 385,402,199 383,309,196 Issued to General Partner: Exercise of EQR share options 1,710,692 239,695 1,745,050 EQR’s Employee Share Purchase Plan (ESPP) 70,702 90,196 48,131 EQR’s restricted share grants, net 89,593 178,720 158,602 Issued to Limited Partners: Restricted unit grants, net 155,162 249,263 141,220 General and Limited Partner Units outstanding at December 31, 388,186,222 386,160,073 385,402,199 Limited Partner Units Limited Partner Units outstanding at January 1, 13,858,073 13,731,315 13,904,035 Limited Partner restricted unit grants, net 155,162 249,263 141,220 Conversion of Limited Partner OP Units to EQR Common Shares (1,354,208 ) (122,505 ) (313,940 ) Limited Partner Units outstanding at December 31, 12,659,027 13,858,073 13,731,315 Limited Partner Units Ownership Interest in Operating Partnership 3.3 % 3.6 % 3.6 % The equity positions of various individuals and entities that contributed their properties to the Operating Partnership in exchange for OP Units, as well as the equity positions of the holders of restricted units, are collectively referred to as the “Noncontrolling Interests – Operating Partnership” and “Limited Partners Capital,” respectively, for the Company and the Operating Partnership. Subject to certain exceptions (including the “book-up” requirements of restricted units), the Noncontrolling Interests – Operating Partnership/Limited Partners Capital may exchange their Units with EQR for Common Shares on a one-for-one basis. The carrying value of the Noncontrolling Interests – Operating Partnership/Limited Partners Capital (including redeemable interests) is allocated based on the number of Noncontrolling Interests – Operating Partnership/Limited Partners Capital in total in proportion to the number of Noncontrolling Interests – Operating Partnership/Limited Partners Capital in total plus the total number of Common Shares/General Partner Units. Net income is allocated to the Noncontrolling Interests – Operating Partnership/Limited Partners Capital based on the weighted average ownership percentage during the period. The Operating Partnership has the right but not the obligation to make a cash payment instead of issuing Common Shares to any and all holders of Noncontrolling Interests – Operating Partnership/Limited Partners Capital requesting an exchange of their Noncontrolling Interests – Operating Partnership/Limited Partners Capital with EQR. Once the Operating Partnership elects not to redeem the Noncontrolling Interests – Operating Partnership/Limited Partners Capital for cash, EQR is obligated to deliver Common Shares to the exchanging holder of the Noncontrolling Interests – Operating Partnership/Limited Partners Capital. The Noncontrolling Interests – Operating Partnership/Limited Partners Capital are classified as either mezzanine equity or permanent equity. If EQR is required, either by contract or securities law, to deliver registered Common Shares, such Noncontrolling Interests – Operating Partnership/Limited Partners Capital are differentiated and referred to as “Redeemable Noncontrolling Interests – Operating Partnership” and “Redeemable Limited Partners,” respectively. Instruments that require settlement in registered shares cannot be classified in permanent equity as it is not always completely within an issuer’s control to deliver registered shares. Therefore, settlement in cash is assumed and that responsibility for settlement in cash is deemed to fall to the Operating Partnership as the primary source of cash for EQR, resulting in presentation in the mezzanine section of the balance sheet. The Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Noncontrolling Interests – Operating Partnership/Limited Partners Capital that are classified in permanent equity at December 31, 2021 and 2020. The carrying value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners is allocated based on the number of Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners in proportion to the number of Noncontrolling Interests – Operating Partnership/Limited Partners Capital in total. Such percentage of the total carrying value of Units/Limited Partner Units which is ascribed to the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners is then adjusted to the greater of carrying value or fair market value as described above. As of December 31, 2021 and 2020, the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners have a redemption value of approximately $499.0 million and $339.0 million, respectively, which represents the value of Common Shares that would be issued in exchange for the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners. The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): 2021 2020 2019 Balance at January 1, $ 338,951 $ 463,400 $ 379,106 Change in market value 158,598 (125,224 ) 82,283 Change in carrying value 1,428 775 2,011 Balance at December 31, $ 498,977 $ 338,951 $ 463,400 Net proceeds from EQR Common Share and Preferred Share (see definition below) offerings and proceeds from exercise of options for Common Shares are contributed by EQR to ERPOP. In return for those contributions, EQR receives a number of OP Units in ERPOP equal to the number of Common Shares it has issued in the equity offering (or in the case of a preferred equity offering, a number of preference units in ERPOP equal in number and having the same terms as the Preferred Shares issued in the equity offering). As a result, the net proceeds from Common Shares and Preferred Shares are allocated for the Company between shareholders’ equity and Noncontrolling Interests – Operating Partnership and for the Operating Partnership between General Partner’s Capital and Limited Partners Capital to account for the change in their respective percentage ownership of the underlying equity. The Company’s declaration of trust authorizes it to issue up to 100,000,000 preferred shares of beneficial interest, $0.01 par value per share (the “Preferred Shares”), with specific rights, preferences and other attributes as the Board of Trustees may determine, which may include preferences, powers and rights that are senior to the rights of holders of the Company’s Common Shares. The following table presents the Company’s issued and outstanding Preferred Shares/Preference Units as of December 31, 2021 and 2020: Amounts in thousands Annual Call Dividend Per December 31, December 31, Date (1) Share/Unit (2) 2021 2020 Preferred Shares/Preference Units of beneficial interest, $0.01 par value; 100,000,000 shares authorized: 8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of December 31, 2021 and 2020 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the call date, redeemable Preferred Shares/Preference Units may be redeemed for cash at the option of the Company or the Operating Partnership, respectively, in whole or in part, at a redemption price equal to the liquidation price per share/unit, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares/Preference Units are payable quarterly. Other EQR and ERPOP currently have an active universal shelf registration statement for the issuance of equity and debt securities that automatically became effective upon filing with the SEC in June 2019 and expires in June 2022. Per the terms of ERPOP’s partnership agreement, EQR contributes the net proceeds of all equity offerings to the capital of ERPOP in exchange for additional OP Units (on a one-for-one Common Share per OP Unit basis) or preference units (on a one-for-one preferred share per preference unit basis). The Company has an At-The-Market (“ATM”) share offering program which allows EQR to issue Common Shares from time to time into the existing trading market at current market prices or through negotiated transactions, including under forward sale arrangements. The current program matures in June 2022 and gives EQR the authority to issue up to 13.0 million shares, all of which remain outstanding as of December 31, 2021, pending the settlement of the outstanding forward sale agreements. These forward sale agreements allow the Company, at its election, to settle the agreements by issuing Common Shares in exchange for net proceeds at the then-applicable forward sale price specified by the agreement or, alternatively, to settle the agreements in whole or in part through the delivery or receipt of Common Shares or cash. Issuances of shares under these forward sale agreements are classified as equity transactions. Accordingly, no amounts relating to the forward sale agreements are recorded in the consolidated financial statements until settlement occurs. Prior to any settlements, the only impact to the consolidated financial statements is the inclusion of incremental shares, if any, within the calculation of diluted net income per share using the treasury stock method (see Note 11 for additional discussion). The actual forward price per share to be received by the Company upon settlement will be determined on the applicable settlement date based on adjustments made to the initial forward price to reflect the then-current overnight federal funds rate and the amount of dividends paid to holders of the Company’s Common Shares over the term of the forward sale agreement. As of December 31, 2021, the Company had entered into such forward sale agreements under this program for a total of approximately 1.7 million Common Shares at a weighted average initial forward price per share of $83.25. All of these forward sale agreements were entered into during the quarter ended September 30, 2021. As of December 31, 2021, no shares under the forward sale agreements had been settled. These forward sale agreements must be settled by March 2023. The Company may repurchase up to 13.0 million Common Shares under its share repurchase program. No open market repurchases have occurred since 2008 and no repurchases of any kind have occurred since February 2014. As of December 31, 2021, EQR has remaining authorization to repurchase up to 13.0 million of its shares.

Real Estate

Real Estate	12 Months Ended
	Dec. 31, 2021
Real Estate [Abstract]
Real Estate	4. Real Estate The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of December 31, 2021 and 2020 (amounts in thousands): 2021 2020 Land $ 5,814,790 $ 5,785,367 Depreciable property: Buildings and improvements 19,632,284 18,464,484 Furniture, fixtures and equipment 2,220,203 1,970,033 In-Place lease intangibles 518,324 486,137 Projects under development: Land — 23,531 Construction-in-progress 24,307 387,603 Land held for development: Land 46,160 46,160 Construction-in-progress 16,838 40,010 Investment in real estate 28,272,906 27,203,325 Accumulated depreciation (8,354,282 ) (7,859,657 ) Investment in real estate, net $ 19,918,624 $ 19,343,668 Acquisitions and Dispositions During the year ended December 31, 2021, the Company acquired the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 17 4,747 $ 1,709,379 Total 17 4,747 $ 1,709,379 (1) Purchase price includes an allocation of approximately $226.3 million to land and $1.5 billion to depreciable property (inclusive of capitalized closing costs). During the year ended December 31, 2020, the Company acquired the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 1 158 $ 48,860 Total 1 158 $ 48,860 (1) Purchase price includes an allocation of approximately $5.5 million to land and $43.4 million to depreciable property (inclusive of capitalized closing costs). During the year ended December 31, 2021, the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Rental Properties – Consolidated 14 3,053 $ 1,716,775 Total 14 3,053 $ 1,716,775 The Company recognized a net gain on sales of real estate properties of approximately $1.1 billion on the above sales. During the year ended December 31, 2020, the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Rental Properties – Consolidated 6 2,231 $ 1,066,861 Land Parcels (two) — — 55,510 Total 6 2,231 $ 1,122,371 The Company recognized a net gain on sales of real estate properties of approximately $531.8 million and a net gain on sales of land parcels of approximately $34.2 million on the above sales. Impairment During the year ended December 31, 2021, the Company recorded an approximate $16.8 million non-cash asset impairment charge on a land parcel which is included in land held for development on the consolidated balance sheets and included in the non-same store/other segment discussed in Note 17. The charge was the result of an analysis of the parcel’s estimated fair value (determined using internally developed models based on market assumptions and potential sales data from the marketing process) compared to its current capitalized carrying value after reassessment of our expected hold period for the parcel. The parcel now has a carrying value of $15.0 million.

Commitments to Acquire_Dispose

Commitments to Acquire/Dispose of Real Estate	12 Months Ended
	Dec. 31, 2021
Commitments To Acquire Dispose Of Real Estate [Abstract]
Commitments to Acquire/Dispose of Real Estate	5. Commitments to Acquire/Dispose of Real Estate The Company has not entered into any agreements to acquire rental properties or land parcels as of the date of filing. The Company has entered into separate agreements to dispose of the following (sales price and net book value in thousands): Properties Apartment Units Sales Price Net Book Value at December 31, 2021 Rental Properties – Consolidated 2 490 $ 331,150 $ 191,196 Total 2 490 $ 331,150 $ 191,196 The closing of pending transactions is subject to certain conditions and restrictions; therefore, there can be no assurance that the transactions will be consummated or that the final terms will not differ in material respects from any agreements summarized above. See Note 18 for discussion of the properties acquired or disposed of, if any, subsequent to December 31, 2021.

Investments in Partially Owned

Investments in Partially Owned Entities	12 Months Ended
	Dec. 31, 2021
Investments In Partially Owned Entities [Abstract]
Investments in Partially Owned Entities	6. Investments in Partially Owned Entities The Company has invested in various entities with unrelated third parties which are either consolidated or accounted for under the equity method of accounting (unconsolidated). Consolidated VIEs In accordance with accounting standards for consolidation of VIEs, the Company consolidates ERPOP on EQR’s financial statements. As the sole general partner of ERPOP, EQR has exclusive control of ERPOP’s day-to-day management. The limited partners are not able to exercise substantive kick-out or participating rights. As a result, ERPOP qualifies as a VIE. EQR has a controlling financial interest in ERPOP and, thus, is ERPOP’s primary beneficiary. EQR has the power to direct the activities of ERPOP that most significantly impact ERPOP’s economic performance as well as the obligation to absorb losses or the right to receive benefits from ERPOP that could potentially be significant to ERPOP. The Company has various equity interests in certain joint ventures that have been deemed to be VIEs , and the Company is the VIEs’ primary beneficiary. As a result, the joint ventures are required to be consolidated on the Company’s financial statements. The following table summarizes the Company’s consolidated joint venture s as of December 31, 2021 : Operating Properties Project Under Development (1) Properties Apartment Units Project Apartment Units Consolidated Joint Ventures (VIE) 16 3,546 1 312 (1) The land under this project is subject to a long-term ground lease. The following table provides consolidated assets and liabilities related to the VIEs discussed above as of December 31, 2021 2020 December 31, 2021 December 31, 2020 Consolidated Assets $ 912,955 $ 784,066 Consolidated Liabilities $ 251,424 $ 223,989 Investments in Unconsolidated Entities The following table and information summarizes the Company’s investments in unconsolidated entities, which are accounted for under the equity method of accounting as the requirements for consolidation are not met, as of December 31, 2021 December 31, 2021 December 31, 2020 Ownership Percentage Investments in Unconsolidated Entities: Operating Property (VIE) (1) $ 36,024 $ 38,288 33.3% Unconsolidated Development Joint Ventures (VIE) (2) 72,488 — 62% - 90% (4) Real Estate Technology (3) 19,347 14,866 Varies Other (411 ) (372 ) Varies Investments in Unconsolidated Entities $ 127,448 $ 52,782 (1) Represents an unconsolidated interest in an entity that owns the land underlying one of the consolidated joint venture properties noted above and owns and operates a related parking facility. The consolidated joint venture (2) Represents unconsolidated interests in projects under development and land held for development. (3) Represents unconsolidated investments in real estate technology funds/companies. (4) In certain instances, the joint venture agreements contain provisions for promoted interests in favor of our joint venture partner. If the terms of the promoted interest are attained, then our share of the proceeds from a sale or other capital event of the unconsolidated entity may be less than the indicated ownership percentage. The following table summarizes the Company’s unconsolidated joint ventures that were deemed to be VIEs as of December 31, 2021 Operating Property (1) Projects Under Development (2) Land Held for Development (2), (3) Entity Projects Apartment Units (4) Projects Apartment Units (4) Unconsolidated Joint Ventures (VIE) 1 3 929 3 1,005 (1) Represents the (2) Represents separate unconsolidated joint ventures for the purpose of developing multifamily rental properties. ( 3 ) Represents separate unconsolidated joint ventures that are expected to start construction in 2022. One parcel is subject to a long-term ground lease. ( 4 ) Represents the intended number of apartment units. New Joint Ventures In August 2021, the Company entered into a strategic partnership with Toll Brothers, Inc. (“Toll”) to develop apartment communities in key markets. The Company and Toll will enter into separate joint venture agreements for each property, and the Company will account for these unconsolidated joint ventures under the equity method of accounting. Toll will act as the managing member of each project and receive developer fees. The Company, in certain circumstances, may act as the property manager, receive property management fees and have the right, but not the obligation, to acquire each property at fair market value upon stabilization. As of December 31, 2021, the Company and Toll entered into three separate joint venture agreements under the strategic partnership (included in the table below). The following table provides information on total unconsolidated development joint ventures entered into during the year ended December 31, 2021 Number of unconsolidated joint ventures (1) (2) 6 EQR's investments in unconsolidated entities – acquisitions $ 48,534 ( 1 ) The entities qualify as VIEs, but the Company is not the primary beneficiary because it does not have the power to direct the activities that most significantly impact the VIE’s performance. Therefore, these entities are unconsolidated and recorded using the equity method of accounting. ( 2 ) One parcel is subject to a long-term ground lease.

Restricted Deposits

Restricted Deposits	12 Months Ended
	Dec. 31, 2021
Deposits Restricted [Abstract]
Restricted Deposits	7. Restricted Deposits The following table presents the Company’s restricted deposits as of December 31, 2021 and 2020 (amounts in thousands): December 31, 2021 December 31, 2020 Mortgage escrow deposits: Replacement reserves $ 11,156 $ 9,877 Mortgage principal reserves/sinking funds 19,104 14,168 Mortgage escrow deposits 30,260 24,045 Restricted cash: Tax-deferred (1031) exchange proceeds 166,362 — Earnest money on pending acquisitions 2,000 — Restricted deposits on real estate investments 284 307 Resident security and utility deposits 35,663 31,412 Other 1,835 1,373 Restricted cash 206,144 33,092 Restricted deposits $ 236,404 $ 57,137

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	8 . Leases Lessor Accounting The Company is the lessor for its residential and non-residential leases and these leases are accounted for as operating leases under the lease standard. For the years ended December 31, 2021, 2020 and 2019, approximately 97%, 98% and 97%, respectively, of the Company’s total lease revenue is generated from residential apartment leases that are generally twelve months or less in length. The residential apartment leases may include lease income related to such items as utility recoveries, parking rent, storage rent and pet rent that the Company treats as a single lease component because the amenities cannot be leased on their own and the timing and pattern of revenue recognition are the same. The collection of lease payments at lease commencement is probable and therefore the Company subsequently recognizes lease income over the lease term on a straight-line basis. Residential leases are renewable upon consent of both parties on an annual or monthly basis. For the years ended December 31, 2021, 2020 and 2019, approximately 3%, 2% and 3%, respectively, of the Company’s total lease revenue is generated by non-residential leases that are generally for terms ranging between five to ten years. The non-residential leases generally consist of ground floor retail spaces and master-leased parking garages that serve as additional amenities for our residents. The non-residential leases may include lease income related to such items as utility recoveries, parking rent and storage rent that the Company treats as a single lease component because the amenities cannot be leased on their own and the timing and pattern of revenue recognition are the same. The collection of lease payments at lease commencement is probable and therefore the Company subsequently recognizes lease income over the lease term on a straight-line basis. Non-residential leases are renewable with market-based renewal options. The Company elected the practical expedient to account for both its lease and non-lease components (specifically common area maintenance charges) as a single lease component under the lease standard. The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Year Ended December 31, 2019 Income Type Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential and non-residential rent $ 2,199,986 $ 61,033 $ 2,261,019 $ 2,336,778 $ 51,663 $ 2,388,441 $ 2,414,201 $ 71,988 $ 2,486,189 Utility recoveries (RUBS income) (1) 74,846 723 75,569 70,699 677 71,376 67,659 917 68,576 Parking rent 40,934 565 41,499 38,743 412 39,155 37,557 348 37,905 Other lease revenue (2) (17,667 ) 4,027 (13,640 ) (28,663 ) (5,519 ) (34,182 ) 1,979 (820 ) 1,159 Total lease revenue $ 2,298,099 $ 66,348 2,364,447 $ 2,417,557 $ 47,233 2,464,790 $ 2,521,396 $ 72,433 2,593,829 Parking revenue 26,789 22,210 28,272 Other revenue 72,761 84,705 78,590 Total other rental income (3) 99,550 106,915 106,862 Rental income $ 2,463,997 $ 2,571,705 $ 2,700,691 (1) RUBS income primarily consists of variable payments representing the recovery of utility costs from residents. (2) Other lease revenue consists of the revenue adjustment related to bad debt and other miscellaneous lease revenue. ( 3 ) Other rental income is accounted for under the revenue recognition standard. The economic impact of the pandemic on a subset of our residents and tenants has led to elevated levels of bad debt, which was reduced, in part, by governmental rental assistance payments paid on their behalf. We continue to work with our residents and tenants on payment plans and collections and our bad debt allowance policies remain consistent from those existing prior to the pandemic. The following table presents residential and non-residential accounts receivable and straight-line receivable balances for the Company’s properties as of December 31, 2021 and 2020 (amounts in thousands): Residential Non-Residential Balance Sheet (Other assets): December 31, 2021 December 31, 2020 December 31, 2021 December 31, 2020 Resident/tenant accounts receivable balances $ 37,959 $ 30,856 $ 3,218 $ 7,598 Allowance for doubtful accounts (33,121 ) (24,021 ) (2,365 ) (6,527 ) Net receivable balances $ 4,838 (1) $ 6,835 $ 853 $ 1,071 Straight-line receivable balances $ 7,460 $ 19,992 $ 13,021 $ 13,413 (1) The Company held residential security deposits approximating 48.2% of the net receivable balance at December 31, 2021 The following table presents residential bad debt for the Company’s properties for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, Income Statement (Rental income): 2021 2020 2019 Bad debt, net (1) $ 31,485 $ 42,505 $ 12,067 % of rental income 1.3 % 1.7 % 0.5 % (1) Bad debt, net benefited from additional resident payments due to governmental rental assistance programs Due to the impact of COVID-19 and the resulting economic impact on our non-residential tenants, we recognized a non-cash write-off of non-residential straight-line lease receivables of approximately $0.8 million and $13.2 million during the years ended December 31, 2021 December 31, 2021 and 2020, respectively, Lessee Accounting The Company is the lessee under various corporate office and ground leases for which the Company recognizes right-of-use (“ROU”) assets and related lease liabilities. The following table presents the Company’s ROU assets and related lease liabilities as of December 31, 2021 and 2020 (amounts in thousands): 2021 2020 Right-of-use assets: Corporate office leases (operating) $ 36,897 $ 39,203 Ground leases (finance) 97,575 57,584 Ground leases (operating) 340,241 402,500 Right-of-use assets $ 474,713 $ 499,287 Lease liabilities: Corporate office leases (operating) $ 37,760 $ 40,470 Ground leases (finance) 69,479 23,350 Ground leases (operating) 205,096 265,310 Lease liabilities $ 312,335 $ 329,130 Corporate office leases The Company leases eight corporate offices with lease expiration dates ranging from 2022 through 2042 (inclusive of applicable extension options). See Note 15 for details on a corporate office lease with a related party. Ground leases The Company maintains long-term ground leases for 15 operating properties and one project under development with lease expiration dates ranging from 2042 through 2118 (inclusive of applicable purchase options). The Company owns the building and improvements. During the year ended December 31, 2021, the Company modified one ground lease that was previously classified as an operating lease. The Company now classifies this lease as a finance lease and reduced its lease liability and ROU asset due to remeasurement by approximately $11.3 million. Additional disclosures The following tables illustrate the quantitative disclosures for lessees as of and for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Year Ended December 31, 2019 Lease cost: Finance lease cost: Amortization of right-of-use assets (capitalized) $ 351 $ — $ — Amortization of right-of-use assets (expensed) 1,391 — — Interest on lease liabilities (capitalized) 452 1,029 225 Interest on lease liabilities (expensed) 1,464 — — Operating lease cost: Corporate office leases 3,581 3,747 3,937 Ground leases 18,338 22,102 22,198 Variable lease cost: Corporate office leases 1,037 1,307 1,489 Ground leases 2,973 3,304 3,700 Total lease cost $ 29,587 $ 31,489 $ 31,549 December 31, 2021 December 31, 2020 December 31, 2019 Other information: Cash paid for amounts included in the measurement of lease liabilities: Investing cash flows from finance leases $ 383 $ 567 $ 188 Financing cash flows from finance leases $ 1,898 $ — $ 34,734 Operating cash flows from operating leases: Corporate office leases $ 5,016 $ 5,296 $ 5,494 Ground leases $ 14,682 $ 16,552 $ 16,837 ROU assets obtained in exchange for new finance lease liabilities $ — $ — $ 23,201 ROU assets obtained in exchange for new operating lease liabilities: Corporate office leases $ — $ — $ 44,298 Ground leases $ — $ — $ 422,018 Weighted-average remaining lease term – finance leases 25.2 years 18.7 years 19.7 years Weighted-average remaining lease term – operating leases: Corporate office leases 16.8 years 17.4 years 18.1 years Ground leases 61.8 years 55.3 years 56.2 years Weighted-average discount rate – finance leases 2.8 % 3.0 % 3.0 % Weighted-average discount rate – operating leases: Corporate office leases 3.2 % 3.2 % 3.2 % Ground leases 5.1 % 5.0 % 5.0 % The following table summarizes the Company’s undiscounted cash flows for contractual obligations for minimum rent payments/receipts under operating and financing leases for the next five years and thereafter as of December 31, 2021: (Payments)/Receipts Due by Year (in thousands) 2022 2023 2024 2025 2026 Thereafter Total Finance Leases: Minimum Rent Payments (a) $ (2,463 ) $ (2,662 ) $ (2,880 ) $ (2,946 ) $ (2,959 ) $ (88,209 ) $ (102,119 ) Operating Leases: Minimum Rent Payments (a) $ (15,090 ) $ (14,998 ) $ (15,131 ) $ (14,957 ) $ (14,843 ) $ (831,456 ) $ (906,475 ) Minimum Rent Receipts (b) $ 58,561 $ 56,754 $ 51,295 $ 45,091 $ 37,283 $ 135,922 $ 384,906 (a) Minimum basic rent due for corporate office leases and base rent due on ground leases where the Company is the lessee. (b) Minimum basic rent receipts due for various non-residential space where the Company is the lessor. Excludes residential leases due to their short-term nature. The following table provides a reconciliation of lease liabilities from our undiscounted cash flows for minimum rent payments as of December 31, 2021 (amounts in thousands): 2021 Total minimum rent payments $ 1,008,594 Less: Lease discount (696,259 ) Lease liabilities $ 312,335

Debt

Debt	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt	9 . Debt EQR does not have any indebtedness as all debt is incurred by the Operating Partnership. Weighted average interest rates noted below for the years ended December 31, 2021 and 2020 include the effect of any derivative instruments and amortization of premiums/discounts/OCI (other comprehensive income) on debt and derivatives. Mortgage Notes Payable The following tables summarize the Company’s mortgage notes payable activity for the years ended December 31, 2021 and 2020, respectively (amounts in thousands): Mortgage notes payable, net as of December 31, 2020 Proceeds Lump sum payoffs Scheduled principal repayments Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Mortgage notes payable, net as of December 31, 2021 Fixed Rate Debt: Secured – Conventional $ 1,901,091 $ 28,500 (2) $ (28,200 ) $ (7,465 ) $ 1,522 $ 1,024 $ 1,896,472 Floating Rate Debt: Secured – Conventional 31,494 29,928 (3) — — — (1,532 ) 59,890 Secured – Tax Exempt 361,305 — (128,615 ) — 1,242 907 234,839 Floating Rate Debt 392,799 29,928 (128,615 ) — 1,242 (625 ) 294,729 Total $ 2,293,890 $ 58,428 $ (156,815 ) $ (7,465 ) $ 2,764 $ 399 $ 2,191,201 (1 ) Represents amortization of deferred financing costs, net of debt financing costs. (2 ) Obtained 3.58% fixed rate mortgage debt maturing on March 1, 2031. ( 3 ) Variable rate construction mortgage debt that is non-recourse to the Company maturing on June 25, 2022 (total commitment of $67.6 million). Mortgage notes payable, net as of December 31, 2019 Proceeds Lump sum payoffs Scheduled principal repayments Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Mortgage notes payable, net as of December 31, 2020 Fixed Rate Debt: Secured – Conventional $ 1,574,699 $ 495,000 (2) $ (160,522 ) $ (7,759 ) $ 988 $ (1,315 ) $ 1,901,091 Floating Rate Debt: Secured – Conventional 7,050 24,204 (3) — — — 240 31,494 Secured – Tax Exempt 359,861 — — — 1,246 198 361,305 Floating Rate Debt 366,911 24,204 — — 1,246 438 392,799 Total $ 1,941,610 $ 519,204 $ (160,522 ) $ (7,759 ) $ 2,234 $ (877 ) $ 2,293,890 (1 ) Represents amortization of deferred financing costs, net of debt financing costs. (2) Obtained a 2.60% fixed rate mortgage loan pool maturing on May 1, 2030. ( 3 ) Variable rate construction mortgage debt that is non-recourse to the Company maturing on June 25, 2022 (total commitment of $67.6 million). The following table summarizes certain interest rate and maturity date information as of and for the years ended December 31, 2021 and 2020, respectively: December 31, 2021 December 31, 2020 Interest Rate Ranges 0.06% - 4.21% 0.06% - 4.71% Weighted Average Interest Rate 3.18% 3.33% Maturity Date Ranges 2022-2061 2021-2061 As of December 31, 2021 and 2020, the Company had $250.0 million and $281.7 million, respectively, of secured debt (primarily tax-exempt bonds) subject to third-party credit enhancement. The historical cost, net of accumulated depreciation, of encumbered properties was $2.7 billion and $2.9 billion at December 31, 2021 and 2020, respectively. Notes The following tables summarize the Company’s notes activity for the years ended December 31, 2021 and 2020, respectively (amounts in thousands): Notes, net as of December 31, 2020 Proceeds Lump sum payoffs Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Notes, net as of December 31, 2021 Fixed Rate Debt: Unsecured – Public $ 5,335,536 $ 497,470 (2) $ — $ 2,538 $ (322 ) $ 5,835,222 (1) Represents amortization of deferred financing costs, net of debt financing costs. (2) Issued $500.0 million of ten-year 1.85% unsecured notes, receiving net proceeds before underwriting fees and other expenses. Notes, net as of December 31, 2019 Proceeds Lump sum payoffs Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Notes, net as of December 31, 2020 Fixed Rate Debt: Unsecured – Public $ 6,077,513 $ — $ (750,000 ) $ 2,997 $ 5,026 $ 5,335,536 (1) Represents amortization of deferred financing costs, net of debt financing costs. The following table summarizes certain interest rate and maturity date information as of and for the years ended December 31, 2021 and 2020, respectively: December 31, 2021 December 31, 2020 Interest Rate Ranges 1.85% - 7.57% 2.50% - 7.57% Weighted Average Interest Rate 3.65% 4.03% Maturity Date Ranges 2023-2047 2023-2047 The Company’s unsecured public notes contain certain financial and operating covenants including, among other things, maintenance of certain financial ratios. The Company was in compliance with its unsecured public debt covenants for both the years ended December 31, 2021 and 2020. EQR and ERPOP currently have an active universal shelf registration statement for the issuance of equity and debt securities that automatically became effective upon filing with the SEC in June 2019 and expires in June 2022. Line of Credit and Commercial Paper The Company has a $2.5 billion unsecured revolving credit facility maturing November 1, 2024. The Company has the ability to increase available borrowings by an additional $750.0 million by adding lenders to the facility, obtaining the agreement of existing lenders to increase their commitments or incurring one or more term loans. The interest rate on advances under the facility will generally be LIBOR plus a spread (currently 0.775%), or based on bids received from the lending group, and the Company pays an annual facility fee (currently 0.125%). Both the spread and the facility fee are dependent on the Company’s senior unsecured credit rating. The weighted average interest rates on the revolving credit facility were 0.88% and 1.47% for the years ended December 31, 2021 and 2020, respectively. The Company has an unsecured commercial paper note program under which it may borrow up to a maximum of $1.0 billion subject to market conditions. The notes will be sold The Company limits its utilization of the revolving credit facility in order to maintain liquidity to support its $1.0 billion commercial paper program along with certain other obligations. The following table presents the availability on the Company’s unsecured revolving credit facility as of December 31, 2021 and 2020 (amounts in thousands): December 31, 2021 December 31, 2020 Unsecured revolving credit facility commitment $ 2,500,000 $ 2,500,000 Commercial paper balance outstanding (315,121 ) (415,000 ) Unsecured revolving credit facility balance outstanding — — Other restricted amounts (3,507 ) (100,949 ) Unsecured revolving credit facility availability $ 2,181,372 $ 1,984,051 Other The following table summarizes the Company’s total debt extinguishment costs recorded as additional interest expense during the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): December 31, 2021 December 31, 2020 December 31, 2019 Prepayment premiums/penalties $ — $ 26,150 $ 13,647 Write-offs of unamortized deferred financing costs 744 634 3,148 Write-offs of unamortized (premiums)/discounts/OCI — 12,508 7,196 Total $ 744 $ 39,292 $ 23,991 The following table provides a summary of the aggregate payments of principal on all debt for each of the next five years and thereafter as of December 31, 2021 (amounts in thousands): Year Total 2022 (1) $ 641,089 2023 1,329,088 2024 6,100 2025 458,200 2026 601,025 Thereafter 5,385,670 Subtotal 8,421,172 Deferred Financing Costs and Unamortized (Discount) (79,719 ) Total $ 8,341,453 (1) Includes $315.1 million in principal outstanding on the Company’s commercial paper program.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	10 . Fair Value Measurements The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments. The Company, where possible, bases the fair values of its financial instruments on listed market prices and third-party quotes. Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments. In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company may seek to manage these risks by following established risk management policies and procedures including the use of derivatives to hedge interest rate risk on debt instruments. The Company may also use derivatives to manage commodity prices in the daily operations of the business. During the year ended December 31, 2021, the Company purchased and sold investment securities and recognized a net gain on sale of $23.4 million, which is included in interest and other income in the consolidated statements of operations. The Company did not own any of these investment securities at December 31, 2021. A three-level valuation hierarchy exists for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels are defined as follows: • Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2 – Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. • Level 3 – Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The Company’s derivative positions are valued using models developed by the respective counterparty as well as models applied internally by the Company that use as their inputs readily observable market parameters (such as forward yield curves and credit default swap data). The following table summarizes the inputs to the valuations for each type of fair value measurement: Fair Value Measurement Type Valuation Inputs Employee holdings (other than Common Shares) within the supplemental executive retirement plan (the “SERP”) Quoted market prices for identical assets. These holdings are included in other assets and other liabilities on the consolidated balance sheets. Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Quoted market price of Common Shares. Mortgage notes payable and private unsecured debt (including its commercial paper and line of credit, if applicable) Indicative rates provided by lenders of similar loans. Public unsecured notes Quoted market prices for each underlying issuance. The fair values of the Company’s financial instruments (other than mortgage notes payable, unsecured notes, commercial paper, line of credit and derivative instruments), including cash and cash equivalents and other financial instruments, approximate their carrying or contract value. The following table provides a summary of the carrying and fair values for the Company’s mortgage notes payable and unsecured debt (including its commercial paper and line of credit, if applicable) at December 31, 2021 and 2020, respectively (amounts in thousands): December 31, 2021 December 31, 2020 Carrying Value Estimated Fair Value (Level 2) Carrying Value Estimated Fair Value (Level 2) Mortgage notes payable, net $ 2,191,201 $ 2,193,689 $ 2,293,890 $ 2,313,263 Unsecured debt, net 6,150,252 6,798,309 5,750,366 6,686,612 Total debt, net $ 8,341,453 $ 8,991,998 $ 8,044,256 $ 8,999,875 The following tables provide a summary of the fair value measurements for each major category of assets and liabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at December 31, 2021 and 2020, respectively (amounts in thousands): Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2021 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 164,650 $ 164,650 $ — $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 164,650 $ 164,650 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 498,977 $ — $ 498,977 $ — Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2020 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 160,293 $ 160,293 $ — $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 160,293 $ 160,293 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 338,951 $ — $ 338,951 $ — The following tables provide a summary of the effect of fair value hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): December 31, 2021 Type of Fair Value Hedge Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative Hedged Item Income Statement Location of Hedged Item Gain/(Loss) Amount of Gain/(Loss) Recognized in Income on Hedged Item Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps N/A $ — N/A N/A $ — Total $ — $ — December 31, 2020 Type of Fair Value Hedge Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative Hedged Item Income Statement Location of Hedged Item Gain/(Loss) Amount of Gain/(Loss) Recognized in Income on Hedged Item Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps N/A $ — N/A N/A $ — Total $ — $ — December 31, 2019 Type of Fair Value Hedge Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative Hedged Item Income Statement Location of Hedged Item Gain/(Loss) Amount of Gain/(Loss) Recognized in Income on Hedged Item Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ 2,277 Fixed rate debt Interest expense $ (2,277 ) Total $ 2,277 $ (2,277 ) The following tables provide a summary of the effect of cash flow hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): December 31, 2021 Type of Cash Flow Hedge Amount of Gain/(Loss) Recognized in OCI on Derivative Location of Gain/(Loss) Reclassified from Accumulated OCI into Income Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ — Interest expense $ (9,394 ) Total $ — $ (9,394 ) December 31, 2020 Type of Cash Flow Hedge Amount of Gain/(Loss) Recognized in OCI on Derivative Location of Gain/(Loss) Reclassified from Accumulated OCI into Income Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (1,190 ) Interest expense $ (35,087 ) Total $ (1,190 ) $ (35,087 ) December 31, 2019 Type of Cash Flow Hedge Amount of Gain/(Loss) Recognized in OCI on Derivative Location of Gain/(Loss) Reclassified from Accumulated OCI into Income Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (33,765 ) Interest expense $ (21,188 ) Total $ (33,765 ) $ (21,188 ) As of December 31, 2021 and 2020, there were approximately $34.3 million and $43.7 million in deferred losses, net, included in accumulated other comprehensive income (loss), respectively, related to derivative instruments, of which an estimated $10.6 million may be recognized as additional interest expense during the twelve months ending December 31, 2022. In April 2020, the Company paid approximately $1.2 million to settle two forward starting swaps in conjunction with the issuance of $495.0 million of ten-year In July 2019, six fair value interest rate swaps matured in conjunction with the maturity of $450.0 million of 2.375% unsecured notes. In June 2019, the Company paid approximately $41.8 million to settle ten forward starting swaps in conjunction with the issuance of $600.0 million of ten-year

Earnings Per Share and Earnings

Earnings Per Share and Earnings Per Unit	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share And Earnings Per Unit	1 1 . Earnings Per Share and Earnings Per Unit Equity Residential The following tables set forth the computation of net income per share – basic and net income per share – diluted for the Company (amounts in thousands except per share amounts): Year Ended December 31, 2021 2020 2019 Numerator for net income per share – basic: Net income $ 1,396,714 $ 962,501 $ 1,009,708 Allocation to Noncontrolling Interests – Operating Partnership (45,900 ) (34,010 ) (36,034 ) Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (17,964 ) (14,855 ) (3,297 ) Preferred distributions (3,090 ) (3,090 ) (3,090 ) Numerator for net income per share – basic $ 1,329,760 $ 910,546 $ 967,287 Numerator for net income per share – diluted: Net income $ 1,396,714 $ 962,501 $ 1,009,708 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (17,964 ) (14,855 ) (3,297 ) Preferred distributions (3,090 ) (3,090 ) (3,090 ) Numerator for net income per share – diluted $ 1,375,660 $ 944,556 $ 1,003,321 Denominator for net income per share – basic and diluted: Denominator for net income per share – basic 373,833 371,791 370,461 Effect of dilutive securities: OP Units 12,263 13,003 12,907 Long-term compensation shares/units 1,924 1,080 2,965 ATM forward sales 69 — — Denominator for net income per share – diluted 388,089 385,874 386,333 Net income per share – basic $ 3.56 $ 2.45 $ 2.61 Net income per share – diluted $ 3.54 $ 2.45 $ 2.60 ERP Operating Limited Partnership The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts): Year Ended December 31, 2021 2020 2019 Numerator for net income per Unit – basic and diluted: Net income $ 1,396,714 $ 962,501 $ 1,009,708 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (17,964 ) (14,855 ) (3,297 ) Allocation to Preference Units (3,090 ) (3,090 ) (3,090 ) Numerator for net income per Unit – basic and diluted $ 1,375,660 $ 944,556 $ 1,003,321 Denominator for net income per Unit – basic and diluted: Denominator for net income per Unit – basic 386,096 384,794 383,368 Effect of dilutive securities: Dilution for Units issuable upon assumed exercise/vesting of the Company’s long-term compensation shares/units 1,924 1,080 2,965 ATM forward sales 69 — — Denominator for net income per Unit – diluted 388,089 385,874 386,333 Net income per Unit – basic $ 3.56 $ 2.45 $ 2.61 Net income per Unit – diluted $ 3.54 $ 2.45 $ 2.60

Share Incentive Plans

Share Incentive Plans	12 Months Ended
	Dec. 31, 2021
Share Based Compensation [Abstract]
Share Incentive Plans	1 2 . Share Incentive Plans Any Common Shares issued pursuant to EQR’s incentive equity compensation and employee share purchase plans will result in ERPOP issuing OP Units to EQR on a one-for-one basis with ERPOP receiving the net cash proceeds of such issuances. Overview of Share Incentive Plans The 2019 Share Incentive Plan (the “2019 Plan”), as approved by the Company’s shareholders on June 27, 2019, expires on June 27, 2029 and reserves 11,331,958 Common Shares for issuance. All future awards will be granted under the 2019 Plan. As of December 31, 2021, 9,539,478 shares were available for future issuance. Pursuant to the 2019 Plan and the 2011 Share Incentive Plan (the “2011 Plan”) (collectively the “Share Incentive Plans”), officers, trustees, key employees and consultants of the Company and its subsidiaries may be granted share options to acquire Common Shares (“Options”), including non-qualified share options (“NQSOs”), incentive share options (“ISOs”) and share appreciation rights (“SARs”), or may be granted restricted or non-restricted shares/units (including long-term incentive plan awards), subject to conditions and restrictions. Options, SARs, restricted shares and restricted units are sometimes collectively referred to herein as “Awards.” The 2011 Plan will terminate when all outstanding Awards have expired or have been exercised/vested. The Board of Trustees may at any time amend or terminate the Share Incentive Plans, but termination will not affect Awards previously granted, absent immediate vesting and cash settlement. Any Options which had vested prior to such a termination would remain exercisable by the holder. Employee Long-Term Compensation Awards The following table summarizes the terms of Awards generally granted to employees: Options Restricted Shares Restricted Units Overview Options exercised after vesting result in issuance of new Common Shares. Restricted shareholders generally have the same voting rights and receive quarterly dividend payments on their shares at the same rate and on the same date as any other Common Share holder (1). When certain conditions are met, restricted units convert into an equal number of OP Units, which the holder may exchange for Common Shares on a one-for-one basis or at the option of the Company the cash value of such shares. Restricted unitholders receive quarterly distribution payments on their restricted units at the same rate and on the same date as any other OP Unit holder (1). Grant/Exercise Price Granted at the fair market value of Common Shares as of the grant date. Granted at the fair market value of Common Shares as of the grant date. Granted at varying discount rates to the fair market value of Common Shares as of the grant date (2). Vesting Period In three equal installments over a three-year period from the grant date. Three years from the grant date. Three years from the grant date. Expiration Ten years from the grant date. Not applicable. Ten years from the grant date (2). Upon Employee Termination Unvested options are canceled. Unvested restricted shares are canceled. Unvested restricted units are canceled. (1) Dividends/distributions paid on unvested restricted shares and units are included as a component of retained earnings and Noncontrolling Interest – Operating Partnership/Limited Partners Capital, respectively, and have not been considered in reducing net income available to Common Shares/Units in a manner similar to the Company’s preferred share/preference unit dividends for the earnings per share/Unit calculation. (2) A restricted unit will automatically convert to an OP Unit when the capital account of each restricted unit increases (“books-up”) to a specified target. The probability of a book-up occurring within the ten-year contractual life along with the liquidity risk associated with various hold period restrictions are both reflected in the discount. If the capital target is not attained within ten years following the date of issuance, the restricted unit will automatically be canceled and no compensation will be payable to the holder of such canceled restricted unit. If the capital target is attained and the restricted unit is converted to an OP Unit, it will not expire. Valuation Method of Share Options The fair value of the Option grants is recognized over the requisite service/vesting period of the Options. The fair value for the Company’s Options was estimated at the time the Options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions: 2021 2020 2019 Expected volatility (1) 21.3 % 15.2 % 16.3 % Expected life (2) 5 years 5 years 5 years Expected dividend yield (3) 3.23 % 3.04 % 3.10 % Risk-free interest rate (4) 0.50 % 1.32 % 2.43 % Exercise price per share (5) $ 67.48 $ 83.08 $ 72.02 Option valuation per share $ 7.96 $ 7.23 $ 8.06 (1) Expected volatility – Estimated based on the historical five-year (2) Expected life – Approximates the actual weighted average life of all Options granted since the Company went public in 1993. (3) Expected dividend yield – Calculated by averaging the historical annual yield on EQR shares for a period matching the expected life of each grant, with the annual yield calculated by dividing actual regular dividends (excluding any special dividends) by the average price of EQR’s shares in a given year. (4) Risk-free interest rate – The most current U.S. Treasury rate available at the grant date for a period matching the expected life of each grant. (5) Exercise price per share – The closing share price of the Common Shares on the grant date. The valuation method and assumptions are the same as those the Company used in accounting for Option expense in its consolidated financial statements. The Black-Scholes option valuation model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. This model is only one method of valuing options. Because the Company’s Options have characteristics significantly different from those of traded options, and because changes in the subjective input assumptions can materially affect the fair value estimate, the actual value of the Options to the recipient may be significantly different. Long-Term Incentive Plan The Company’s executive compensation program allows the Chairman, Chief Executive Officer and certain other executive officers to earn from 0% to 200% of the target number of long-term incentive (“LTI”) awards, payable in the form of restricted shares and/or restricted units. No payout would be made for any return below 50% of the target performance metric. The Company’s Total Shareholder Return (“TSR”) and Normalized Funds from Operations (“FFO”) results over a forward-looking three-year performance period determine the restricted shares and/or restricted units awarded and are compared to pre-established quantitative performance metrics. The grant date fair value of the awards is estimated using a Monte Carlo model for the TSR portion of the awards, and the resulting expense is recorded over the service period regardless of whether the TSR performance measures are achieved, while the Normalized FFO portion of the awards is adjusted based on the final achievement obtained. If the executive is retirement-eligible, the grant date fair value is amortized into expense over the first year. All other awards are amortized into expense over the three-year performance and vesting period. If employment is terminated prior to vesting, the restricted shares and restricted units are generally canceled. The LTI participants receive distributions only on restricted units awarded equal to 10% of the quarterly distributions paid on OP Units during the performance period. At the end of the performance period, LTI participants receive dividends/distributions actually earned on restricted shares or restricted units awarded during the performance period, less any distributions already paid on the restricted units. The grant date fair value of the TSR portion of the LTI awards is estimated using a multifactor Monte Carlo model to determine share prices for an absolute award for which the payout of the award only depends on EQR’s TSR and a set of relative awards for which the payout of the award depends on the spread of EQR’s TSR to the TSR of two indices: (a) the FTSE Nareit Apartment Index; and (b) the FTSE Nareit Equity Index. The grant date fair value of the Normalized FFO portion of the LTI awards is estimated using the closing price of EQR Common Shares on the grant date for the restricted shares and a discounted closing price of EQR Common Shares on the grant date for the restricted units to reflect the “book-up” and liquidity risk inherent in the units. The individual prices determined above are then weighted to arrive at the final values for each restricted share/unit as follows: 2021 2020 2019 Weighted average fair value per restricted share $ 61.73 $ 75.89 $ 65.36 Weighted average fair value per restricted unit $ 59.82 $ 72.69 $ 63.12 The valuation method and assumptions are the same as those the Company used in accounting for restricted share/unit expense in its consolidated financial statements. The Monte Carlo valuation model is only one method of valuing awards. Because the Company’s restricted shares/units have characteristics significantly different from those of traded shares /units , and because changes in the subjective input assumptions can materially affect the fair value estimate, the actual value of the restricted shares/units to the recipient may be significantly different. Trustees All Trustees, with the exception of the Company’s Chairman and employee Trustees, are granted Options, restricted shares and/or restricted units that vest one-year from the grant date that corresponds to the term for which he or she has been elected to serve. Since 2016, the Chairman has only received awards under the LTI plan (see further discussion above). Retirement Benefits The Company’s Share Incentive Plans provide for certain benefits upon retirement. The following table summarizes the terms of each retirement eligibility category. Age 62 for Employees Rule of 70 for Employees Age 72 for Trustees Eligibility For employees hired prior to January 1, 2009 and who were age 59 or older as of February 1, 2019. All employees (1). All non-employee Trustees. Effect on unvested restricted shares, restricted units and Options Awards immediately vest and Options continue to be exercisable for the balance of the applicable ten-year option period. Awards continue to vest per the original vesting schedule, subject to certain conditions, and Options continue to be exercisable for the balance of the applicable ten-year option period. Awards immediately vest and Options continue to be exercisable for the balance of the applicable ten-year option period. Effect on LTI Plan Awards are prorated in proportion to the number of days worked in the first year of the three-year performance period and the individual does not receive any payout of shares or units until the final payout is determined at the end of the three-year performance period. (1) The Rule of 70 is met when an employee’s years of service with the Company (which must be at least 15 years) plus his or her age (which must be at least 55 years) on the date of termination equals or exceeds 70 years. In addition, the employee must give the Company at least six months’ advance written notice of his or her intention to retire along with agreeing to certain other conditions. Under the Company’s definitions of retirement, some of its executive officers, including its Chief Executive Officer, and its Chairman are retirement eligible. Compensation Expense and Award Activity The following tables summarize compensation information regarding the restricted shares, restricted units, Options and Employee Share Purchase Plan (“ESPP”) for the three years ended December 31, 2021, 2020 and 2019. Year Ended December 31, 2021 Compensation Expense Compensation Capitalized Restricted Units/Options In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 7,258 $ 1,131 $ — $ 8,389 $ 761 Restricted units (2) 16,689 70 1,038 17,797 1,254 Options 2,980 121 — 3,101 — ESPP discount 883 108 — 991 — Total $ 27,810 $ 1,430 $ 1,038 $ 30,278 $ 2,015 Year Ended December 31, 2020 Compensation Expense Compensation Capitalized Restricted Units/Options In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 10,053 $ 1,172 $ — $ 11,225 $ 1,172 Restricted units (2) 10,103 80 1,743 11,926 1,855 Options 2,156 193 — 2,349 — ESPP discount 862 82 — 944 — Total $ 23,174 $ 1,527 $ 1,743 $ 26,444 $ 3,027 Year Ended December 31, 2019 Compensation Expense Compensation Capitalized Restricted Units/Options In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 11,522 $ 916 $ — $ 12,438 $ 979 Restricted units (2) 9,905 240 3,265 13,410 825 Options 2,420 254 1 2,675 — ESPP discount 602 40 — 642 — Total $ 24,449 $ 1,450 $ 3,266 $ 29,165 $ 1,804 (1) The Company allows eligible officers the ability to receive immediately vested restricted units (subject to the book-up provisions described above and a two-year hold restriction) or immediately vested Options in-lieu of any percentage of their annual cash bonus. (2) Includes LTI plan awards granted under the executive compensation program. Compensation expense is generally recognized for Awards as follows: • Restricted shares, restricted units and Options – Straight-line method over the vesting period of the Options, shares or units regardless of cliff or ratable vesting distinctions. • LTI plan awards – Target amount is recognized under the straight-line method over the vesting period of the shares or units. • ESPP discount – Immediately upon the purchase of Common Shares each quarter. The Company accelerates the recognition of compensation expense for all Awards for those individuals approaching or meeting the retirement age criteria discussed above. The total compensation expense related to Awards not yet vested at December 31, 2021 is $8.6 million (including the accelerated expenses for individuals approaching or meeting the retirement age criteria discussed above), which is expected to be recognized over a weighted average term of 1.37 years. The table below summarizes the Award activity of the Share Incentive Plans for the three years ended December 31, 2021, 2020 and 2019: Common Shares Subject to Options Weighted Average Exercise Price per Option Restricted Shares Weighted Average Fair Value per Restricted Share Restricted Units Weighted Average Fair Value per Restricted Unit Balance at December 31, 2018 7,112,235 $ 52.35 299,425 $ 66.52 1,139,848 $ 71.07 Awards granted (1) 234,147 $ 72.10 163,799 $ 73.96 141,772 $ 67.22 Awards exercised/vested (1,745,050 ) $ 44.72 (151,321 ) $ 75.41 (422,784 ) $ 70.77 Awards forfeited (30,489 ) $ 61.92 (5,197 ) $ 65.35 (552 ) $ 69.43 Awards expired (3,299 ) $ 40.39 — $ — — $ — Balance at December 31, 2019 5,567,544 $ 55.52 306,706 $ 66.15 858,284 $ 64.95 Awards granted (1) 317,731 $ 76.26 179,911 $ 77.44 249,263 $ 72.00 Awards exercised/vested (239,695 ) $ 50.31 (131,792 ) $ 66.32 (227,747 ) $ 68.47 Awards forfeited (1,344 ) $ 72.69 (1,191 ) $ 73.45 — $ — Awards expired (1,484 ) $ 47.18 — $ — — $ — Balance at December 31, 2020 5,642,752 $ 56.91 353,634 $ 71.81 879,800 $ 66.78 Awards granted (1) 489,853 $ 67.58 96,224 $ 70.46 190,742 $ 60.71 Awards exercised/vested (1,710,692 ) $ 50.09 (133,351 ) $ 62.89 (181,531 ) $ 62.01 Awards forfeited (23,317 ) $ 73.33 (6,631 ) $ 74.31 (35,580 ) $ 59.82 Awards expired (10,763 ) $ 68.00 — $ — — $ — Balance at December 31, 2021 4,387,833 $ 60.65 309,876 $ 75.17 853,431 $ 66.11 (1) Includes LTI plan awards granted under the executive compensation program. Amounts in thousands except per share amounts Year Ended December 31, 2021 2020 2019 Weighted average grant date fair value per share for Options granted $ 7.98 $ 6.74 $ 8.05 Aggregate intrinsic value of Options exercised (1) $ 47,413 $ 7,569 $ 58,066 Fair value of restricted shares vested $ 9,222 $ 10,559 $ 11,133 Fair value of restricted units vested $ 12,468 $ 18,711 $ 29,149 (1) These values were calculated as the difference between the strike price of the underlying awards and the per share price at which each respective award was exercised. The following table summarizes information regarding Options outstanding and exercisable at December 31, 2021 (aggregate intrinsic value is in thousands): Options Weighted Average Remaining Contractual Life in Years Weighted Average Exercise Price Aggregate Intrinsic Value (1) Options Outstanding 4,387,833 5.37 $ 60.65 $ 130,999 Options Exercisable 3,710,888 4.76 $ 58.70 $ 118,015 Vested and expected to vest 666,334 8.71 $ 71.33 $ 12,775 (1) The aggregate intrinsic values were calculated as the excess, if any, between the Company’s closing share price of $90.50 per share on December 31, 2021 and the strike price of the underlying awards. As of December 31, 2020 and 2019, 4,985,668 Options (with a weighted average exercise price of $55.12) and 4,750,481 Options (with a weighted average exercise price of $54.13) were exercisable, respectively.

Employee Plans

Employee Plans	12 Months Ended
	Dec. 31, 2021
Employee Service Share Based Compensation Aggregate Disclosures [Abstract]
Employee Plans	1 3 . Employee Plans The Company established an Employee Share Purchase Plan to provide each employee and trustee the ability to annually acquire up to $100,000 of Common Shares of EQR. The Company registered 7,000,000 Common Shares under the ESPP, of which 2,553,434 Common Shares remained available for purchase at December 31, 2021. The Common Shares may be purchased quarterly at a price equal to 85% of the lesser of: (a) the closing price for a share on the last day of such quarter; and (b) the greater of: (i) the closing price for a share on the first day of such quarter, and (ii) the average closing price for a share for all the business days in the quarter. The following table summarizes information regarding the Common Shares issued under the ESPP with the net proceeds noted below being contributed to ERPOP in exchange for OP Units (amounts in thousands except share and per share amounts): Year Ended December 31, 2021 2020 2019 Shares issued 70,702 90,196 48,131 Issuance price ranges $53.13 – $71.04 $46.23 – $63.84 $59.56 – $72.91 Issuance proceeds $ 4,265 $ 4,508 $ 3,116 The Company established a defined contribution plan (the “401(k) Plan”) to provide retirement benefits for employees that meet minimum employment criteria. The Company matches dollar for dollar up to the first 4% of eligible compensation that a participant contributes to the 401(k) Plan for all employees except those defined as highly compensated employees, whose match is 3%. Participants are vested in the Company’s contributions over five years. The Company recognized an expense in the amount of $4.9 million, $5.2 million and $5.0 million for the years ended December 31, 2021, 2020 and 2019, respectively. The Company established the SERP to provide certain officers and trustees an opportunity to defer a portion of their eligible compensation in order to save for retirement. The SERP is restricted to investments in Common Shares, certain marketable securities that have been specifically approved and cash equivalents. The deferred compensation liability represented in the SERP and the securities issued to fund such deferred compensation liability are consolidated by the Company and carried on the Company’s balance sheets, and the Company’s Common Shares held in the SERP are accounted for as a reduction to paid in capital (included in general partner’s capital in the Operating Partnership’s financial statements).

Distribution Reinvestment Plan

Distribution Reinvestment Plan	12 Months Ended
	Dec. 31, 2021
Distribution Reinvestment And Share Purchase Plan [Abstract]
Distribution Reinvestment Plan	1 4 . Distribution Reinvestment Plan On September 30, 2014, the Company filed with the SEC a Form S-3 Registration Statement to register 4,790,000 Common Shares pursuant to a Distribution Reinvestment Plan (the “2014 DRIP”), which included the remaining shares available for issuance under a previous registration. The registration was automatically declared effective the same day and will expire when all 4,790,000 shares have been issued. The Company has 4,640,684 Common Shares available for issuance under the 2014 DRIP at December 31, 2021. The 2014 DRIP provides holders of record and beneficial owners of Common Shares and Preferred Shares with a simple and convenient method of reinvesting cash dividends/distributions in additional Common Shares. Common Shares purchased under the 2014 DRIP may, at the option of EQR, be directly issued by EQR or purchased by EQR’s transfer agent in the open market using participants’ funds. The net proceeds from any Common Share issuances are contributed to ERPOP in exchange for OP Units.

Transactions with Related Parti

Transactions with Related Parties	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Transactions with Related Parties	1 5 . Transactions with Related Parties The Company leases its corporate headquarters from an entity affiliated with EQR’s Chairman of the Board of Trustees. The lease term expires on November 30, 2032 and contains two five-year extension options. The amount incurred for such office space for the years ended December 31, 2021, 2020 and 2019 were approximately $ million, $ million and $ million , respectively . The Company believes these amount s approximate market rates for such rental space .

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	1 6 . Commitments and Contingencies Commitments Joint Venture and Real Estate Technology Fund Commitments We have entered into, and may continue in the future to enter into, joint ventures agreements with third-party partners for the development of multifamily rental properties, as well as real estate technology fund investments. The joint venture agreements with each development partner include buy-sell provisions that provide the right, but not the obligation, for the Company to acquire each respective partner’s interests or sell its interests at any time following the occurrence of certain pre-defined events described in the joint venture agreements. See Note 6 for additional discussion. The following table summarizes the Company’s approximate real estate commitments at December 31, 2021 (amounts in thousands for remaining commitments): Remaining Projects/Investments Apartment Units Commitments Projects Under Development Consolidated 1 312 $ 83,720 Unconsolidated 3 929 264,290 Total Projects Under Development (1) 4 1,241 $ 348,010 Real Estate Technology Investments 9 — $ 30,947 (1) Remaining commitments for total projects under development represent the gross amounts, with funds to be provided by the Company, its joint venture partners and/or applicable construction loans. As of December 31, 2021, the Company entered into a commitment agreement (the “Commitment Agreement”) with Toll to pursue the joint development of multifamily rental properties. Over the next three years, the Company intends to invest 75% of the equity for each selected project and Toll intends to invest 25%. It is expected that each project will also be financed with approximately 60% non-recourse construction debt. The parties have targeted an initial minimum co-investment of approximately $750.0 million in combined equity. The Company and Toll will enter into separate joint venture agreements for each property, and the Company will account for these unconsolidated joint ventures under the equity method of accounting. As of December 31, 2021, the Company and Toll have entered into three separate joint venture agreements under the Commitment Agreement, with all three projects expected to start development in 2022. Employment Agreements The Company has entered into a retirement benefits agreement with its Chairman and a deferred compensation agreement with one former executive officer. During the years ended December 31, 2021, 2020 and 2019, the Company recognized compensation expense of $0.1 million, $0.5 million and $0.4 million, respectively, related to these agreements. The following table summarizes the Company’s contractual obligations for deferred compensation for the next five years and thereafter as of December 31, 2021: (Payments) Due by Year (in thousands) 2022 2023 2024 2025 2026 Thereafter Total Other Long-Term Liabilities: Deferred Compensation (1) $ (773 ) $ (1,013 ) $ (732 ) $ (732 ) $ (732 ) $ (4,023 ) $ (8,005 ) (1) Estimated payments to the Company’s Chairman and one former executive officer based on actual and estimated retirement dates. Contingencies Litigation and Legal Matters The Company, as an owner of real estate, is subject to various Federal, state and local laws, including, but not limited to, rent regulations and environmental laws. Compliance by the Company with existing laws has not had a material adverse effect on the Company. However, the Company cannot predict the impact of new or changed laws or regulations , whether related to COVID-19 or otherwise, on its current properties or on properties that it may acquire in the future. The Company does not believe there is any litigation pending or threatened against it that, individually or in the aggregate, may reasonably be expected to have a material adverse effect on the Company.

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Reportable Segments	1 7 . Reportable Segments Operating segments are defined as components of an enterprise that engage in business activities from which they may earn revenues and incur expenses and about which discrete financial information is available that is evaluated regularly by the chief operating decision maker. The chief operating decision maker decides how resources are allocated and assesses performance on a recurring basis at least quarterly. The Company’s primary business is the acquisition, development and management of multifamily residential properties, which includes the generation of rental and other related income through the leasing of apartment units to residents. The chief operating decision maker evaluates the Company’s operating performance geographically by market and both on a same store and non-same store basis. While the Company does maintain a non-residential presence, it accounts for approximately 3.9% of total revenues for the year ended December 31, 2021 and is designed as an amenity for our residential residents. The chief operating decision maker evaluates the performance of each property on a consolidated residential and non-residential basis. The Company’s geographic consolidated same store operating segments represent its reportable segments. The Company’s development activities are other business activities that do not constitute an operating segment and as such, have been aggregated in the “Other” category in the tables presented below. All revenues are from external customers and there is no customer who contributed 10% or more of the Company’s total revenues during the three years ended December 31, 2021, 2020 and 2019, respectively. The primary financial measure for the Company’s rental real estate segment is net operating income (“NOI”), which represents rental income less: 1) property and maintenance expense and 2) real estate taxes and insurance expense (all as reflected in the accompanying consolidated statements of operations and comprehensive income). The Company believes that NOI is helpful to investors as a supplemental measure of its operating performance because it is a direct measure of the actual operating results of the Company’s apartment properties. Revenues for all leases are reflected on a straight-line basis in accordance with GAAP for the current and comparable periods. The following table presents a reconciliation of NOI from our rental real estate for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): Year Ended December 31, 2021 2020 2019 Rental income $ 2,463,997 $ 2,571,705 $ 2,700,691 Property and maintenance expense (453,532 ) (440,998 ) (446,845 ) Real estate taxes and insurance expense (397,105 ) (381,562 ) (366,139 ) Total operating expenses (850,637 ) (822,560 ) (812,984 ) Net operating income $ 1,613,360 $ 1,749,145 $ 1,887,707 The following tables present NOI from our rental real estate for each segment for the years ended December 31, 2021, 2020 and 2019, respectively, as well as total assets and capital expenditures at December 31, 2021 and 2020, respectively (amounts in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Year Ended December 31, 2019 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 447,094 $ 141,636 $ 305,458 $ 444,129 $ 140,469 $ 303,660 $ 485,084 $ 144,314 $ 340,770 Orange County 109,427 24,986 84,441 105,236 24,545 80,691 105,087 24,359 80,728 San Diego 78,709 18,396 60,313 74,737 18,176 56,561 73,698 17,889 55,809 Subtotal - Southern California 635,230 185,018 450,212 624,102 183,190 440,912 663,869 186,562 477,307 San Francisco 391,022 121,134 269,888 435,371 117,085 318,286 473,102 115,702 357,400 Washington D.C. 393,374 130,445 262,929 405,571 125,353 280,218 394,171 119,419 274,752 New York 405,830 202,954 202,876 424,534 197,740 226,794 464,270 191,514 272,756 Seattle 245,484 77,537 167,947 257,372 74,362 183,010 252,311 68,717 183,594 Boston 232,233 75,698 156,535 240,158 71,611 168,547 253,297 70,875 182,422 Other Markets 39,084 11,209 27,875 37,917 11,040 26,877 18,215 4,713 13,502 Total same store 2,342,257 803,995 1,538,262 2,425,025 780,381 1,644,644 2,519,235 757,502 1,761,733 Non-same store/other (2) (3) Non-same store 51,604 21,296 30,308 11,791 2,706 9,085 58,751 17,702 41,049 Other (3) 70,136 25,346 44,790 134,889 39,473 95,416 122,705 37,780 84,925 Total non-same store/other 121,740 46,642 75,098 146,680 42,179 104,501 181,456 55,482 125,974 Totals $ 2,463,997 $ 850,637 $ 1,613,360 $ 2,571,705 $ 822,560 $ 1,749,145 $ 2,700,691 $ 812,984 $ 1,887,707 (1 ) For the years ended December 31, 2021 and 2020, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2020, less properties subsequently sold, which represented 74,077 apartment units. For the year ended December 31, 2019, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2019, less properties subsequently sold, which represented 73,585 apartment units. (2) For the years ended December 31, 2021 and 2020, non-same store primarily includes properties acquired after January 1, 2020, plus any properties in lease-up and not stabilized as of January 1, 2020. For the year ended December 31, 2019, non-same store primarily includes properties acquired after January 1, 2019, plus any properties in lease-up and not stabilized as of January 1, 2019. (3) Other includes development, other corporate operations and operations prior to disposition for properties sold. Year Ended December 31, 2021 Year Ended December 31, 2020 Total Assets Capital Expenditures Total Assets Capital Expenditures Same store (1) Los Angeles $ 2,792,948 $ 21,507 $ 2,905,404 $ 21,537 Orange County 371,063 5,647 389,007 7,260 San Diego 232,345 2,899 242,429 3,430 Subtotal - Southern California 3,396,356 30,053 3,536,840 32,227 San Francisco 3,195,089 22,416 3,310,083 18,091 Washington D.C. 3,177,162 27,148 3,291,760 23,637 New York 3,897,202 29,623 4,000,355 25,716 Seattle 1,958,145 15,038 2,023,183 11,621 Boston 1,694,432 21,095 1,758,665 18,367 Denver 492,454 2,015 512,131 1,579 Total same store 17,810,840 147,388 18,433,017 131,238 Non-same store/other (2) (3) Non-same store 2,512,611 1,704 671,216 73 Other (3) 845,790 1,927 1,182,658 4,668 Total non-same store/other 3,358,401 3,631 1,853,874 4,741 Totals $ 21,169,241 $ 151,019 $ 20,286,891 $ 135,979 (1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2020, less properties subsequently sold, which represented 74,077 apartment units. (2) Non-same store primarily includes properties acquired after January 1, 2020, plus any properties in lease-up and not stabilized as of January 1, 2020. (3) Other includes development, other corporate operations and capital expenditures for properties sold.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	1 8 . Subsequent Events Subsequent to December 31, 2021, the Company: • Acquired one property consisting of 172 apartment units for $113.0 million.

Schedule III - Real Estate and

Schedule III - Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2021
Real Estate And Accumulated Depreciation Disclosure [Abstract]
Schedule III-Real Estate and Accumulated Depreciation	EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation Overall Summary December 31, 2021 Properties Apartment Units Investment in Real Estate, Gross Accumulated Depreciation Investment in Real Estate, Net Encumbrances (1) Wholly Owned Unencumbered 256 67,748 $ 23,852,899,270 $ (7,039,743,046 ) $ 16,813,156,224 $ — Wholly Owned Encumbered 38 9,113 3,414,236,833 (1,014,105,838 ) 2,400,130,995 1,959,052,708 Wholly Owned Properties 294 76,861 27,267,136,103 (8,053,848,884 ) 19,213,287,219 1,959,052,708 Partially Owned Unencumbered 13 2,646 661,445,674 (217,880,998 ) 443,564,676 — Partially Owned Encumbered 3 900 344,324,608 (82,552,319 ) 261,772,289 232,148,309 Partially Owned Properties 16 3,546 1,005,770,282 (300,433,317 ) 705,336,965 232,148,309 Total Unencumbered Properties 269 70,394 24,514,344,944 (7,257,624,044 ) 17,256,720,900 — Total Encumbered Properties 41 10,013 3,758,561,441 (1,096,658,157 ) 2,661,903,284 2,191,201,017 Total Consolidated Investment in Real Estate 310 80,407 $ 28,272,906,385 $ (8,354,282,201 ) $ 19,918,624,184 $ 2,191,201,017 (1) See attached Encumbrances Reconciliation. EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation Encumbrances Reconciliation December 31, 2021 Portfolio/Entity Encumbrances Number of Properties Encumbered by See Properties With Note: Amount Archstone Master Property Holdings LLC (1) 12 H $ 799,153,560 Portfolio/Entity Encumbrances 12 799,153,560 Individual Property Encumbrances 1,392,047,457 Total Encumbrances per Financial Statements $ 2,191,201,017 (1) EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III – Real Estate and Accumulated Depreciation (Amounts in thousands) The changes in total real estate for the years ended December 31, 2021, 2020 and 2019 are as follows: 2021 2020 2019 Balance, beginning of year $ 27,203,325 $ 27,533,607 $ 26,511,022 Acquisitions and development 1,912,579 298,847 1,704,320 Improvements 152,715 154,433 180,944 Dispositions and other (995,713 ) (783,562 ) (862,679 ) Balance, end of year $ 28,272,906 $ 27,203,325 $ 27,533,607 The changes in accumulated depreciation for the years ended December 31, 2021, 2020 and 2019 are as follows: 2021 2020 2019 Balance, beginning of year $ 7,859,657 $ 7,276,786 $ 6,696,281 Depreciation 838,272 820,832 831,083 Dispositions and other (343,647 ) (237,961 ) (250,578 ) Balance, end of year $ 8,354,282 $ 7,859,657 $ 7,276,786 EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2021 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/21 Apartment Name Location Non-Residential Components Date of Construction Apartment Units Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/21 Encumbrances Wholly Owned Unencumbered: 100 K Apartments (fka 100K Street) Washington, D.C. — 2018 222 $ 15,600,000 $ 70,296,069 $ 80,503 $ 15,600,000 $ 70,376,572 $ 85,976,572 $ (9,006,912 ) $ 76,969,660 $ — 140 Riverside Boulevard New York, NY G 2003 354 103,539,100 94,082,725 11,259,577 103,539,100 105,342,302 208,881,402 (60,169,233 ) 148,712,169 — 160 Riverside Boulevard New York, NY G 2001 455 139,933,500 190,964,745 18,648,569 139,933,500 209,613,314 349,546,814 (119,792,673 ) 229,754,141 — 170 Amsterdam New York, NY G 2015 236 — 112,096,955 758,783 — 112,855,738 112,855,738 (29,560,885 ) 83,294,853 — 175 Kent Brooklyn, NY G 2011 113 22,037,831 53,962,169 2,645,841 22,037,831 56,608,010 78,645,841 (22,155,198 ) 56,490,643 — 180 Montague (fka Brooklyn Heights) Brooklyn, NY G 2000 193 32,400,000 92,675,228 5,658,812 32,400,000 98,334,040 130,734,040 (34,293,888 ) 96,440,152 — 180 Riverside Boulevard New York, NY G 1998 516 144,968,250 138,346,681 19,787,240 144,968,250 158,133,921 303,102,171 (89,675,680 ) 213,426,491 — 1210 Mass Washington, D.C. G 2004 144 9,213,512 36,559,189 4,143,076 9,213,512 40,702,265 49,915,777 (23,095,902 ) 26,819,875 — 1401 Joyce on Pentagon Row Arlington, VA — 2004 326 9,780,000 89,668,165 5,800,708 9,780,000 95,468,873 105,248,873 (44,718,792 ) 60,530,081 — 1500 Mass Ave Washington, D.C. G 1951 556 54,638,298 40,361,702 17,093,200 54,638,298 57,454,902 112,093,200 (33,979,290 ) 78,113,910 — 1800 Oak (fka Rosslyn) Arlington, VA G 2003 314 31,400,000 109,005,734 10,759,712 31,400,000 119,765,446 151,165,446 (42,105,522 ) 109,059,924 — 2201 Pershing Drive Arlington, VA G 2012 188 11,321,198 49,674,175 3,031,770 11,321,198 52,705,945 64,027,143 (19,161,188 ) 44,865,955 — 2201 Wilson Arlington, VA G 2000 219 21,900,000 78,724,663 6,665,866 21,900,000 85,390,529 107,290,529 (29,690,417 ) 77,600,112 — 2400 M St Washington, D.C. G 2006 359 30,006,593 114,013,785 4,972,552 30,006,593 118,986,337 148,992,930 (65,723,407 ) 83,269,523 — 315 on A Boston, MA G 2013 202 14,450,070 115,824,930 1,553,517 14,450,070 117,378,447 131,828,517 (31,402,367 ) 100,426,150 — 340 Fremont (fka Rincon Hill) San Francisco, CA — 2016 348 42,000,000 248,607,902 501,737 42,000,000 249,109,639 291,109,639 (52,713,886 ) 238,395,753 — 341 Nevins Brooklyn, NY — (F) — 3,621,717 299,143 — 3,621,717 299,143 3,920,860 — 3,920,860 — 3003 Van Ness (fka Van Ness) Washington, D.C. — 1970 625 56,300,000 141,191,580 9,574,525 56,300,000 150,766,105 207,066,105 (54,530,411 ) 152,535,694 — 425 Mass Washington, D.C. G 2009 559 28,150,000 138,600,000 6,876,074 28,150,000 145,476,074 173,626,074 (63,089,507 ) 110,536,567 — 455 Eye Street Washington, D.C. G 2017 174 11,941,407 61,418,689 133,247 11,941,407 61,551,936 73,493,343 (10,963,269 ) 62,530,074 — 4th and Hill Los Angeles, CA — (F) — 13,131,456 1,868,544 — 13,131,456 1,868,544 15,000,000 — 15,000,000 — 55 West Fifth I & II (fka Townhouse Plaza and Gardens) San Mateo, CA — 1964/1972 241 21,041,710 71,931,323 15,165,469 21,041,710 87,096,792 108,138,502 (36,196,476 ) 71,942,026 — 600 Washington New York, NY G 2004 135 32,852,000 43,140,551 3,632,257 32,852,000 46,772,808 79,624,808 (25,544,371 ) 54,080,437 — 660 Washington (fka Boston Common) Boston, MA G 2006 420 106,100,000 166,311,679 11,878,053 106,100,000 178,189,732 284,289,732 (59,198,371 ) 225,091,361 — 70 Greene Jersey City, NJ G 2010 480 28,108,899 236,763,553 4,657,362 28,108,899 241,420,915 269,529,814 (98,364,599 ) 171,165,215 — 71 Broadway New York, NY G 1997 238 22,611,600 77,492,171 20,626,142 22,611,600 98,118,313 120,729,913 (59,615,389 ) 61,114,524 — 77 Bluxome San Francisco, CA — 2007 102 5,249,124 18,609,876 604,943 5,249,124 19,214,819 24,463,943 (7,624,709 ) 16,839,234 — 77 Park Avenue (fka Hoboken) Hoboken, NJ G 2000 301 27,900,000 168,992,440 10,369,855 27,900,000 179,362,295 207,262,295 (60,865,749 ) 146,396,546 — 777 Sixth New York, NY G 2002 294 65,352,706 65,747,294 6,035,138 65,352,706 71,782,432 137,135,138 (35,483,508 ) 101,651,630 — 88 Hillside Daly City, CA G 2011 95 7,786,800 31,587,325 3,723,049 7,786,800 35,310,374 43,097,174 (14,208,098 ) 28,889,076 — 855 Brannan San Francisco, CA G 2018 449 41,363,921 282,738,324 420,418 41,363,921 283,158,742 324,522,663 (46,006,671 ) 278,515,992 — 929 Mass (fka 929 House) Cambridge, MA G 1975 127 3,252,993 21,745,595 8,984,103 3,252,993 30,729,698 33,982,691 (22,259,777 ) 11,722,914 — Academy Village North Hollywood, CA — 1989 248 25,000,000 23,593,194 11,983,148 25,000,000 35,576,342 60,576,342 (22,857,050 ) 37,719,292 — Acappella Pasadena, CA — 2002 143 5,839,548 29,360,452 2,459,547 5,839,548 31,819,999 37,659,547 (14,549,362 ) 23,110,185 — Alban Towers Washington, D.C. — 1934 229 18,900,000 89,794,201 7,420,013 18,900,000 97,214,214 116,114,214 (33,052,284 ) 83,061,930 — Alborada Fremont, CA — 1999 442 24,310,000 59,214,129 9,938,962 24,310,000 69,153,091 93,463,091 (49,918,901 ) 43,544,190 — Alcott Apartments (fka West End Tower) Boston, MA G 2021 470 10,424,000 387,714,090 36,889 10,424,000 387,750,979 398,174,979 (2,677,353 ) 395,497,626 — Altitude (fka Village at Howard Hughes, The (Lots 1 & 2)) Los Angeles, CA — 2016 545 43,783,485 150,234,305 678,439 43,783,485 150,912,744 194,696,229 (32,898,128 ) 161,798,101 — Alton, The (fka Millikan) Irvine, CA — 2017 344 11,049,027 96,523,928 322,646 11,049,027 96,846,574 107,895,601 (19,309,890 ) 88,585,711 — Arbor Terrace Sunnyvale, CA — 1979 175 9,057,300 18,483,642 12,379,831 9,057,300 30,863,473 39,920,773 (21,254,285 ) 18,666,488 — Arches, The Sunnyvale, CA — 1974 410 26,650,000 62,850,000 4,419,103 26,650,000 67,269,103 93,919,103 (29,273,217 ) 64,645,886 — Artisan on Second Los Angeles, CA — 2008 118 8,000,400 36,074,600 1,450,981 8,000,400 37,525,581 45,525,981 (15,416,946 ) 30,109,035 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2021 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/21 Apartment Name Location Non-Residential Components Date of Construction Apartment Units Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/21 Encumbrances Artistry Emeryville (fka Emeryville) Emeryville, CA — 1994 267 12,300,000 61,466,267 8,257,635 12,300,000 69,723,902 82,023,902 (26,696,773 ) 55,327,129 — Atelier Brooklyn, NY G 2015 120 32,401,680 47,135,432 681,890 32,401,680 47,817,322 80,219,002 (12,033,060 ) 68,185,942 — Avenue Two Redwood City, CA — 1972 123 7,995,000 18,005,000 2,841,937 7,995,000 20,846,937 28,841,937 (9,223,132 ) 19,618,805 — Axis at Shady Grove Rockville, MD — 2016 366 14,745,774 90,503,831 376,262 14,745,774 90,880,093 105,625,867 (15,555,350 ) 90,070,517 — Azure (fka Mission Bay-Block 13) San Francisco, CA — 2015 273 32,855,115 153,566,841 893,636 32,855,115 154,460,477 187,315,592 (36,744,242 ) 150,571,350 — Bay Hill Long Beach, CA — 2002 160 7,600,000 27,437,239 4,499,065 7,600,000 31,936,304 39,536,304 (19,233,962 ) 20,302,342 — Beatrice, The New York, NY — 2010 302 114,351,405 165,648,595 3,092,110 114,351,405 168,740,705 283,092,110 (62,467,433 ) 220,624,677 — Bella Vista I, II, III Combined Woodland Hills, CA — 2003-2007 579 31,682,754 121,095,786 11,565,891 31,682,754 132,661,677 164,344,431 (73,507,308 ) 90,837,123 — Belle Arts Condominium Homes, LLC Bellevue, WA — 2000 1 63,158 236,157 2,098 63,158 238,255 301,413 (108,223 ) 193,190 — Belle Fontaine Marina Del Rey, CA — 2003 102 9,098,808 28,701,192 2,487,041 9,098,808 31,188,233 40,287,041 (12,139,945 ) 28,147,096 — Breakwater at Marina Del Rey Marina Del Rey, CA — 1964-1969 224 — 73,189,262 2,593,029 — 75,782,291 75,782,291 (27,700,597 ) 48,081,694 — Briarwood (CA) Sunnyvale, CA — 1985 192 9,991,500 22,247,278 4,532,523 9,991,500 26,779,801 36,771,301 (21,134,083 ) 15,637,218 — Brodie, The Westminster, CO — 2016 312 8,639,904 79,256,940 947,949 8,639,904 80,204,889 88,844,793 (12,775,088 ) 76,069,705 — Brooklyner, The (fka 111 Lawrence) Brooklyn, NY G 2010 490 40,099,922 221,438,631 5,655,023 40,099,922 227,093,654 267,193,576 (85,848,149 ) 181,345,427 — C on Pico Los Angeles, CA — 2014 94 17,125,766 28,074,234 661,321 17,125,766 28,735,555 45,861,321 (7,175,224 ) 38,686,097 — Carlyle Mill Alexandria, VA — 2002 317 10,000,000 51,367,913 9,986,014 10,000,000 61,353,927 71,353,927 (39,619,406 ) 31,734,521 — Carmel Terrace San Diego, CA — 1988-1989 384 2,288,300 20,596,281 13,182,734 2,288,300 33,779,015 36,067,315 (30,571,076 ) 5,496,239 — Cascade Seattle, WA G 2017 477 23,751,564 149,456,311 145,743 23,751,564 149,602,054 173,353,618 (26,437,276 ) 146,916,342 — Centennial (fka Centennial Court & Centennial Tower) Seattle, WA G 1991/2001 408 9,700,000 70,080,378 15,453,455 9,700,000 85,533,833 95,233,833 (51,055,366 ) 44,178,467 — Centre Club Combined Ontario, CA — 1994 & 2002 412 7,436,000 33,014,789 10,252,175 7,436,000 43,266,964 50,702,964 (30,268,211 ) 20,434,753 — Chelsea Square Redmond, WA — 1991 113 3,397,100 9,289,074 3,146,126 3,397,100 12,435,200 15,832,300 (9,742,785 ) 6,089,515 — Chloe on Madison (fka 1401 E. Madison) Seattle, WA G 2019 137 10,401,958 53,807,106 32,014 10,401,958 53,839,120 64,241,078 (4,838,864 ) 59,402,214 — Chloe on Union (fka Chloe) Seattle, WA G 2010 117 14,835,571 39,359,650 2,970,001 14,835,571 42,329,651 57,165,222 (8,287,738 ) 48,877,484 — Church Corner Cambridge, MA G 1987 85 5,220,000 16,744,643 3,484,815 5,220,000 20,229,458 25,449,458 (12,559,847 ) 12,889,611 — Circa Fitzsimons Denver, CO — 2020 280 9,241,400 86,070,796 319,011 9,241,400 86,389,807 95,631,207 (4,153,312 ) 91,477,895 — City Gate at Cupertino (fka Cupertino) Cupertino, CA — 1998 311 40,400,000 95,937,046 7,939,273 40,400,000 103,876,319 144,276,319 (37,159,709 ) 107,116,610 — City Square Bellevue (fka Bellevue) Bellevue, WA G 1998 191 15,100,000 41,876,257 4,017,150 15,100,000 45,893,407 60,993,407 (16,856,049 ) 44,137,358 — Clarendon, The Arlington, VA G 2005 292 30,400,340 103,824,660 2,937,604 30,400,340 106,762,264 137,162,604 (43,908,001 ) 93,254,603 — Cleo, The Los Angeles, CA — 1989 92 6,615,467 14,829,335 4,392,656 6,615,467 19,221,991 25,837,458 (10,957,338 ) 14,880,120 — Connecticut Heights Washington, D.C. — 1974 518 27,600,000 114,002,295 11,168,810 27,600,000 125,171,105 152,771,105 (43,749,160 ) 109,021,945 — Corcoran House at DuPont Circle (fka DuPont Circle) Washington, D.C. G 1961 138 13,500,000 26,913,113 4,679,308 13,500,000 31,592,421 45,092,421 (11,417,114 ) 33,675,307 — Courthouse Plaza Arlington, VA G 1990 396 — 87,386,024 7,944,020 — 95,330,044 95,330,044 (35,422,571 ) 59,907,473 — Creekside (San Mateo) San Mateo, CA — 1985 192 9,606,600 21,193,232 5,859,790 9,606,600 27,053,022 36,659,622 (21,045,859 ) 15,613,763 — Cronins Landing Waltham, MA G 1998 281 32,300,000 85,119,324 14,041,974 32,300,000 99,161,298 131,461,298 (35,545,036 ) 95,916,262 — Crystal Place Arlington, VA — 1986 181 17,200,000 47,918,975 4,182,311 17,200,000 52,101,286 69,301,286 (19,499,819 ) 49,801,467 — Dalton, The Alexandria, VA G 2018 270 22,947,777 95,334,754 144,951 22,947,777 95,479,705 118,427,482 (10,821,659 ) 107,605,823 — Deerwood (SD) San Diego, CA — 1990 316 2,082,095 18,739,815 17,201,750 2,082,095 35,941,565 38,023,660 (32,390,313 ) 5,633,347 — Del Mar Ridge San Diego, CA — 1998 181 7,801,824 36,948,176 4,673,335 7,801,824 41,621,511 49,423,335 (20,504,751 ) 28,918,584 — Eagle Canyon Chino Hills, CA — 1985 252 1,808,900 16,274,361 11,895,689 1,808,900 28,170,050 29,978,950 (23,146,239 ) 6,832,711 — Edge, The (fka 4885 Edgemoor Lane) Bethesda, MD — 2021 154 — 73,090,698 — — 73,090,698 73,090,698 (1,337,668 ) 71,753,030 — Edgemont at Bethesda Metro Bethesda, MD — 1989 122 13,092,552 43,907,448 3,598,672 13,092,552 47,506,120 60,598,672 (18,431,823 ) 42,166,849 — Emerson Place Boston, MA G 1962 444 14,855,000 57,566,636 37,319,848 14,855,000 94,886,484 109,741,484 (72,262,761 ) 37,478,723 — Encore at Sherman Oaks, The Sherman Oaks, CA — 1988 174 8,700,000 25,446,003 4,699,461 8,700,000 30,145,464 38,845,464 (13,117,331 ) 25,728,133 — Eviva on Cherokee Denver, CO — 2017 274 10,507,626 100,037,204 928,435 10,507,626 100,965,639 111,473,265 (14,488,506 ) 96,984,759 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2021 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/21 Apartment Name Location Non-Residential Components Date of Construction Apartment Units Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/21 Encumbrances Flora Austin, TX — 2019 194 5,733,088 32,341,897 33,274 5,733,088 32,375,171 38,108,259 (2,351,033 ) 35,757,226 — Fremont Center Fremont, CA G 2002 322 25,800,000 78,753,114 5,432,484 25,800,000 84,185,598 109,985,598 (30,713,571 ) 79,272,027 — Gaithersburg Station Gaithersburg, MD G 2013 400 17,500,000 74,678,917 4,910,339 17,500,000 79,589,256 97,089,256 (26,550,891 ) 70,538,365 — Gateway at Malden Center Malden, MA G 1988 203 9,209,780 25,722,666 18,179,307 9,209,780 43,901,973 53,111,753 (30,509,820 ) 22,601,933 — Geary Court Yard San Francisco, CA — 1990 165 1,722,400 15,471,429 6,418,695 1,722,400 21,890,124 23,612,524 (17,437,666 ) 6,174,858 — Girard Boston, MA G 2016 160 — 102,450,328 987,940 — 103,438,268 103,438,268 (18,672,977 ) 84,765,291 — Hampshire Place Los Angeles, CA — 1989 259 10,806,000 30,335,330 9,226,550 10,806,000 39,561,880 50,367,880 (23,198,296 ) 27,169,584 — Harbor Steps Seattle, WA G 2000 761 59,403,601 158,829,432 44,513,593 59,403,601 203,343,025 262,746,626 (114,985,651 ) 147,760,975 — Hathaway Long Beach, CA — 1987 385 2,512,500 22,611,912 15,153,674 2,512,500 37,765,586 40,278,086 (30,134,333 ) 10,143,753 — Helios (fka 2nd+Pine) Seattle, WA G 2017 398 18,061,674 206,766,901 312,408 18,061,674 207,079,309 225,140,983 (36,567,089 ) 188,573,894 — Heritage at Stone Ridge Burlington, MA — 2005 180 10,800,000 31,808,335 3,752,471 10,800,000 35,560,806 46,360,806 (20,282,031 ) 26,078,775 — Heritage Ridge Lynwood, WA — 1999 197 6,895,000 18,983,597 4,870,503 6,895,000 23,854,100 30,749,100 (13,956,897 ) 16,792,203 — Hesby North Hollywood, CA — 2013 308 23,299,892 102,700,108 2,729,069 23,299,892 105,429,177 128,729,069 (32,170,802 ) 96,558,267 — Highlands at South Plainfield South Plainfield, NJ — 2000 252 10,080,000 37,526,912 3,230,733 10,080,000 40,757,645 50,837,645 (23,217,224 ) 27,620,421 — Hikari Los Angeles, CA G 2007 128 9,435,760 32,564,240 1,453,552 9,435,760 34,017,792 43,453,552 (13,835,502 ) 29,618,050 — Hudson Crossing New York, NY G 2003 259 23,420,000 69,977,699 3,571,165 23,420,000 73,548,864 96,968,864 (43,605,553 ) 53,363,311 — Hudson Pointe Jersey City, NJ — 2003 182 5,350,000 41,114,074 8,229,014 5,350,000 49,343,088 54,693,088 (30,026,653 ) 24,666,435 — Huxley, The Redwood City, CA — 2018 137 18,775,028 89,336,651 105,265 18,775,028 89,441,916 108,216,944 (10,326,938 ) 97,890,006 — Indie Deep Ellum Dallas, TX G 2020 231 12,253,503 63,844,734 35,414 12,253,503 63,880,148 76,133,651 (2,577,427 ) 73,556,224 — Ivory Wood Bothell, WA — 2000 144 2,732,800 13,888,282 2,742,943 2,732,800 16,631,225 19,364,025 (9,766,422 ) 9,597,603 — Jia (fka Chinatown Gateway) Los Angeles, CA G 2014 280 14,791,831 78,286,423 1,142,453 14,791,831 79,428,876 94,220,707 (27,653,136 ) 66,567,571 — Junction 47 (fka West Seattle) Seattle, WA G 2015 206 11,726,305 56,584,312 376,513 11,726,305 56,960,825 68,687,130 (14,552,334 ) 54,134,796 — Juniper Sandy Springs Sandy Springs, GA — 2017 230 8,668,700 64,965,193 17,829 8,668,700 64,983,022 73,651,722 (622,903 ) 73,028,819 — Kelvin, The (fka Modera) Irvine, CA — 2015 194 15,521,552 64,853,448 908,796 15,521,552 65,762,244 81,283,796 (17,678,084 ) 63,605,712 — Kilby Frisco, TX — 2020 258 6,431,940 64,175,461 19,960 6,431,940 64,195,421 70,627,361 (3,264,959 ) 67,362,402 — Laguna Clara Santa Clara, CA — 1972 264 13,642,420 28,684,902 9,733,754 13,642,420 38,418,656 52,061,076 (22,548,251 ) 29,512,825 — Laguna Clara II Santa Clara, CA — (F) — — 4,399,463 — — 4,399,463 4,399,463 — 4,399,463 — Landings at Port Imperial W. New York, NJ — 1999 276 27,246,045 37,741,050 16,597,064 27,246,045 54,338,114 81,584,159 (37,633,786 ) 43,950,373 — Lane Seattle, WA G 2019 217 13,142,946 71,939,706 125,613 13,142,946 72,065,319 85,208,265 (7,428,489 ) 77,779,776 — Lex, The San Jose, CA — 2017 387 21,817,512 158,778,598 664,071 21,817,512 159,442,669 181,260,181 (21,065,903 ) 160,194,278 — Liberty Park Braintree, MA — 2000 202 5,977,504 26,749,111 8,235,368 5,977,504 34,984,479 40,961,983 (22,906,485 ) 18,055,498 — Liberty Tower Arlington, VA G 2008 235 16,382,822 83,817,078 6,030,560 16,382,822 89,847,638 106,230,460 (38,101,851 ) 68,128,609 — Lincoln Heights Quincy, MA — 1991 336 5,928,400 33,595,262 16,212,156 5,928,400 49,807,418 55,735,818 (41,040,115 ) 14,695,703 — Lofts at Kendall Square (fka Kendall Square) Cambridge, MA — 1998 186 18,696,674 78,445,657 7,812,849 18,696,674 86,258,506 104,955,180 (31,085,417 ) 73,869,763 — Lofts at Kendall Square ll (fka 249 Third Street) Cambridge, MA G 2019 84 4,603,326 44,012,266 33,164 4,603,326 44,045,430 48,648,756 (3,879,191 ) 44,769,565 — Longacre House New York, NY G 2000 293 73,170,045 53,962,510 6,230,046 73,170,045 60,192,556 133,362,601 (30,329,437 ) 103,033,164 — Longfellow Place Boston, MA G 1975 710 38,264,917 132,175,915 94,971,924 38,264,917 227,147,839 265,412,756 (173,153,336 ) 92,259,420 — Luna Upper Westside Atlanta, GA — 2020 345 14,847,420 108,292,639 21,884 14,847,420 108,314,523 123,161,943 (3,339,114 ) 119,822,829 — Madox Jersey City, NJ G 2013 131 9,679,635 64,594,205 1,254,672 9,679,635 65,848,877 75,528,512 (10,085,214 ) 65,443,298 — Mantena New York, NY G 2012 98 22,346,513 61,501,158 1,761,788 22,346,513 63,262,946 85,609,459 (22,271,078 ) 63,338,381 — Marina 41 (fka Marina Del Rey) Marina Del Rey, CA — 1973 623 — 168,842,442 10,015,523 — 178,857,965 178,857,965 (65,825,369 ) 113,032,596 — Mariposa at Playa Del Rey (fka Playa Del Rey) Playa Del Rey, CA — 2004 354 60,900,000 89,311,482 7,365,735 60,900,000 96,677,217 157,577,217 (35,254,658 ) 122,322,559 — Mark on 8th Seattle, WA G 2016 174 23,004,387 51,116,647 342,085 23,004,387 51,458,732 74,463,119 (9,185,494 ) 65,277,625 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2021 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/21 Apartment Name Location Non-Residential Components Date of Construction Apartment Units Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/21 Encumbrances Market Street Village San Diego, CA — 2006 229 13,740,000 40,757,301 2,797,175 13,740,000 43,554,476 57,294,476 (24,031,830 ) 33,262,646 — Marlowe (fka Oakwood Crystal City) Arlington, VA — 1987 162 15,400,000 35,474,336 4,757,690 15,400,000 40,232,026 55,632,026 (14,954,232 ) 40,677,794 — Milano Lofts Los Angeles, CA G 1925/2006 99 8,125,216 27,378,784 4,530,389 8,125,216 31,909,173 40,034,389 (11,851,749 ) 28,182,640 — Mill Creek Milpitas, CA — 1991 516 12,858,693 57,168,503 18,798,964 12,858,693 75,967,467 88,826,160 (46,782,863 ) 42,043,297 — Milo Denver, CO — 2020 319 15,957,975 153,099,656 — 15,957,975 153,099,656 169,057,631 — 169,057,631 — Mosaic at Metro Hyattsville, MD — 2008 260 — 59,580,898 1,837,346 — 61,418,244 61,418,244 (27,876,865 ) 33,541,379 — Mountain View Redevelopment Mountain View, CA — (F) — — 2,166,909 — — 2,166,909 2,166,909 — 2,166,909 — Mozaic at Union Station Los Angeles, CA — 2007 272 8,500,000 52,529,446 2,930,062 8,500,000 55,459,508 63,959,508 (29,803,888 ) 34,155,620 — Murray Hill Tower (fka Murray Hill) New York, NY G 1974 270 75,800,000 102,705,401 13,129,682 75,800,000 115,835,083 191,635,083 (43,363,080 ) 148,272,003 — Next on Sixth Los Angeles, CA G 2017 398 52,509,906 136,635,650 605,836 52,509,906 137,241,486 189,751,392 (18,715,038 ) 171,036,354 — North Pier at Harborside Jersey City, NJ — 2003 297 4,000,159 94,290,590 10,474,470 4,000,159 104,765,060 108,765,219 (61,029,617 ) 47,735,602 — Northglen Valencia, CA — 1988 234 9,360,000 20,778,553 7,516,774 9,360,000 28,295,327 37,655,327 (19,023,647 ) 18,631,680 — Northpark Burlingame, CA — 1972 510 38,607,000 77,472,217 16,819,921 38,607,000 94,292,138 132,899,138 (47,487,541 ) 85,411,597 — Oak Park Combined Agoura Hills, CA — 1989 & 1990 444 3,390,700 30,517,274 12,111,379 3,390,700 42,628,653 46,019,353 (36,862,704 ) 9,156,649 — Oaks Santa Clarita, CA — 2000 520 23,400,000 61,020,438 10,122,280 23,400,000 71,142,718 94,542,718 (44,090,629 ) 50,452,089 — Ocean Crest Solana Beach, CA — 1986 146 5,111,200 11,910,438 5,268,993 5,111,200 17,179,431 22,290,631 (13,263,918 ) 9,026,713 — Odin (fka Tallman) Seattle, WA — 2015 301 16,807,519 64,519,515 170,392 16,807,519 64,689,907 81,497,426 (16,311,212 ) 65,186,214 — Olivian at the Realm Lewisville, TX — 2021 421 14,854,564 109,261,221 — 14,854,564 109,261,221 124,115,785 — 124,115,785 — One Henry Adams San Francisco, CA G 2016 241 30,224,393 139,604,146 242,340 30,224,393 139,846,486 170,070,879 (28,006,849 ) 142,064,030 — One India Street (fka Oakwood Boston) Boston, MA G 1901 94 22,200,000 28,672,979 7,088,089 22,200,000 35,761,068 57,961,068 (13,161,555 ) 44,799,513 — Osprey Atlanta, GA G 2020 320 18,121,932 116,942,248 9,397 18,121,932 116,951,645 135,073,577 (4,243,648 ) 130,829,929 — Pacific Place Los Angeles, CA — 2008 430 32,250,000 110,750,000 2,377,323 32,250,000 113,127,323 145,377,323 (38,719,361 ) 106,657,962 — Packard Building Seattle, WA G 2010 61 5,911,041 19,954,959 1,289,877 5,911,041 21,244,836 27,155,877 (5,677,314 ) 21,478,563 — Parc 77 New York, NY G 1903 137 40,504,000 18,025,679 7,360,941 40,504,000 25,386,620 65,890,620 (15,823,387 ) 50,067,233 — Parc Cameron New York, NY G 1927 166 37,600,000 9,855,597 7,969,567 37,600,000 17,825,164 55,425,164 (12,804,109 ) 42,621,055 — Parc Coliseum New York, NY G 1910 177 52,654,000 23,045,751 10,151,472 52,654,000 33,197,223 85,851,223 (21,315,552 ) 64,535,671 — Parc East Towers New York, NY G 1977 324 102,163,000 108,989,402 13,975,990 102,163,000 122,965,392 225,128,392 (65,431,630 ) 159,696,762 — Parc on Powell (fka Parkside at Emeryville) Emeryville, CA G 2015 173 16,667,059 65,468,571 894,344 16,667,059 66,362,915 83,029,974 (17,329,432 ) 65,700,542 — Park Connecticut Washington, D.C. — 2000 142 13,700,000 59,087,519 2,901,025 13,700,000 61,988,544 75,688,544 (20,895,182 ) 54,793,362 — Park West (CA) Los Angeles, CA — 1987/1990 444 3,033,500 27,302,383 13,432,822 3,033,500 40,735,205 43,768,705 (34,282,511 ) 9,486,194 — Parkside Union City, CA — 1979 208 6,246,700 11,827,453 8,549,823 6,246,700 20,377,276 26,623,976 (15,097,028 ) 11,526,948 — Pearl, The (WA) Seattle, WA G 2008 80 6,972,585 26,527,415 1,256,823 6,972,585 27,784,238 34,756,823 (7,499,036 ) 27,257,787 — Pearl MDR (fka Oakwood Marina Del Rey) Marina Del Rey, CA G 1969 597 — 120,795,359 7,187,274 — 127,982,633 127,982,633 (48,509,088 ) 79,473,545 — Pegasus Los Angeles, CA G 1949/2003 322 18,094,052 81,905,948 8,565,146 18,094,052 90,471,094 108,565,146 (38,970,462 ) 69,594,684 — Portofino Chino Hills, CA — 1989 176 3,572,400 14,660,994 4,142,052 3,572,400 18,803,046 22,375,446 (15,501,829 ) 6,873,617 — Portofino (Val) Valencia, CA — 1989 216 8,640,000 21,487,126 6,691,443 8,640,000 28,178,569 36,818,569 (19,742,885 ) 17,075,684 — Portside Towers Jersey City, NJ G 1992-1997 527 22,487,006 96,842,913 28,946,965 22,487,006 125,789,878 148,276,884 (98,609,366 ) 49,667,518 — Potrero 1010 San Francisco, CA G 2016 453 40,830,011 181,924,463 1,453,552 40,830,011 183,378,015 224,208,026 (41,306,612 ) 182,901,414 — Prado (fka Glendale) Glendale, CA — 1988 264 — 67,977,313 6,891,346 — 74,868,659 74,868,659 (26,817,073 ) 48,051,586 — Prime, The Arlington, VA — 2002 281 34,625,000 77,879,740 6,109,136 34,625,000 83,988,876 118,613,876 (38,545,149 ) 80,068,727 — Prism at Park Avenue South (fka 400 Park Avenue South) New York, NY G 2015 269 76,292,169 171,771,886 247,225 76,292,169 172,019,111 248,311,280 (45,640,216 ) 202,671,064 — Promenade at Town Center I & II Valencia, CA — 2001 564 28,200,000 69,795,915 15,138,641 28,200,000 84,934,556 113,134,556 (50,812,260 ) 62,322,296 — Providence Bothell, WA — 2000 200 3,573,621 19,055,505 5,727,670 3,573,621 24,783,175 28,356,796 (14,191,409 ) 14,165,387 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2021 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/21 Apartment Name Location Non-Residential Components Date of Construction Apartment Units Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/21 Encumbrances Quarry Hills Quincy, MA — 2006 316 26,900,000 84,411,162 5,214,690 26,900,000 89,625,852 116,525,852 (32,044,955 ) 84,480,897 — Radiant Fairfax Ridge Fairfax, VA — 2016 213 7,352,547 63,018,744 130,731 7,352,547 63,149,475 70,502,022 (3,775,097 ) 66,726,925 — Radius Uptown Denver, CO — 2017 372 13,644,960 121,899,084 1,896,784 13,644,960 123,795,868 137,440,828 (19,855,000 ) 117,585,828 — Red 160 (fka Redmond Way) Redmond, WA G 2011 250 15,546,376 65,320,010 1,795,106 15,546,376 67,115,116 82,661,492 (25,272,790 ) 57,388,702 — Redmond Court Bellevue, WA — 1977 206 10,300,000 33,488,745 3,730,013 10,300,000 37,218,758 47,518,758 (14,009,343 ) 33,509,415 — Regency Palms Huntington Beach, CA — 1969 310 1,857,400 16,713,254 8,707,710 1,857,400 25,420,964 27,278,364 (20,984,954 ) 6,293,410 — Reserve at Burlington, The Burlington, MA — 2019 270 20,250,000 114,475,523 101,854 20,250,000 114,577,377 134,827,377 (5,817,645 ) 129,009,732 — Reserve at Clarendon Centre, The Arlington, VA G 2003 252 10,500,000 52,812,935 5,327,794 10,500,000 58,140,729 68,640,729 (36,876,197 ) 31,764,532 — Reserve at Eisenhower, The Alexandria, VA — 2002 226 6,500,000 34,585,059 5,515,216 6,500,000 40,100,275 46,600,275 (25,376,674 ) 21,223,601 — Reserve at Empire Lakes Rancho Cucamonga, CA — 2005 467 16,345,000 73,080,670 8,210,962 16,345,000 81,291,632 97,636,632 (44,759,994 ) 52,876,638 — Reserve at Fairfax Corner Fairfax, VA — 2001 652 15,804,057 63,129,050 13,867,418 15,804,057 76,996,468 92,800,525 (50,742,107 ) 42,058,418 — Reserve at Mountain View (fka Mountain View) Mountain View, CA — 1965 180 27,000,000 33,029,605 8,523,900 27,000,000 41,553,505 68,553,505 (16,598,937 ) 51,954,568 — Reserve at Potomac Yard Alexandria, VA — 2002 588 11,918,917 68,862,641 19,250,823 11,918,917 88,113,464 100,032,381 (53,684,381 ) 46,348,000 — Reserve at Town Center I-III (WA) Mill Creek, WA G 2001, 2009, 2014 584 16,768,705 77,623,664 11,315,691 16,768,705 88,939,355 105,708,060 (43,366,666 ) 62,341,394 — Rianna I & II Seattle, WA G 2000/2002 156 4,430,000 29,298,096 1,975,735 4,430,000 31,273,831 35,703,831 (14,608,457 ) 21,095,374 — Ridgewood Village I&II San Diego, CA — 1997 408 11,809,500 34,004,048 7,140,439 11,809,500 41,144,487 52,953,987 (30,998,875 ) 21,955,112 — Riva Terra I (fka Redwood Shores) Redwood City, CA — 1986 304 34,963,355 84,587,658 8,421,032 34,963,355 93,008,690 127,972,045 (35,095,846 ) 92,876,199 — Riva Terra II (fka Harborside) Redwood City, CA — 1986 149 17,136,645 40,536,531 4,141,820 17,136,645 44,678,351 61,814,996 (15,663,545 ) 46,151,451 — Riverpark Redmond, WA G 2009 321 14,355,000 80,894,049 5,143,443 14,355,000 86,037,492 100,392,492 (33,609,905 ) 66,782,587 — Rivington, The Hoboken, NJ — 1999 240 34,340,640 112,112,152 4,260,470 34,340,640 116,372,622 150,713,262 (20,226,305 ) 130,486,957 — Rivington II, The Hoboken, NJ — (F) — — 736,622 — — 736,622 736,622 — 736,622 — Rosecliff II Quincy, MA — 2005 130 4,922,840 30,202,160 2,042,877 4,922,840 32,245,037 37,167,877 (13,320,307 ) 23,847,570 — Sakura Crossing Los Angeles, CA G 2009 230 14,641,990 42,858,010 1,646,714 14,641,990 44,504,724 59,146,714 (19,007,871 ) 40,138,843 — Saxton Seattle, WA G 2019 325 38,805,400 128,652,023 474,368 38,805,400 129,126,391 167,931,791 (14,473,592 ) 153,458,199 — Seventh & James Seattle, WA G 1992 96 663,800 5,974,803 4,681,230 663,800 10,656,033 11,319,833 (8,984,088 ) 2,335,745 — Sheffield Court Arlington, VA — 1986 597 3,342,381 31,337,332 21,942,021 3,342,381 53,279,353 56,621,734 (43,912,782 ) 12,708,952 — Siena Terrace Lake Forest, CA — 1988 356 8,900,000 24,083,024 8,984,059 8,900,000 33,067,083 41,967,083 (25,390,768 ) 16,576,315 — Skycrest Valencia, CA — 1999 264 10,560,000 25,574,457 6,723,207 10,560,000 32,297,664 42,857,664 (22,365,804 ) 20,491,860 — Skyhouse South Atlanta, GA G 2014 320 14,182,277 101,913,422 158,435 14,182,277 102,071,857 116,254,134 (5,725,734 ) 110,528,400 — Skylark Union City, CA — 1986 174 1,781,600 16,731,916 5,805,074 1,781,600 22,536,990 24,318,590 (17,322,154 ) 6,996,436 — Skyview Rancho Santa Margarita, CA — 1999 260 3,380,000 21,952,863 6,350,413 3,380,000 28,303,276 31,683,276 (21,352,684 ) 10,330,592 — SoMa II San Francisco, CA — (F) — 29,406,606 5,919,806 — 29,406,606 5,919,806 35,326,412 — 3

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Summary Of Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Due to the Company’s ability as general partner to control either through ownership or by contract the Operating Partnership and its subsidiaries, the Operating Partnership and each such subsidiary has been consolidated with the Company for financial reporting purposes, except for any unconsolidated properties/entities.
Real Estate Assets And Depreciation Of Investment In Real Estate	Real Estate Assets and Depreciation of Investment in Real Estate The Company expects that substantially all of its acquisitions will be accounted for as asset acquisitions. In an asset acquisition, the Company is required to capitalize transaction costs and allocate the purchase price on a relative fair value basis (including any identified intangible assets). For the years ended December 31, 2021 and 2020, all acquisitions were considered asset acquisitions. In making estimates of relative fair values for purposes of allocating purchase price, the Company utilizes a number of sources, including independent appraisals that may be obtained in connection with the acquisition or financing of the respective property, our own analysis of recently acquired or developed and existing comparable properties in our portfolio and other market data. The Company also considers information obtained about each property as a result of its pre-acquisition due diligence, marketing and leasing activities in estimating the relative fair value of the tangible and intangible assets/liabilities acquired. The Company allocates the purchase price of acquired real estate to various components as follows: • Land – Based on actual purchase price adjusted to an allocation of the relative fair value (as necessary) if acquired separately or market research/comparables if acquired with an operating property. • Furniture, Fixtures and Equipment – Based on an estimate of the allocation of the relative fair value of the appliances and fixtures inside an apartment unit. The per-apartment unit amount applied depends on the economic age of the apartment units acquired. Depreciation is calculated on the straight-line method over an estimated useful life of five to ten years. • Lease Intangibles – The Company considers the value of acquired in-place leases and above/below market leases and the amortization period is the average remaining term of each respective acquired lease. In-place residential leases’ average term at acquisition approximates six months. In-place non-residential leases’ term at acquisition approximates the average remaining term of all acquired non-residential leases. • Other Intangible Assets – The Company considers whether it has acquired other intangible assets, including any customer relationship intangibles and the amortization period is the estimated useful life of the acquired intangible asset. • Building – Based on the allocation of the relative fair value determined on an “as-if vacant” basis. Depreciation is calculated on the straight-line method over an estimated useful life of thirty years. • Long-Term Debt – The Company calculates the allocation of the relative fair value by discounting the remaining contractual cash flows on each instrument at the current market rate for those borrowings. Replacements inside an apartment unit such as appliances and carpeting are depreciated over an estimated useful life of five to ten years. Expenditures for ordinary maintenance and repairs are expensed to operations as incurred and significant renovations and improvements that improve and/or extend the useful life of the asset are capitalized over their estimated useful life, generally five to fifteen years. Initial direct leasing costs are expensed as incurred as such expense approximates the deferral and amortization of initial direct leasing costs over the lease terms. Property dispositions are recorded when control transfers to unrelated third parties, contingencies have been removed and sufficient cash consideration has been received by the Company. Upon disposition, the related costs and accumulated depreciation are removed from the respective accounts. Any gain or loss on sale is recognized in accordance with accounting principles generally accepted in the United States. The Company classifies real estate assets as real estate held for sale when it is probable a property will be disposed of. The Company classifies properties under development and/or expansion and properties in the lease-up phase (including land) as construction-in-progress until construction has been completed and certificates of occupancy permits have been obtained.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets At least quarterly, the Company evaluates its long-lived assets, including its investment in real estate, for indicators of impairment. The judgments regarding the existence of impairment indicators are based on factors such as operational performance, market conditions, legal, regulatory and environmental concerns, the Company’s intent and ability to hold the related asset, as well as any significant cost overruns on development properties. Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted. If an impairment indicator exists, the Company performs the following: • For long-lived operating assets to be held and used, the Company compares the expected future undiscounted cash flows for the long-lived asset against the carrying amount of that asset. If the sum of the estimated undiscounted cash flows is less than the carrying amount of the asset, the Company would make an estimate of the fair value for the particular asset and would record an impairment loss for the difference between the estimated fair value and the carrying amount of the asset. In determining the future undiscounted cash flows or the estimated fair value of an asset there is judgment in estimating the expected future rental revenues, operating expenses and discount and capitalization rates. • For long-lived non-operating assets (projects under development and land held for development), management evaluates major cost overruns, market conditions that could affect lease-up projections, intent and ability to hold the asset, and any other indicators of impairment. If any of the indicators were to suggest impairment was present, a recoverability analysis would be performed and the carrying value of the asset would be adjusted accordingly to fair value. • For long-lived assets to be disposed of, an impairment loss is recognized when the estimated fair value of the asset, less the estimated cost to sell, is less than the carrying amount of the asset measured at the time that the Company has determined it will sell the asset. Long-lived assets held for sale and the related liabilities are separately reported, with the long-lived assets reported at the lower of their carrying amounts or their estimated fair values, less their costs to sell, and are not depreciated after reclassification to real estate held for sale. See Note 4 for further discussion of the Company’s impairment charge on a land parcel in 2021.
Impairment of Investments in Unconsolidated Entities	Impairment of Investments in Unconsolidated Entities At least quarterly, the Company evaluates its investments in unconsolidated entities, including any multifamily real estate assets held by a joint venture, for indicators of other than temporary impairment, considering whether there has been a change to events or circumstances that would impact recoverability of the Company’s investment as well as any changes with regards to the Company's intent and ability to hold the investment to recover its carrying value.
Cost Capitalization	Cost Capitalization See the Real Estate Assets and Depreciation of Investment in Real Estate During the years ended December 31, 2021 and 2020, the Company capitalized $13.9 million and $12.1 million, respectively, of payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of development activities as well as major capital and/or renovation projects.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all demand deposits, money market accounts and investments in certificates of deposit with a maturity of three months or less at the date of purchase to be cash equivalents. The Company maintains its cash and cash equivalents at financial institutions. The combined account balances at one or more institutions typically exceed the Federal Deposit Insurance Corporation (“FDIC”) insurance coverage, and, as a result, there is a concentration of credit risk related to amounts on deposit in excess of FDIC insurance coverage. The Company believes that the risk is not significant, as the Company does not anticipate the financial institutions’ non-performance.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The valuation of financial instruments requires the Company to make estimates and judgments that affect the fair value of the instruments. The Company, where possible, bases the fair values of its financial instruments on listed market prices and third-party quotes. Where these are not available, the Company bases its estimates on current instruments with similar terms and maturities or on other factors relevant to the financial instruments. In the normal course of business, the Company is exposed to the effect of interest rate changes. The Company may seek to manage these risks by following established risk management policies and procedures, including the use of derivatives to hedge interest rate risk on debt instruments. The Company may also use derivatives to manage commodity prices in the daily operations of the business. The Company has a policy of only entering into derivative contracts with major financial institutions based upon their credit ratings and other factors. When viewed in conjunction with the underlying and offsetting exposure that the derivatives are designed to hedge, the Company has not sustained a material loss from these instruments nor does it anticipate any material adverse effect on its net income or financial position in the future. The Company recognizes all derivatives as either assets or liabilities in the consolidated balance sheets and measures those instruments at fair value. In addition, fair value adjustments will affect either shareholders’ equity/partners’ capital or net income depending on whether the derivative instruments qualify as a hedge for accounting purposes and, if so, the nature of the hedging activity. When the terms of an underlying transaction are modified, or when the underlying transaction is terminated or completed, all changes in the fair value of the instrument are marked-to-market with changes in value included in net income each period until the instrument matures. Any derivative instrument used for risk management that does not meet the hedging criteria is marked-to-market each period. The Company does not use derivatives for trading or speculative purposes.
Leases and Revenue Recognition	Leases and Revenue Recognition Rental income attributable to residential leases is recorded on a straight-line basis over the term of the lease when reasonably assured they are collectible, which is not materially different than if it were recorded when due from residents and recognized monthly as it was earned. Leases entered into between a resident and a property for the rental of an apartment unit are generally year-to-year, renewable upon consent of both parties on an annual or monthly basis. Rental income attributable to non-residential leases is also recorded on a straight-line basis over the term of the lease when reasonably assured they are collectible. Non-residential leases generally have five to ten year lease terms with market-based renewal options. Fee and asset management revenue and interest income are recorded on an accrual basis. The majority of the Company’s revenue is derived from residential, non-residential and other lease income, which are accounted for under the lease standard effective January 1, 2019. Our revenue streams have the same timing and pattern of revenue recognition across our reportable segments, with consistent allocations between the lease and revenue recognition standards. The Company is a lessor for its residential and non-residential leases and is a lessee for its corporate headquarters and regional offices and ground leases for land underlying current operating properties or projects under development. If applicable, lease agreements must be evaluated to determine the accounting treatment as a finance or operating lease in accordance with the lease standard. A lease is classified as a finance lease if it meets any of the following criteria: (a) Ownership of the underlying asset is transferred to the lessee by the end of the lease term; (b) the lessee has and is reasonably certain to exercise an option to purchase the underlying asset; (c) the lease term is for the major part of the remaining economic life of the underlying asset; (d) the present value of future minimum lease payments is equal to substantially all of the fair value of the underlying asset; and (e) the underlying asset is expected to have no alternative use to the lessor at the end of the lease term due to its specialized nature. The lease standard also requires lessees to recognize on the balance sheet: (a) a liability for the lease obligation (initially measured at the present value of the future lease payments not yet paid over the lease term); and (b) an asset for its right to use the underlying asset (initially equal to the lease liability). The discount rate for the lease is the rate implicit in the lease or, if that rate cannot be readily determined, the incremental borrowing rate. As the Company does not know the amount of the lessors’ initial direct costs, it cannot readily determine the rate implicit in the lease and instead must apply the incremental borrowing rate. The Company uses estimates and judgments on the incremental borrowing rate used to calculate the present value of the future lease payments. Since the Company’s credit backs the corporate office lease obligations and the lease terms are generally ten years or less, the discount rate range was estimated by using the Company’s borrowing rates for actual pricing data. The discount rate range for ground leases takes into account various factors, including the longer life of the ground leases, and was estimated by using the Company’s borrowing rates for actual pricing data through 30 years and other long-term market rates. The Company’s revenue streams that are not accounted for under the lease standard include: • Parking revenue – The Company’s parking revenue, not related to leasing, is derived primarily from monthly and transient daily parking and is accounted for at the point in time when control of the goods or services transfers to the customer and our performance obligation is satisfied. • Other rental and non-rental related revenue – The Company receives other income, including, but not limited to: (a) ancillary income, such as laundry, renters insurance and cable income; (b) net settlement income; and (c) miscellaneous fee income. • Gains or losses on sales of real estate properties – The Company accounts for the sale of real estate properties and any related gain recognition in accordance with the accounting guidance applicable to sales of real estate, which establishes standards for recognition of profit on all real estate sales transactions. The Company recognizes the sale, and associated gain or loss from the disposition, provided that the earnings process is complete and the Company does not have significant continuing involvement. A gain or loss is recognized when the criteria for an asset to be derecognized are met, which include when a contract exists and the buyer obtained control of the nonfinancial asset that was sold. See Note 8 for the Company’s rental income detail allocated between the lease and revenue recognition standards. The Company’s allowance for doubtful accounts (which offsets accounts receivable and is included within other assets on the consolidated balance sheets) and bad debts (which reduce rental income on the consolidated statements of operations and comprehensive income) have historically been very modest, particularly in our residential business, given the quality of our resident base and asset class. However, due to the impact of the COVID-19 pandemic, the allowance for doubtful accounts and bad debts became elevated during 2020 and remained elevated in 2021. In accordance with the lease standard, if we determine the lease payments are not probable of collection (based on known troubled accounts, rent deferral plans granted, historical experience and other currently available evidence), we fully reserve for any unpaid amounts, deferred rent receivable, variable lease payments and straight-line receivable balances and recognize rental income only if cash is received. If the Company’s estimates of collectibility differ from the cash received, then the timing and amount of the Company’s reported revenue could be impacted. See Note 8 for additional details.
Share-Based Compensation	Share-Based Compensation The Company expenses share-based compensation for employee and trustee grants of restricted shares, restricted units and share options. Any common share of beneficial interest, $0.01 par value per share (the “Common Shares”), issued pursuant to EQR’s incentive equity compensation and employee share purchase plans will result in ERPOP issuing units of partnership interest (“OP Units”) to EQR on a one-for-one basis, with ERPOP receiving the net cash proceeds of such issuances. See Note 12 for further discussion.
Income and Other Taxes	Income and Other Taxes EQR has elected to be taxed as a REIT. This, along with the nature of the operations of its operating properties, resulted in no provision for federal income taxes at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their allocable share of income or loss in their tax returns; therefore no provision for federal income taxes has been made at the ERPOP level. Historically, the Company has generally only incurred certain state and local income, excise and franchise taxes. The Company has elected taxable REIT subsidiary (“TRS”) status for certain of its corporate subsidiaries and, as a result, these entities will incur both federal and state income taxes on any taxable income of such entities after consideration of any net operating losses. The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) included tax provisions which increased allowable interest expense deductions for 2019 and 2020 (no increases for 2021) and increased the ability for taxpayers to use net operating losses. These provisions did not result in a material impact to the Company’s taxable income or tax liabilities. The CARES Act also allowed corporations to request accelerated refunds of their alternative minimum tax (“AMT”) credit. Prior to enactment of this provision, the remaining credits would have been refunded in installments in 2020, 2021 and 2022. We received a refund of our remaining $1.6 million in AMT credits during the year ended December 31, 2020. The Company’s provision for income and other tax expense (benefit) was as follows for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 2020 2019 State and local income, franchise and excise tax (benefit) $ 915 $ 852 $ 963 Alternative minimum tax credit (benefit) (1) — — (3,244 ) Income and other tax expense (benefit) (2) $ 915 $ 852 $ (2,281 ) (1) As provided in recent tax legislation which repealed the AMT credit on corporations, in 2019 the Company claimed/received $1.6 million of refunds of various AMT credit carryovers generated in prior tax years. The provision originally allowed for carryover amounts to be refunded over four years, with 50% available in the first year. The remaining $1.6 million was received in 2020 as noted above. (2) All provisions for income tax amounts are current and none are deferred. During the years ended December 31, 2021, 2020 and 2019, the tax character of the Company’s dividends and distributions were as follows (unaudited): Year Ended December 31, 2021 (1) 2020 (2) 2019 (3) Tax character of dividends and distributions: Ordinary dividends $ 1.40791 $ 1.34739 $ 1.39604 Long-term capital gain 0.73687 0.77923 0.61243 Unrecaptured section 1250 gain 0.26522 0.24838 0.23403 Dividends and distributions per Common Share/Unit outstanding $ 2.41000 $ 2.37500 $ 2.24250 (1) The Company’s fourth quarter 2021 dividends and distributions of $0.6025 per Common Share/Unit outstanding will be included as taxable income in calendar year 2022. (2) The Company’s fourth quarter 2020 dividends and distributions of $0.6025 per Common Share/Unit outstanding was included as taxable income in calendar year 2021. (3 ) The Company’s fourth quarter 2019 dividends and distributions of $0.5675 per Common Share/Unit outstanding was included as taxable income in calendar year 2020. The Company issued Internal Revenue Service (“IRS”) Form 1099-DIV to shareholders to report the tax character of Company distributions consistent with these amounts. The Company provides additional information to assist shareholders in the preparation of their tax returns. For 2021, the Company reported an AMT preference adjustment equal to $0.06 per share and disclosed amounts defined under Treasury Regulation §1.1061-6(c) of the Internal Revenue Code as “One Year” and “Three Year” amounts equal to $0.02650 per share and $0.00584 per share, respectively. The unaudited cost of land and depreciable property, net of accumulated depreciation, for federal income tax purposes as of December 31, 2021 and 2020 was approximately $13.2 billion and $13.8 billion, respectively.
Principals of Consolidation	Principles of Consolidation The Company may hold an interest in subsidiaries, partnerships, joint ventures and other similar entities and accounts for these interests in accordance with the consolidation guidance. The Company first determines whether to consolidate the entity as a variable interest entity (“VIE”) or voting interest entity, or to account for the interest under the equity method of accounting as an unconsolidated entity. In situations in which we have concluded that an entity qualifies as a VIE, it is generally because the equity investors of VIEs do not have sufficient equity at risk to finance their activities without additional subordinated financial support or do not have substantive voting rights. The Company consolidates an entity when it is considered to be the primary beneficiary of the VIE or when it controls the entity through ownership of a majority voting interest. A primary beneficiary has the power to direct the activities that most significantly impact the VIE’s performance and has the obligation to absorb the expected losses or the right to receive the expected residual returns that could potentially be significant to the VIE. In evaluating whether the entity is a VIE and/or the Company is the primary beneficiary of the entity, the Company considers several factors, including, but not limited to, proportionate share or ownership of the VIE, funding and financing sources, the business purpose of the entity, related parties, developer and property management fees and agreement terms regarding major decisions, participating and voting rights, contributions and distributions.
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities The Company accounts for investments in unconsolidated entities under the equity method of accounting and measures the investments initially at cost. The Company subsequently adjusts the carrying amount by additional cash and non-cash contributions and distributions and its proportionate share of the earnings and losses of such entities. The proportionate share of the earnings and losses are also recognized in the consolidated statements of operations and comprehensive income. In addition, we may earn fees for providing property management services or construction oversight.
Noncontrolling Interests	Noncontrolling Interests A noncontrolling interest in a subsidiary (minority interest) is an ownership interest in the consolidated entity that should be reported as equity in the consolidated financial statements and separate from the parent company’s equity. In addition, consolidated net income is required to be reported at amounts that include the amounts attributable to both the parent and the noncontrolling interest and the amount of consolidated net income attributable to the parent and the noncontrolling interest are required to be disclosed on the face of the consolidated statements of operations and comprehensive income. See Note 3 for further discussion. Operating Partnership: Net income is allocated to noncontrolling interests based on their respective ownership percentage of the Operating Partnership. The ownership percentage is calculated by dividing the number of OP Units held by the noncontrolling interests by the total OP Units held by the noncontrolling interests and EQR. Issuance of additional Common Shares and OP Units changes the ownership interests of both the noncontrolling interests and EQR. Such transactions and the related proceeds are treated as capital transactions. Partially Owned Properties: The Company reflects noncontrolling interests in partially owned properties on the balance sheet for the portion of properties consolidated by the Company that are not wholly owned by the Company. The earnings or losses from those properties attributable to the noncontrolling interests are generally based on ownership percentage and are reflected as noncontrolling interests in partially owned properties in the consolidated statements of operations and comprehensive income. Partners’ Capital The “Limited Partners” of ERPOP include various individuals and entities that contributed their properties to ERPOP in exchange for OP Units. The “General Partner” of ERPOP is EQR. Net income is allocated to the Limited Partners based on their respective ownership percentage of ERPOP. The ownership percentage is calculated by dividing the number of OP Units held by the Limited Partners by the total OP Units held by the Limited Partners and the General Partner. Issuance of additional Common Shares and OP Units changes the ownership interests of both the Limited Partners and EQR. Such transactions and the related proceeds are treated as capital transactions. Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners The Company classifies Redeemable Noncontrolling Interests – Operating Partnership / Redeemable Limited Partners in the mezzanine section of the consolidated balance sheets for the portion of OP Units that EQR is required, either by contract or securities law, to deliver registered Common Shares to the exchanging OP Unit holder. The redeemable noncontrolling interest units / redeemable limited partner units are adjusted to the greater of carrying value or fair market value based on the Common Share price of EQR at the end of each respective reporting period. See Note 3 for further discussion.
Use of Estimates	Use of Estimates In preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States, management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
Reclassifications	Reclassifications Certain reclassifications considered necessary for a fair presentation have been made to the prior period financial statements in order to conform to the current year presentation. These reclassifications have not changed the results of operations or equity/capital.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In August 2020, the Financial Accounting Standards Board (“FASB”) issued an amendment to the debt and equity financial instruments standards which simplifies the accounting for convertible instruments and accounting for contracts in an entity’s own equity. Instead of being required to assess whether an equity contract permits settlement in unregistered shares, which may require a legal analysis under the securities laws, entities will only analyze whether cash settlements are explicitly required when registered shares are unavailable. As a result, such contracts may potentially be classified in permanent rather than mezzanine equity, which may affect the way the Company’s OP Units are presented on its financial statements. The update is effective for the Company beginning on January 1, 2022, as the Company did not early adopt the standard as allowed on January 1, 2021. The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position. Recently Adopted Accounting Pronouncements In August 2021, the FASB issued an amendment to the presentation of financial statements standard which aligns the financial statements and disclosure requirements with those of the final rules released by the SEC in May 2020. The amendment changes the significance tests that determine what disclosures about significant business acquisitions are required, the periods the financial statements must cover and the pro forma financial information that must be included in certain reports. The amendment was effective for the Company upon issuance on August 9, 2021. The Company has not yet acquired businesses that exceed the threshold as defined by the standard, therefore, the amendment did not have a material effect on its consolidated results of operations and financial position. In March 2020, the FASB issued an amendment to the reference rate reform standard which provides the option for a limited period of time to ease the potential burden in accounting for, or recognizing the effects of, reference rate reform on contract modifications and hedge accounting. An example of such reform is the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. Entities that make this optional expedient election would not have to remeasure the contracts at the modification date or reassess the accounting treatment if certain criteria are met and would continue applying hedge accounting for relationships affected by reference rate reform. The new standard was effective for the Company upon issuance and elections can be made through December 31, 2022. The Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. The Company continues to evaluate the impact of the guidance and may apply other elections as applicable as additional changes in the market occur. In April 2020, a FASB staff question and answer document was issued which intended to reduce the challenges of evaluating the enforceable rights and obligations of leases for concessions granted to lessees in response to the COVID-19 pandemic. We elected not to evaluate whether qualifying concessions provided by the Company in response to the COVID-19 pandemic are a lease modification, subject to the criteria that the total payments under the amended lease cannot result in a substantial increase in the rights of the lessor or obligations of the lessee. We also elected to treat the concessions as though they were contemplated as part of the existing contracts and therefore will not apply lease modification rules to the qualifying lease concession amendments. As such, deferrals deemed collectible are recorded as rental receivables with no change to timing of rental revenues and deferrals deemed non-collectible and abatements reduce rental revenues in the deferral/abatement period and cause rental revenues to effectively follow a cash basis related to the changes. The accounting elections provided by the FASB mainly apply to the Company’s non-residential leases and the majority of the amendments will not require a straight-line adjustment. See Note 8 for additional discussion. In June 2016, the FASB issued a standard which requires companies to adopt a new approach for estimating credit losses on certain types of financial instruments, such as trade and other receivables and loans. The standard requires entities to estimate a lifetime expected credit loss for most financial instruments, including trade receivables. In November 2018, the FASB issued an amendment excluding operating lease receivables accounted for under the lease standard from the scope of the credit losses standard. The Company adopted this standard as required effective January 1, 2020, and it did not have a material effect on its consolidated results of operations and financial position.
Other	Other The Company is the controlling partner in various consolidated partnerships owning 16 properties consisting of 3,546 apartment units having a noncontrolling interest balance of $18.2 million at December 31, 2021. The Company is required to make certain disclosures regarding noncontrolling interests in consolidated limited-life subsidiaries. Of the consolidated entities described above, the Company is the controlling partner in limited-life partnerships owning two properties having a noncontrolling interest deficit balance of $4.8 million. These two partnership agreements contain provisions that require the partnerships to be liquidated through the sale of their assets upon reaching a date specified in each respective partnership agreement. The Company, as controlling partner, has an obligation to cause the property owning partnerships to distribute the proceeds of liquidation to the Noncontrolling Interests in these Partially Owned Properties only to the extent that the net proceeds received by the partnerships from the sale of their assets warrant a distribution based on the partnership agreements. As of December 31, 2021, the Company estimates the value of Noncontrolling Interest distributions for these two properties would have been approximately $70.8 million (“Settlement Value”) had the partnerships been liquidated. This Settlement Value is based on estimated third-party consideration realized by the partnerships upon disposition of the two Partially Owned Properties and is net of all other assets and liabilities, including yield maintenance on the mortgages encumbering the properties, that would have been due on December 31, 2021 had those mortgages been prepaid. Due to, among other things, the inherent uncertainty in the sale of real estate assets, the amount of any potential distribution to the Noncontrolling Interests in the Company’s Partially Owned Properties is subject to change. To the extent that the partnerships’ underlying assets are worth less than the underlying liabilities, the Company has no obligation to remit any consideration to the Noncontrolling Interests in these Partially Owned Properties.

Business (Tables)

Business (Tables)	12 Months Ended
	Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Ownership Breakdown	The ownership breakdown includes (table does not include various uncompleted development properties): Properties Apartment Units Wholly Owned Properties 294 76,861 Partially Owned Properties – Consolidated 16 3,546 310 80,407

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Summary Of Significant Accounting Policies [Abstract]
Allocation Of Income Franchise And Excise Taxes In Consolidated Statements Of Operations	The Company’s provision for income and other tax expense (benefit) was as follows for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 2020 2019 State and local income, franchise and excise tax (benefit) $ 915 $ 852 $ 963 Alternative minimum tax credit (benefit) (1) — — (3,244 ) Income and other tax expense (benefit) (2) $ 915 $ 852 $ (2,281 ) (1) As provided in recent tax legislation which repealed the AMT credit on corporations, in 2019 the Company claimed/received $1.6 million of refunds of various AMT credit carryovers generated in prior tax years. The provision originally allowed for carryover amounts to be refunded over four years, with 50% available in the first year. The remaining $1.6 million was received in 2020 as noted above. (2) All provisions for income tax amounts are current and none are deferred.
Tax Treatment Of Dividends And Distributions	During the years ended December 31, 2021, 2020 and 2019, the tax character of the Company’s dividends and distributions were as follows (unaudited): Year Ended December 31, 2021 (1) 2020 (2) 2019 (3) Tax character of dividends and distributions: Ordinary dividends $ 1.40791 $ 1.34739 $ 1.39604 Long-term capital gain 0.73687 0.77923 0.61243 Unrecaptured section 1250 gain 0.26522 0.24838 0.23403 Dividends and distributions per Common Share/Unit outstanding $ 2.41000 $ 2.37500 $ 2.24250 (1) The Company’s fourth quarter 2021 dividends and distributions of $0.6025 per Common Share/Unit outstanding will be included as taxable income in calendar year 2022. (2) The Company’s fourth quarter 2020 dividends and distributions of $0.6025 per Common Share/Unit outstanding was included as taxable income in calendar year 2021. (3 ) The Company’s fourth quarter 2019 dividends and distributions of $0.5675 per Common Share/Unit outstanding was included as taxable income in calendar year 2020.

Equity, Capital and Other Int_2

Equity, Capital and Other Interests (Tables)	12 Months Ended
	Dec. 31, 2021
Class Of Stock [Line Items]
Changes in Issued and Outstanding Common Shares and Units	The following table presents the changes in the Company’s issued and outstanding Common Shares and Units for the years ended December 31, 2021, 2020 and 2019: 2021 2020 2019 Common Shares Common Shares outstanding at January 1, 372,302,000 371,670,884 369,405,161 Common Shares Issued: Conversion of OP Units 1,354,208 122,505 313,940 Exercise of share options 1,710,692 239,695 1,745,050 Employee Share Purchase Plan (ESPP) 70,702 90,196 48,131 Restricted share grants, net 89,593 178,720 158,602 Common Shares outstanding at December 31, 375,527,195 372,302,000 371,670,884 Units Units outstanding at January 1, 13,858,073 13,731,315 13,904,035 Restricted unit grants, net 155,162 249,263 141,220 Conversion of OP Units to Common Shares (1,354,208 ) (122,505 ) (313,940 ) Units outstanding at December 31, 12,659,027 13,858,073 13,731,315 Total Common Shares and Units outstanding at December 31, 388,186,222 386,160,073 385,402,199 Units Ownership Interest in Operating Partnership 3.3 % 3.6 % 3.6 %
Changes in Redemption Value of Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): 2021 2020 2019 Balance at January 1, $ 338,951 $ 463,400 $ 379,106 Change in market value 158,598 (125,224 ) 82,283 Change in carrying value 1,428 775 2,011 Balance at December 31, $ 498,977 $ 338,951 $ 463,400
Issued and Outstanding Preferred Shares and Preference Units	The following table presents the Company’s issued and outstanding Preferred Shares/Preference Units as of December 31, 2021 and 2020: Amounts in thousands Annual Call Dividend Per December 31, December 31, Date (1) Share/Unit (2) 2021 2020 Preferred Shares/Preference Units of beneficial interest, $0.01 par value; 100,000,000 shares authorized: 8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of December 31, 2021 and 2020 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the call date, redeemable Preferred Shares/Preference Units may be redeemed for cash at the option of the Company or the Operating Partnership, respectively, in whole or in part, at a redemption price equal to the liquidation price per share/unit, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares/Preference Units are payable quarterly.
ERPOP [Member]
Class Of Stock [Line Items]
Changes in Issued and Outstanding Common Shares and Units	The following table presents the changes in the Operating Partnership’s issued and outstanding General Partner Units and Limited Partner Units for the years ended December 31, 2021, 2020 and 2019: 2021 2020 2019 General and Limited Partner Units General and Limited Partner Units outstanding at January 1, 386,160,073 385,402,199 383,309,196 Issued to General Partner: Exercise of EQR share options 1,710,692 239,695 1,745,050 EQR’s Employee Share Purchase Plan (ESPP) 70,702 90,196 48,131 EQR’s restricted share grants, net 89,593 178,720 158,602 Issued to Limited Partners: Restricted unit grants, net 155,162 249,263 141,220 General and Limited Partner Units outstanding at December 31, 388,186,222 386,160,073 385,402,199 Limited Partner Units Limited Partner Units outstanding at January 1, 13,858,073 13,731,315 13,904,035 Limited Partner restricted unit grants, net 155,162 249,263 141,220 Conversion of Limited Partner OP Units to EQR Common Shares (1,354,208 ) (122,505 ) (313,940 ) Limited Partner Units outstanding at December 31, 12,659,027 13,858,073 13,731,315 Limited Partner Units Ownership Interest in Operating Partnership 3.3 % 3.6 % 3.6 %

Real Estate (Tables)

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2021
Real Estate [Abstract]
Summary of Carrying Amounts of Investment in Real Estate	The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of December 31, 2021 and 2020 (amounts in thousands): 2021 2020 Land $ 5,814,790 $ 5,785,367 Depreciable property: Buildings and improvements 19,632,284 18,464,484 Furniture, fixtures and equipment 2,220,203 1,970,033 In-Place lease intangibles 518,324 486,137 Projects under development: Land — 23,531 Construction-in-progress 24,307 387,603 Land held for development: Land 46,160 46,160 Construction-in-progress 16,838 40,010 Investment in real estate 28,272,906 27,203,325 Accumulated depreciation (8,354,282 ) (7,859,657 ) Investment in real estate, net $ 19,918,624 $ 19,343,668
Acquired Properties From Unaffiliated Parties	During the year ended December 31, 2021, the Company acquired the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 17 4,747 $ 1,709,379 Total 17 4,747 $ 1,709,379 (1) Purchase price includes an allocation of approximately $226.3 million to land and $1.5 billion to depreciable property (inclusive of capitalized closing costs). During the year ended December 31, 2020, the Company acquired the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 1 158 $ 48,860 Total 1 158 $ 48,860 (1) Purchase price includes an allocation of approximately $5.5 million to land and $43.4 million to depreciable property (inclusive of capitalized closing costs).
Disposed Properties to Unaffiliated Parties	During the year ended December 31, 2021, the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Rental Properties – Consolidated 14 3,053 $ 1,716,775 Total 14 3,053 $ 1,716,775 During the year ended December 31, 2020, the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Rental Properties – Consolidated 6 2,231 $ 1,066,861 Land Parcels (two) — — 55,510 Total 6 2,231 $ 1,122,371

Commitments to Acquire_Dispos_2

Commitments to Acquire/Dispose of Real Estate (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments To Acquire Dispose Of Real Estate [Abstract]
Summary of Separate Agreements to Dispose	The Company has entered into separate agreements to dispose of the following (sales price and net book value in thousands): Properties Apartment Units Sales Price Net Book Value at December 31, 2021 Rental Properties – Consolidated 2 490 $ 331,150 $ 191,196 Total 2 490 $ 331,150 $ 191,196

Investments in Partially Owne_2

Investments in Partially Owned Entities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments In Partially Owned Entities [Abstract]
Summary of Company's Consolidated Joint Ventures	The following table summarizes the Company’s consolidated joint venture s as of December 31, 2021 : Operating Properties Project Under Development (1) Properties Apartment Units Project Apartment Units Consolidated Joint Ventures (VIE) 16 3,546 1 312 (1) The land under this project is subject to a long-term ground lease.
Summary of Consolidated Assets and Liabilities Related to the VIEs	The following table provides consolidated assets and liabilities related to the VIEs discussed above as of December 31, 2021 2020 December 31, 2021 December 31, 2020 Consolidated Assets $ 912,955 $ 784,066 Consolidated Liabilities $ 251,424 $ 223,989
Summary of Company's Investment in Unconsolidated Entities	The following table and information summarizes the Company’s investments in unconsolidated entities, which are accounted for under the equity method of accounting as the requirements for consolidation are not met, as of December 31, 2021 December 31, 2021 December 31, 2020 Ownership Percentage Investments in Unconsolidated Entities: Operating Property (VIE) (1) $ 36,024 $ 38,288 33.3% Unconsolidated Development Joint Ventures (VIE) (2) 72,488 — 62% - 90% (4) Real Estate Technology (3) 19,347 14,866 Varies Other (411 ) (372 ) Varies Investments in Unconsolidated Entities $ 127,448 $ 52,782 (1) Represents an unconsolidated interest in an entity that owns the land underlying one of the consolidated joint venture properties noted above and owns and operates a related parking facility. The consolidated joint venture (2) Represents unconsolidated interests in projects under development and land held for development. (3) Represents unconsolidated investments in real estate technology funds/companies. (4) In certain instances, the joint venture agreements contain provisions for promoted interests in favor of our joint venture partner. If the terms of the promoted interest are attained, then our share of the proceeds from a sale or other capital event of the unconsolidated entity may be less than the indicated ownership percentage.
Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs	The following table summarizes the Company’s unconsolidated joint ventures that were deemed to be VIEs as of December 31, 2021 Operating Property (1) Projects Under Development (2) Land Held for Development (2), (3) Entity Projects Apartment Units (4) Projects Apartment Units (4) Unconsolidated Joint Ventures (VIE) 1 3 929 3 1,005 (1) Represents the (2) Represents separate unconsolidated joint ventures for the purpose of developing multifamily rental properties. ( 3 ) Represents separate unconsolidated joint ventures that are expected to start construction in 2022. One parcel is subject to a long-term ground lease. ( 4 ) Represents the intended number of apartment units.
Summary of Information on Total Unconsolidated Development Joint Ventures Entered	The following table provides information on total unconsolidated development joint ventures entered into during the year ended December 31, 2021 Number of unconsolidated joint ventures (1) (2) 6 EQR's investments in unconsolidated entities – acquisitions $ 48,534 ( 1 ) The entities qualify as VIEs, but the Company is not the primary beneficiary because it does not have the power to direct the activities that most significantly impact the VIE’s performance. Therefore, these entities are unconsolidated and recorded using the equity method of accounting. ( 2 ) One parcel is subject to a long-term ground lease.

Restricted Deposits (Tables)

Restricted Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Deposits Restricted [Abstract]
Restricted Deposits	The following table presents the Company’s restricted deposits as of December 31, 2021 and 2020 (amounts in thousands): December 31, 2021 December 31, 2020 Mortgage escrow deposits: Replacement reserves $ 11,156 $ 9,877 Mortgage principal reserves/sinking funds 19,104 14,168 Mortgage escrow deposits 30,260 24,045 Restricted cash: Tax-deferred (1031) exchange proceeds 166,362 — Earnest money on pending acquisitions 2,000 — Restricted deposits on real estate investments 284 307 Resident security and utility deposits 35,663 31,412 Other 1,835 1,373 Restricted cash 206,144 33,092 Restricted deposits $ 236,404 $ 57,137

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Summary of Lease Income Types Relating to Lease Payments Along With the Total Other Rental Income	The following table presents the lease income types relating to lease payments for residential and non-residential leases along with the total other rental income for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Year Ended December 31, 2019 Income Type Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential Leases Non-Residential Leases Total Residential and non-residential rent $ 2,199,986 $ 61,033 $ 2,261,019 $ 2,336,778 $ 51,663 $ 2,388,441 $ 2,414,201 $ 71,988 $ 2,486,189 Utility recoveries (RUBS income) (1) 74,846 723 75,569 70,699 677 71,376 67,659 917 68,576 Parking rent 40,934 565 41,499 38,743 412 39,155 37,557 348 37,905 Other lease revenue (2) (17,667 ) 4,027 (13,640 ) (28,663 ) (5,519 ) (34,182 ) 1,979 (820 ) 1,159 Total lease revenue $ 2,298,099 $ 66,348 2,364,447 $ 2,417,557 $ 47,233 2,464,790 $ 2,521,396 $ 72,433 2,593,829 Parking revenue 26,789 22,210 28,272 Other revenue 72,761 84,705 78,590 Total other rental income (3) 99,550 106,915 106,862 Rental income $ 2,463,997 $ 2,571,705 $ 2,700,691 (1) RUBS income primarily consists of variable payments representing the recovery of utility costs from residents. (2) Other lease revenue consists of the revenue adjustment related to bad debt and other miscellaneous lease revenue. ( 3 ) Other rental income is accounted for under the revenue recognition standard.
Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances	The following table presents residential and non-residential accounts receivable and straight-line receivable balances for the Company’s properties as of December 31, 2021 and 2020 (amounts in thousands): Residential Non-Residential Balance Sheet (Other assets): December 31, 2021 December 31, 2020 December 31, 2021 December 31, 2020 Resident/tenant accounts receivable balances $ 37,959 $ 30,856 $ 3,218 $ 7,598 Allowance for doubtful accounts (33,121 ) (24,021 ) (2,365 ) (6,527 ) Net receivable balances $ 4,838 (1) $ 6,835 $ 853 $ 1,071 Straight-line receivable balances $ 7,460 $ 19,992 $ 13,021 $ 13,413 (1) The Company held residential security deposits approximating 48.2% of the net receivable balance at December 31, 2021
Summary of Residential Bad Debt for Company's Properties	The following table presents residential bad debt for the Company’s properties for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, Income Statement (Rental income): 2021 2020 2019 Bad debt, net (1) $ 31,485 $ 42,505 $ 12,067 % of rental income 1.3 % 1.7 % 0.5 % (1) Bad debt, net benefited from additional resident payments due to governmental rental assistance programs
Summary of Right-of-Use Assets and Related Lease Liabilities	The following table presents the Company’s ROU assets and related lease liabilities as of December 31, 2021 and 2020 (amounts in thousands): 2021 2020 Right-of-use assets: Corporate office leases (operating) $ 36,897 $ 39,203 Ground leases (finance) 97,575 57,584 Ground leases (operating) 340,241 402,500 Right-of-use assets $ 474,713 $ 499,287 Lease liabilities: Corporate office leases (operating) $ 37,760 $ 40,470 Ground leases (finance) 69,479 23,350 Ground leases (operating) 205,096 265,310 Lease liabilities $ 312,335 $ 329,130
Summary of Quantitative Disclosures for Lessees	The following tables illustrate the quantitative disclosures for lessees as of and for the years ended December 31, 2021, 2020 and 2019 (amounts in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Year Ended December 31, 2019 Lease cost: Finance lease cost: Amortization of right-of-use assets (capitalized) $ 351 $ — $ — Amortization of right-of-use assets (expensed) 1,391 — — Interest on lease liabilities (capitalized) 452 1,029 225 Interest on lease liabilities (expensed) 1,464 — — Operating lease cost: Corporate office leases 3,581 3,747 3,937 Ground leases 18,338 22,102 22,198 Variable lease cost: Corporate office leases 1,037 1,307 1,489 Ground leases 2,973 3,304 3,700 Total lease cost $ 29,587 $ 31,489 $ 31,549 December 31, 2021 December 31, 2020 December 31, 2019 Other information: Cash paid for amounts included in the measurement of lease liabilities: Investing cash flows from finance leases $ 383 $ 567 $ 188 Financing cash flows from finance leases $ 1,898 $ — $ 34,734 Operating cash flows from operating leases: Corporate office leases $ 5,016 $ 5,296 $ 5,494 Ground leases $ 14,682 $ 16,552 $ 16,837 ROU assets obtained in exchange for new finance lease liabilities $ — $ — $ 23,201 ROU assets obtained in exchange for new operating lease liabilities: Corporate office leases $ — $ — $ 44,298 Ground leases $ — $ — $ 422,018 Weighted-average remaining lease term – finance leases 25.2 years 18.7 years 19.7 years Weighted-average remaining lease term – operating leases: Corporate office leases 16.8 years 17.4 years 18.1 years Ground leases 61.8 years 55.3 years 56.2 years Weighted-average discount rate – finance leases 2.8 % 3.0 % 3.0 % Weighted-average discount rate – operating leases: Corporate office leases 3.2 % 3.2 % 3.2 % Ground leases 5.1 % 5.0 % 5.0 %
Summary of Undiscounted Cash Flows for Contractual Obligations for Minimum Rent Payments/Receipts	The following table summarizes the Company’s undiscounted cash flows for contractual obligations for minimum rent payments/receipts under operating and financing leases for the next five years and thereafter as of December 31, 2021: (Payments)/Receipts Due by Year (in thousands) 2022 2023 2024 2025 2026 Thereafter Total Finance Leases: Minimum Rent Payments (a) $ (2,463 ) $ (2,662 ) $ (2,880 ) $ (2,946 ) $ (2,959 ) $ (88,209 ) $ (102,119 ) Operating Leases: Minimum Rent Payments (a) $ (15,090 ) $ (14,998 ) $ (15,131 ) $ (14,957 ) $ (14,843 ) $ (831,456 ) $ (906,475 ) Minimum Rent Receipts (b) $ 58,561 $ 56,754 $ 51,295 $ 45,091 $ 37,283 $ 135,922 $ 384,906 (a) Minimum basic rent due for corporate office leases and base rent due on ground leases where the Company is the lessee. (b) Minimum basic rent receipts due for various non-residential space where the Company is the lessor. Excludes residential leases due to their short-term nature.
Summary of Reconciliation of Lease Liabilities	The following table provides a reconciliation of lease liabilities from our undiscounted cash flows for minimum rent payments as of December 31, 2021 (amounts in thousands): 2021 Total minimum rent payments $ 1,008,594 Less: Lease discount (696,259 ) Lease liabilities $ 312,335

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Instrument [Line Items]
Summary of Mortgage Notes Payable Activity	The following tables summarize the Company’s mortgage notes payable activity for the years ended December 31, 2021 and 2020, respectively (amounts in thousands): Mortgage notes payable, net as of December 31, 2020 Proceeds Lump sum payoffs Scheduled principal repayments Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Mortgage notes payable, net as of December 31, 2021 Fixed Rate Debt: Secured – Conventional $ 1,901,091 $ 28,500 (2) $ (28,200 ) $ (7,465 ) $ 1,522 $ 1,024 $ 1,896,472 Floating Rate Debt: Secured – Conventional 31,494 29,928 (3) — — — (1,532 ) 59,890 Secured – Tax Exempt 361,305 — (128,615 ) — 1,242 907 234,839 Floating Rate Debt 392,799 29,928 (128,615 ) — 1,242 (625 ) 294,729 Total $ 2,293,890 $ 58,428 $ (156,815 ) $ (7,465 ) $ 2,764 $ 399 $ 2,191,201 (1 ) Represents amortization of deferred financing costs, net of debt financing costs. (2 ) Obtained 3.58% fixed rate mortgage debt maturing on March 1, 2031. ( 3 ) Variable rate construction mortgage debt that is non-recourse to the Company maturing on June 25, 2022 (total commitment of $67.6 million). Mortgage notes payable, net as of December 31, 2019 Proceeds Lump sum payoffs Scheduled principal repayments Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Mortgage notes payable, net as of December 31, 2020 Fixed Rate Debt: Secured – Conventional $ 1,574,699 $ 495,000 (2) $ (160,522 ) $ (7,759 ) $ 988 $ (1,315 ) $ 1,901,091 Floating Rate Debt: Secured – Conventional 7,050 24,204 (3) — — — 240 31,494 Secured – Tax Exempt 359,861 — — — 1,246 198 361,305 Floating Rate Debt 366,911 24,204 — — 1,246 438 392,799 Total $ 1,941,610 $ 519,204 $ (160,522 ) $ (7,759 ) $ 2,234 $ (877 ) $ 2,293,890 (1 ) Represents amortization of deferred financing costs, net of debt financing costs. (2) Obtained a 2.60% fixed rate mortgage loan pool maturing on May 1, 2030. ( 3 ) Variable rate construction mortgage debt that is non-recourse to the Company maturing on June 25, 2022 (total commitment of $67.6 million).
Schedule of Unsecured Revolving Credit Facility	The following table presents the availability on the Company’s unsecured revolving credit facility as of December 31, 2021 and 2020 (amounts in thousands): December 31, 2021 December 31, 2020 Unsecured revolving credit facility commitment $ 2,500,000 $ 2,500,000 Commercial paper balance outstanding (315,121 ) (415,000 ) Unsecured revolving credit facility balance outstanding — — Other restricted amounts (3,507 ) (100,949 ) Unsecured revolving credit facility availability $ 2,181,372 $ 1,984,051
Summary of Debt Extinguishment Costs Recorded as Additional Interest Expense	Other The following table summarizes the Company’s total debt extinguishment costs recorded as additional interest expense during the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): December 31, 2021 December 31, 2020 December 31, 2019 Prepayment premiums/penalties $ — $ 26,150 $ 13,647 Write-offs of unamortized deferred financing costs 744 634 3,148 Write-offs of unamortized (premiums)/discounts/OCI — 12,508 7,196 Total $ 744 $ 39,292 $ 23,991
Summary of Aggregate Payments of Principal on All Debt	The following table provides a summary of the aggregate payments of principal on all debt for each of the next five years and thereafter as of December 31, 2021 (amounts in thousands): Year Total 2022 (1) $ 641,089 2023 1,329,088 2024 6,100 2025 458,200 2026 601,025 Thereafter 5,385,670 Subtotal 8,421,172 Deferred Financing Costs and Unamortized (Discount) (79,719 ) Total $ 8,341,453 (1) Includes $315.1 million in principal outstanding on the Company’s commercial paper program.
Mortgages [Member]
Debt Instrument [Line Items]
Summary of Certain Interest Rate and Maturity Date Information	The following table summarizes certain interest rate and maturity date information as of and for the years ended December 31, 2021 and 2020, respectively: December 31, 2021 December 31, 2020 Interest Rate Ranges 0.06% - 4.21% 0.06% - 4.71% Weighted Average Interest Rate 3.18% 3.33% Maturity Date Ranges 2022-2061 2021-2061
Notes [Member]
Debt Instrument [Line Items]
Summary of Certain Interest Rate and Maturity Date Information	The following table summarizes certain interest rate and maturity date information as of and for the years ended December 31, 2021 and 2020, respectively: December 31, 2021 December 31, 2020 Interest Rate Ranges 1.85% - 7.57% 2.50% - 7.57% Weighted Average Interest Rate 3.65% 4.03% Maturity Date Ranges 2023-2047 2023-2047
Summary of Notes Activity	The following tables summarize the Company’s notes activity for the years ended December 31, 2021 and 2020, respectively (amounts in thousands): Notes, net as of December 31, 2020 Proceeds Lump sum payoffs Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Notes, net as of December 31, 2021 Fixed Rate Debt: Unsecured – Public $ 5,335,536 $ 497,470 (2) $ — $ 2,538 $ (322 ) $ 5,835,222 (1) Represents amortization of deferred financing costs, net of debt financing costs. (2) Issued $500.0 million of ten-year 1.85% unsecured notes, receiving net proceeds before underwriting fees and other expenses. Notes, net as of December 31, 2019 Proceeds Lump sum payoffs Amortization of premiums/ discounts Amortization of deferred financing costs, net (1) Notes, net as of December 31, 2020 Fixed Rate Debt: Unsecured – Public $ 6,077,513 $ — $ (750,000 ) $ 2,997 $ 5,026 $ 5,335,536 (1) Represents amortization of deferred financing costs, net of debt financing costs.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Summary of Valuations for Each Type of Fair Value Measurement	The following table summarizes the inputs to the valuations for each type of fair value measurement: Fair Value Measurement Type Valuation Inputs Employee holdings (other than Common Shares) within the supplemental executive retirement plan (the “SERP”) Quoted market prices for identical assets. These holdings are included in other assets and other liabilities on the consolidated balance sheets. Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Quoted market price of Common Shares. Mortgage notes payable and private unsecured debt (including its commercial paper and line of credit, if applicable) Indicative rates provided by lenders of similar loans. Public unsecured notes Quoted market prices for each underlying issuance.
Summary of Carrying and Fair Values of Financial Instruments	The following table provides a summary of the carrying and fair values for the Company’s mortgage notes payable and unsecured debt (including its commercial paper and line of credit, if applicable) at December 31, 2021 and 2020, respectively (amounts in thousands): December 31, 2021 December 31, 2020 Carrying Value Estimated Fair Value (Level 2) Carrying Value Estimated Fair Value (Level 2) Mortgage notes payable, net $ 2,191,201 $ 2,193,689 $ 2,293,890 $ 2,313,263 Unsecured debt, net 6,150,252 6,798,309 5,750,366 6,686,612 Total debt, net $ 8,341,453 $ 8,991,998 $ 8,044,256 $ 8,999,875
Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables provide a summary of the fair value measurements for each major category of assets and liabilities measured at fair value on a recurring basis and the location within the accompanying consolidated balance sheets at December 31, 2021 and 2020, respectively (amounts in thousands): Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2021 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 164,650 $ 164,650 $ — $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 164,650 $ 164,650 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 498,977 $ — $ 498,977 $ — Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2020 Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Supplemental Executive Retirement Plan Other Assets $ 160,293 $ 160,293 $ — $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 160,293 $ 160,293 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 338,951 $ — $ 338,951 $ —
Summary of Effect of Fair Value Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income	The following tables provide a summary of the effect of fair value hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): December 31, 2021 Type of Fair Value Hedge Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative Hedged Item Income Statement Location of Hedged Item Gain/(Loss) Amount of Gain/(Loss) Recognized in Income on Hedged Item Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps N/A $ — N/A N/A $ — Total $ — $ — December 31, 2020 Type of Fair Value Hedge Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative Hedged Item Income Statement Location of Hedged Item Gain/(Loss) Amount of Gain/(Loss) Recognized in Income on Hedged Item Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps N/A $ — N/A N/A $ — Total $ — $ — December 31, 2019 Type of Fair Value Hedge Location of Gain/(Loss) Recognized in Income on Derivative Amount of Gain/(Loss) Recognized in Income on Derivative Hedged Item Income Statement Location of Hedged Item Gain/(Loss) Amount of Gain/(Loss) Recognized in Income on Hedged Item Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ 2,277 Fixed rate debt Interest expense $ (2,277 ) Total $ 2,277 $ (2,277 )
Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income	The following tables provide a summary of the effect of cash flow hedges on the Company’s accompanying consolidated statements of operations and comprehensive income for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): December 31, 2021 Type of Cash Flow Hedge Amount of Gain/(Loss) Recognized in OCI on Derivative Location of Gain/(Loss) Reclassified from Accumulated OCI into Income Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ — Interest expense $ (9,394 ) Total $ — $ (9,394 ) December 31, 2020 Type of Cash Flow Hedge Amount of Gain/(Loss) Recognized in OCI on Derivative Location of Gain/(Loss) Reclassified from Accumulated OCI into Income Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (1,190 ) Interest expense $ (35,087 ) Total $ (1,190 ) $ (35,087 ) December 31, 2019 Type of Cash Flow Hedge Amount of Gain/(Loss) Recognized in OCI on Derivative Location of Gain/(Loss) Reclassified from Accumulated OCI into Income Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (33,765 ) Interest expense $ (21,188 ) Total $ (33,765 ) $ (21,188 )

Earnings Per Share and Earnin_2

Earnings Per Share and Earnings Per Unit (Tables)	12 Months Ended
	Dec. 31, 2021
Schedule of Calculation of Numerator and Denominator in Earnings Per Share and Earnings Per Unit	The following tables set forth the computation of net income per share – basic and net income per share – diluted for the Company (amounts in thousands except per share amounts): Year Ended December 31, 2021 2020 2019 Numerator for net income per share – basic: Net income $ 1,396,714 $ 962,501 $ 1,009,708 Allocation to Noncontrolling Interests – Operating Partnership (45,900 ) (34,010 ) (36,034 ) Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (17,964 ) (14,855 ) (3,297 ) Preferred distributions (3,090 ) (3,090 ) (3,090 ) Numerator for net income per share – basic $ 1,329,760 $ 910,546 $ 967,287 Numerator for net income per share – diluted: Net income $ 1,396,714 $ 962,501 $ 1,009,708 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (17,964 ) (14,855 ) (3,297 ) Preferred distributions (3,090 ) (3,090 ) (3,090 ) Numerator for net income per share – diluted $ 1,375,660 $ 944,556 $ 1,003,321 Denominator for net income per share – basic and diluted: Denominator for net income per share – basic 373,833 371,791 370,461 Effect of dilutive securities: OP Units 12,263 13,003 12,907 Long-term compensation shares/units 1,924 1,080 2,965 ATM forward sales 69 — — Denominator for net income per share – diluted 388,089 385,874 386,333 Net income per share – basic $ 3.56 $ 2.45 $ 2.61 Net income per share – diluted $ 3.54 $ 2.45 $ 2.60
ERPOP [Member]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share and Earnings Per Unit	The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts): Year Ended December 31, 2021 2020 2019 Numerator for net income per Unit – basic and diluted: Net income $ 1,396,714 $ 962,501 $ 1,009,708 Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties (17,964 ) (14,855 ) (3,297 ) Allocation to Preference Units (3,090 ) (3,090 ) (3,090 ) Numerator for net income per Unit – basic and diluted $ 1,375,660 $ 944,556 $ 1,003,321 Denominator for net income per Unit – basic and diluted: Denominator for net income per Unit – basic 386,096 384,794 383,368 Effect of dilutive securities: Dilution for Units issuable upon assumed exercise/vesting of the Company’s long-term compensation shares/units 1,924 1,080 2,965 ATM forward sales 69 — — Denominator for net income per Unit – diluted 388,089 385,874 386,333 Net income per Unit – basic $ 3.56 $ 2.45 $ 2.61 Net income per Unit – diluted $ 3.54 $ 2.45 $ 2.60

Share Incentive Plans (Tables)

Share Incentive Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Terms of Awards Generally Granted to Employees	The following table summarizes the terms of Awards generally granted to employees: Options Restricted Shares Restricted Units Overview Options exercised after vesting result in issuance of new Common Shares. Restricted shareholders generally have the same voting rights and receive quarterly dividend payments on their shares at the same rate and on the same date as any other Common Share holder (1). When certain conditions are met, restricted units convert into an equal number of OP Units, which the holder may exchange for Common Shares on a one-for-one basis or at the option of the Company the cash value of such shares. Restricted unitholders receive quarterly distribution payments on their restricted units at the same rate and on the same date as any other OP Unit holder (1). Grant/Exercise Price Granted at the fair market value of Common Shares as of the grant date. Granted at the fair market value of Common Shares as of the grant date. Granted at varying discount rates to the fair market value of Common Shares as of the grant date (2). Vesting Period In three equal installments over a three-year period from the grant date. Three years from the grant date. Three years from the grant date. Expiration Ten years from the grant date. Not applicable. Ten years from the grant date (2). Upon Employee Termination Unvested options are canceled. Unvested restricted shares are canceled. Unvested restricted units are canceled. (1) Dividends/distributions paid on unvested restricted shares and units are included as a component of retained earnings and Noncontrolling Interest – Operating Partnership/Limited Partners Capital, respectively, and have not been considered in reducing net income available to Common Shares/Units in a manner similar to the Company’s preferred share/preference unit dividends for the earnings per share/Unit calculation. (2) A restricted unit will automatically convert to an OP Unit when the capital account of each restricted unit increases (“books-up”) to a specified target. The probability of a book-up occurring within the ten-year contractual life along with the liquidity risk associated with various hold period restrictions are both reflected in the discount. If the capital target is not attained within ten years following the date of issuance, the restricted unit will automatically be canceled and no compensation will be payable to the holder of such canceled restricted unit. If the capital target is attained and the restricted unit is converted to an OP Unit, it will not expire.
Summary of Valuation Method of Share Options	The fair value of the Option grants is recognized over the requisite service/vesting period of the Options. The fair value for the Company’s Options was estimated at the time the Options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions: 2021 2020 2019 Expected volatility (1) 21.3 % 15.2 % 16.3 % Expected life (2) 5 years 5 years 5 years Expected dividend yield (3) 3.23 % 3.04 % 3.10 % Risk-free interest rate (4) 0.50 % 1.32 % 2.43 % Exercise price per share (5) $ 67.48 $ 83.08 $ 72.02 Option valuation per share $ 7.96 $ 7.23 $ 8.06 (1) Expected volatility – Estimated based on the historical five-year (2) Expected life – Approximates the actual weighted average life of all Options granted since the Company went public in 1993. (3) Expected dividend yield – Calculated by averaging the historical annual yield on EQR shares for a period matching the expected life of each grant, with the annual yield calculated by dividing actual regular dividends (excluding any special dividends) by the average price of EQR’s shares in a given year. (4) Risk-free interest rate – The most current U.S. Treasury rate available at the grant date for a period matching the expected life of each grant. (5) Exercise price per share – The closing share price of the Common Shares on the grant date.
Summary of Terms of Each Retirement Eligibility Category	The following table summarizes the terms of each retirement eligibility category. Age 62 for Employees Rule of 70 for Employees Age 72 for Trustees Eligibility For employees hired prior to January 1, 2009 and who were age 59 or older as of February 1, 2019. All employees (1). All non-employee Trustees. Effect on unvested restricted shares, restricted units and Options Awards immediately vest and Options continue to be exercisable for the balance of the applicable ten-year option period. Awards continue to vest per the original vesting schedule, subject to certain conditions, and Options continue to be exercisable for the balance of the applicable ten-year option period. Awards immediately vest and Options continue to be exercisable for the balance of the applicable ten-year option period. Effect on LTI Plan Awards are prorated in proportion to the number of days worked in the first year of the three-year performance period and the individual does not receive any payout of shares or units until the final payout is determined at the end of the three-year performance period. (1) The Rule of 70 is met when an employee’s years of service with the Company (which must be at least 15 years) plus his or her age (which must be at least 55 years) on the date of termination equals or exceeds 70 years. In addition, the employee must give the Company at least six months’ advance written notice of his or her intention to retire along with agreeing to certain other conditions.
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan	The following tables summarize compensation information regarding the restricted shares, restricted units, Options and Employee Share Purchase Plan (“ESPP”) for the three years ended December 31, 2021, 2020 and 2019. Year Ended December 31, 2021 Compensation Expense Compensation Capitalized Restricted Units/Options In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 7,258 $ 1,131 $ — $ 8,389 $ 761 Restricted units (2) 16,689 70 1,038 17,797 1,254 Options 2,980 121 — 3,101 — ESPP discount 883 108 — 991 — Total $ 27,810 $ 1,430 $ 1,038 $ 30,278 $ 2,015 Year Ended December 31, 2020 Compensation Expense Compensation Capitalized Restricted Units/Options In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 10,053 $ 1,172 $ — $ 11,225 $ 1,172 Restricted units (2) 10,103 80 1,743 11,926 1,855 Options 2,156 193 — 2,349 — ESPP discount 862 82 — 944 — Total $ 23,174 $ 1,527 $ 1,743 $ 26,444 $ 3,027 Year Ended December 31, 2019 Compensation Expense Compensation Capitalized Restricted Units/Options In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 11,522 $ 916 $ — $ 12,438 $ 979 Restricted units (2) 9,905 240 3,265 13,410 825 Options 2,420 254 1 2,675 — ESPP discount 602 40 — 642 — Total $ 24,449 $ 1,450 $ 3,266 $ 29,165 $ 1,804 (1) The Company allows eligible officers the ability to receive immediately vested restricted units (subject to the book-up provisions described above and a two-year hold restriction) or immediately vested Options in-lieu of any percentage of their annual cash bonus. (2) Includes LTI plan awards granted under the executive compensation program.
Award Activity of the Share Incentive Plans	The table below summarizes the Award activity of the Share Incentive Plans for the three years ended December 31, 2021, 2020 and 2019: Common Shares Subject to Options Weighted Average Exercise Price per Option Restricted Shares Weighted Average Fair Value per Restricted Share Restricted Units Weighted Average Fair Value per Restricted Unit Balance at December 31, 2018 7,112,235 $ 52.35 299,425 $ 66.52 1,139,848 $ 71.07 Awards granted (1) 234,147 $ 72.10 163,799 $ 73.96 141,772 $ 67.22 Awards exercised/vested (1,745,050 ) $ 44.72 (151,321 ) $ 75.41 (422,784 ) $ 70.77 Awards forfeited (30,489 ) $ 61.92 (5,197 ) $ 65.35 (552 ) $ 69.43 Awards expired (3,299 ) $ 40.39 — $ — — $ — Balance at December 31, 2019 5,567,544 $ 55.52 306,706 $ 66.15 858,284 $ 64.95 Awards granted (1) 317,731 $ 76.26 179,911 $ 77.44 249,263 $ 72.00 Awards exercised/vested (239,695 ) $ 50.31 (131,792 ) $ 66.32 (227,747 ) $ 68.47 Awards forfeited (1,344 ) $ 72.69 (1,191 ) $ 73.45 — $ — Awards expired (1,484 ) $ 47.18 — $ — — $ — Balance at December 31, 2020 5,642,752 $ 56.91 353,634 $ 71.81 879,800 $ 66.78 Awards granted (1) 489,853 $ 67.58 96,224 $ 70.46 190,742 $ 60.71 Awards exercised/vested (1,710,692 ) $ 50.09 (133,351 ) $ 62.89 (181,531 ) $ 62.01 Awards forfeited (23,317 ) $ 73.33 (6,631 ) $ 74.31 (35,580 ) $ 59.82 Awards expired (10,763 ) $ 68.00 — $ — — $ — Balance at December 31, 2021 4,387,833 $ 60.65 309,876 $ 75.17 853,431 $ 66.11 (1) Includes LTI plan awards granted under the executive compensation program. Amounts in thousands except per share amounts Year Ended December 31, 2021 2020 2019 Weighted average grant date fair value per share for Options granted $ 7.98 $ 6.74 $ 8.05 Aggregate intrinsic value of Options exercised (1) $ 47,413 $ 7,569 $ 58,066 Fair value of restricted shares vested $ 9,222 $ 10,559 $ 11,133 Fair value of restricted units vested $ 12,468 $ 18,711 $ 29,149 (1) These values were calculated as the difference between the strike price of the underlying awards and the per share price at which each respective award was exercised.
Information Regarding Options Outstanding and Exercisable	The following table summarizes information regarding Options outstanding and exercisable at December 31, 2021 (aggregate intrinsic value is in thousands): Options Weighted Average Remaining Contractual Life in Years Weighted Average Exercise Price Aggregate Intrinsic Value (1) Options Outstanding 4,387,833 5.37 $ 60.65 $ 130,999 Options Exercisable 3,710,888 4.76 $ 58.70 $ 118,015 Vested and expected to vest 666,334 8.71 $ 71.33 $ 12,775 (1) The aggregate intrinsic values were calculated as the excess, if any, between the Company’s closing share price of $90.50 per share on December 31, 2021 and the strike price of the underlying awards.
LTI Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Weighted Average Fair Value for Each Restricted Share/Unit	The grant date fair value of the TSR portion of the LTI awards is estimated using a multifactor Monte Carlo model to determine share prices for an absolute award for which the payout of the award only depends on EQR’s TSR and a set of relative awards for which the payout of the award depends on the spread of EQR’s TSR to the TSR of two indices: (a) the FTSE Nareit Apartment Index; and (b) the FTSE Nareit Equity Index. The grant date fair value of the Normalized FFO portion of the LTI awards is estimated using the closing price of EQR Common Shares on the grant date for the restricted shares and a discounted closing price of EQR Common Shares on the grant date for the restricted units to reflect the “book-up” and liquidity risk inherent in the units. The individual prices determined above are then weighted to arrive at the final values for each restricted share/unit as follows: 2021 2020 2019 Weighted average fair value per restricted share $ 61.73 $ 75.89 $ 65.36 Weighted average fair value per restricted unit $ 59.82 $ 72.69 $ 63.12

Employee Plans (Tables)

Employee Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Employee Service Share Based Compensation Aggregate Disclosures [Abstract]
Summary of Information Regarding the Common Shares Issued Under the ESPP	The following table summarizes information regarding the Common Shares issued under the ESPP with the net proceeds noted below being contributed to ERPOP in exchange for OP Units (amounts in thousands except share and per share amounts): Year Ended December 31, 2021 2020 2019 Shares issued 70,702 90,196 48,131 Issuance price ranges $53.13 – $71.04 $46.23 – $63.84 $59.56 – $72.91 Issuance proceeds $ 4,265 $ 4,508 $ 3,116

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Summary of Joint Venture and Real Estate Technology Fund Commitments	The following table summarizes the Company’s approximate real estate commitments at December 31, 2021 (amounts in thousands for remaining commitments): Remaining Projects/Investments Apartment Units Commitments Projects Under Development Consolidated 1 312 $ 83,720 Unconsolidated 3 929 264,290 Total Projects Under Development (1) 4 1,241 $ 348,010 Real Estate Technology Investments 9 — $ 30,947 (1) Remaining commitments for total projects under development represent the gross amounts, with funds to be provided by the Company, its joint venture partners and/or applicable construction loans.
Schedule of Contractual Obligations	The following table summarizes the Company’s contractual obligations for deferred compensation for the next five years and thereafter as of December 31, 2021: (Payments) Due by Year (in thousands) 2022 2023 2024 2025 2026 Thereafter Total Other Long-Term Liabilities: Deferred Compensation (1) $ (773 ) $ (1,013 ) $ (732 ) $ (732 ) $ (732 ) $ (4,023 ) $ (8,005 ) (1) Estimated payments to the Company’s Chairman and one former executive officer based on actual and estimated retirement dates.

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations	The following table presents a reconciliation of NOI from our rental real estate for the years ended December 31, 2021, 2020 and 2019, respectively (amounts in thousands): Year Ended December 31, 2021 2020 2019 Rental income $ 2,463,997 $ 2,571,705 $ 2,700,691 Property and maintenance expense (453,532 ) (440,998 ) (446,845 ) Real estate taxes and insurance expense (397,105 ) (381,562 ) (366,139 ) Total operating expenses (850,637 ) (822,560 ) (812,984 ) Net operating income $ 1,613,360 $ 1,749,145 $ 1,887,707
Schedule of NOI from Rental Real Estate for Each Segment Specific to Continuing Operations	The following tables present NOI from our rental real estate for each segment for the years ended December 31, 2021, 2020 and 2019, respectively, as well as total assets and capital expenditures at December 31, 2021 and 2020, respectively (amounts in thousands): Year Ended December 31, 2021 Year Ended December 31, 2020 Year Ended December 31, 2019 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 447,094 $ 141,636 $ 305,458 $ 444,129 $ 140,469 $ 303,660 $ 485,084 $ 144,314 $ 340,770 Orange County 109,427 24,986 84,441 105,236 24,545 80,691 105,087 24,359 80,728 San Diego 78,709 18,396 60,313 74,737 18,176 56,561 73,698 17,889 55,809 Subtotal - Southern California 635,230 185,018 450,212 624,102 183,190 440,912 663,869 186,562 477,307 San Francisco 391,022 121,134 269,888 435,371 117,085 318,286 473,102 115,702 357,400 Washington D.C. 393,374 130,445 262,929 405,571 125,353 280,218 394,171 119,419 274,752 New York 405,830 202,954 202,876 424,534 197,740 226,794 464,270 191,514 272,756 Seattle 245,484 77,537 167,947 257,372 74,362 183,010 252,311 68,717 183,594 Boston 232,233 75,698 156,535 240,158 71,611 168,547 253,297 70,875 182,422 Other Markets 39,084 11,209 27,875 37,917 11,040 26,877 18,215 4,713 13,502 Total same store 2,342,257 803,995 1,538,262 2,425,025 780,381 1,644,644 2,519,235 757,502 1,761,733 Non-same store/other (2) (3) Non-same store 51,604 21,296 30,308 11,791 2,706 9,085 58,751 17,702 41,049 Other (3) 70,136 25,346 44,790 134,889 39,473 95,416 122,705 37,780 84,925 Total non-same store/other 121,740 46,642 75,098 146,680 42,179 104,501 181,456 55,482 125,974 Totals $ 2,463,997 $ 850,637 $ 1,613,360 $ 2,571,705 $ 822,560 $ 1,749,145 $ 2,700,691 $ 812,984 $ 1,887,707 (1 ) For the years ended December 31, 2021 and 2020, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2020, less properties subsequently sold, which represented 74,077 apartment units. For the year ended December 31, 2019, same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2019, less properties subsequently sold, which represented 73,585 apartment units. (2) For the years ended December 31, 2021 and 2020, non-same store primarily includes properties acquired after January 1, 2020, plus any properties in lease-up and not stabilized as of January 1, 2020. For the year ended December 31, 2019, non-same store primarily includes properties acquired after January 1, 2019, plus any properties in lease-up and not stabilized as of January 1, 2019. (3) Other includes development, other corporate operations and operations prior to disposition for properties sold. Year Ended December 31, 2021 Year Ended December 31, 2020 Total Assets Capital Expenditures Total Assets Capital Expenditures Same store (1) Los Angeles $ 2,792,948 $ 21,507 $ 2,905,404 $ 21,537 Orange County 371,063 5,647 389,007 7,260 San Diego 232,345 2,899 242,429 3,430 Subtotal - Southern California 3,396,356 30,053 3,536,840 32,227 San Francisco 3,195,089 22,416 3,310,083 18,091 Washington D.C. 3,177,162 27,148 3,291,760 23,637 New York 3,897,202 29,623 4,000,355 25,716 Seattle 1,958,145 15,038 2,023,183 11,621 Boston 1,694,432 21,095 1,758,665 18,367 Denver 492,454 2,015 512,131 1,579 Total same store 17,810,840 147,388 18,433,017 131,238 Non-same store/other (2) (3) Non-same store 2,512,611 1,704 671,216 73 Other (3) 845,790 1,927 1,182,658 4,668 Total non-same store/other 3,358,401 3,631 1,853,874 4,741 Totals $ 21,169,241 $ 151,019 $ 20,286,891 $ 135,979 (1) Same store primarily includes all properties acquired or completed that were stabilized prior to January 1, 2020, less properties subsequently sold, which represented 74,077 apartment units. (2) Non-same store primarily includes properties acquired after January 1, 2020, plus any properties in lease-up and not stabilized as of January 1, 2020. (3) Other includes development, other corporate operations and capital expenditures for properties sold.

Business - Ownership Breakdown

Business - Ownership Breakdown (Details)	Dec. 31, 2021PropertyApartmentUnit
Property/Unit schedule
Properties | Property	310
Apartment Units | ApartmentUnit	80,407
Wholly Owned Properties
Property/Unit schedule
Properties | Property	294
Apartment Units | ApartmentUnit	76,861
Partially Owned Properties – Consolidated
Property/Unit schedule
Properties | Property	16
Apartment Units | ApartmentUnit	3,546

Business - Additional Informati

Business - Additional Information (Details)	Dec. 31, 2021PropertyApartmentUnitState
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of states in which entity operates | State	10
Properties | Property	310
Apartment units | ApartmentUnit	80,407
ERPOP [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Noncontrolling interest, ownership percentage by parent	96.70%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021USD ($)PropertyApartmentUnit$ / shares	Dec. 31, 2020USD ($)$ / shares	Dec. 31, 2019USD ($)$ / shares
Lease intangibles, average term	6 months
Capitalized costs development and renovation	$ 13,900,000	$ 12,100,000
Lessee, finance lease, description	The Company is a lessor for its residential and non-residential leases and is a lessee for its corporate headquarters and regional offices and ground leases for land underlying current operating properties or projects under development.  If applicable, lease agreements must be evaluated to determine the accounting treatment as a finance or operating lease in accordance with the lease standard.  A lease is classified as a finance lease if it meets any of the following criteria:  (a) Ownership of the underlying asset is transferred to the lessee by the end of the lease term; (b) the lessee has and is reasonably certain to exercise an option to purchase the underlying asset; (c) the lease term is for the major part of the remaining economic life of the underlying asset; (d) the present value of future minimum lease payments is equal to substantially all of the fair value of the underlying asset; and (e) the underlying asset is expected to have no alternative use to the lessor at the end of the lease term due to its specialized nature.
Lessee, finance lease residual value guarantee, description	the present value of future minimum lease payments is equal to substantially all of the fair value of the underlying asset
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.01	$ 0.01	$ 0.01
Provision for income tax	$ 915,000	$ 852,000	$ (2,281,000)
Remaining AMT refund received		1,600,000
Land and depreciable property net	$ 13,200,000,000	13,800,000,000
Alternative minimum tax preference adjustment per share | $ / shares	$ 0.06
Alternative minimum tax preference adjustment disclosed under treasury regulation year one per share | $ / shares	0.02650
Alternative minimum tax preference adjustment disclosed under treasury regulation year three per share | $ / shares	$ 0.00584
Properties | Property	310
Noncontrolling Interests – Partially Owned Properties	$ 18,166,000	$ 4,673,000
Apartment units | ApartmentUnit	80,407
Partially Owned Properties – Consolidated
Properties | Property	16
Noncontrolling Interests – Partially Owned Properties	$ 18,200,000
Apartment units | ApartmentUnit	3,546
Limited Life Partnership Properties [Member]
Properties | Property	2
Noncontrolling Interests – Partially Owned Properties	$ (4,800,000)
Noncontrolling interests settlement value	70,800,000
Federal [Member]
Provision for income tax	$ 0
Minimum [Member] | Retail Commercial Leases [Member]
Retail leases term	5 years
Maximum [Member] | Retail Commercial Leases [Member]
Retail leases term	10 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, plant and equipment, estimated useful lives	5 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, plant and equipment, estimated useful lives	10 years
Building [Member]
Property, plant and equipment, estimated useful lives	30 years
Replacements [Member] | Minimum [Member]
Property, plant and equipment, estimated useful lives	5 years
Replacements [Member] | Maximum [Member]
Property, plant and equipment, estimated useful lives	10 years
Renovations and Improvements Minimum [Member] | Minimum [Member]
Property, plant and equipment, estimated useful lives	5 years
Renovations and Improvements Minimum [Member] | Maximum [Member]
Property, plant and equipment, estimated useful lives	15 years
Corporate Office Leases [Member] | Maximum [Member]
Remaining lease terms	10 years
Ground Leases [Member]
Unsecured borrowing rates for actual pricing period used for calculating discount rate	30 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Tax (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Abstract]
State and local income, franchise and excise tax (benefit)	$ 915	$ 852	$ 963
Alternative minimum tax credit (benefit)			(3,244)
Income and other tax expense (benefit)	$ 915	$ 852	$ (2,281)
Tax Treatment Of Dividends And Distributions Ordinary Dividends	$ 1.40791	$ 1.34739	$ 1.39604
Tax Treatment Of Dividends And Distributions Long Term Capital Gain	0.73687	0.77923	0.61243
Tax Treatment Of Dividends And Distributions Unrecaptured Section Twelve Hundred And Fifty Gain	0.26522	0.24838	0.23403
Dividends and distributions declared per Common Share outstanding	$ 2.41000	$ 2.37500	$ 2.24250

Summary of Significant Accoun_6

Summary of Significant Accounting Policies Tax (Parenthetical) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Disclosure Summary Of Significant Accounting Policies Tax Parenthetical Details [Abstract]
Income tax refund claims or receives	$ 1.6
Term to refund carryover amount	4 years
Refund percentage available in first year	50.00%
Remaining Tax Carryover Amount	$ 1.6
Dividend payable common share/unit, per share	$ 0.5675	$ 0.6025	$ 0.6025

Equity, Capital and Other Int_3

Equity, Capital and Other Interests - Changes in the Company's Issued and Outstanding Common Shares and Units (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	372,302,000	371,670,884	369,405,161
Common Shares Issued:
Conversion of OP Units	1,354,208	122,505	313,940
Exercise of share options	1,710,692	239,695	1,745,050
Employee Share Purchase Plan (ESPP)	70,702	90,196	48,131
Restricted share grants, net	89,593	178,720	158,602
Common Stock, Shares, Outstanding	375,527,195	372,302,000	371,670,884
Units
Total Units Outstanding	13,858,073	13,731,315	13,904,035
Restricted unit grants, net	155,162	249,263	141,220
Conversion of OP Units to Common Shares	(1,354,208)	(122,505)	(313,940)
Total Units Outstanding	12,659,027	13,858,073	13,731,315
Common Shares And Units Outstanding	388,186,222	386,160,073	385,402,199
Units Ownership Interest in Operating Partnership	3.30%	3.60%	3.60%

Equity, Capital and Other Int_4

Equity, Capital and Other Interests - Changes in Operating Partnership's Issued and Outstanding General Partner Units and Limited Partner Units (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
General and Limited Partner Units
Common Shares And Units Outstanding	386,160,073	385,402,199
Exercise of share options	1,710,692	239,695	1,745,050
Employee Share Purchase Plan (ESPP)	70,702	90,196	48,131
Restricted share grants, net	89,593	178,720	158,602
Restricted unit grants, net	155,162	249,263	141,220
Common Shares And Units Outstanding	388,186,222	386,160,073	385,402,199
Limited Partner Units
Total Units Outstanding	13,858,073	13,731,315	13,904,035
Restricted unit grants, net	155,162	249,263	141,220
Conversion of Limited Partner OP Units to EQR Common Shares	(1,354,208)	(122,505)	(313,940)
Total Units Outstanding	12,659,027	13,858,073	13,731,315
Units Ownership Interest in Operating Partnership	3.30%	3.60%	3.60%
ERPOP [Member]
General and Limited Partner Units
Common Shares And Units Outstanding	386,160,073	385,402,199	383,309,196
Exercise of share options	1,710,692	239,695	1,745,050
Employee Share Purchase Plan (ESPP)	70,702	90,196	48,131
Restricted share grants, net	89,593	178,720	158,602
Restricted unit grants, net	155,162	249,263	141,220
Common Shares And Units Outstanding	388,186,222	386,160,073	385,402,199
Limited Partner Units
Total Units Outstanding	13,858,073	13,731,315	13,904,035
Restricted unit grants, net	155,162	249,263	141,220
Conversion of Limited Partner OP Units to EQR Common Shares	(1,354,208)	(122,505)	(313,940)
Total Units Outstanding	12,659,027	13,858,073	13,731,315
Units Ownership Interest in Operating Partnership	3.30%	3.60%	3.60%

Equity, Capital and Other Int_5

Equity, Capital and Other Interests - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity Capital And Other Interests [Abstract]
Redeemable noncontrolling interests - operating partnership	$ 498,977	$ 338,951	$ 463,400	$ 379,106
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, par or stated value per share	$ 0.01	$ 0.01

Equity, Capital and Other Int_6

Equity, Capital and Other Interests - Changes in Redemption Value of Redeemable Noncontrolling Interests - Operating Partnership (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity Capital And Other Interests [Abstract]
Redeemable noncontrolling interests - operating partnership	$ 338,951	$ 463,400	$ 379,106
Change in market value of Redeemable Noncontrolling Interests - Operating Partnership	158,598	(125,224)	82,283
Change in carrying value of Redeemable Noncontrolling Interests - Operating Partnership	1,428	775	2,011
Redeemable noncontrolling interests - operating partnership	$ 498,977	$ 338,951	$ 463,400

Equity, Capital and Other Int_7

Equity, Capital and Other Interests - Changes in Redemption Value of Redeemable Limited Partners Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity Capital And Other Interests [Abstract]
Redeemable Limited Partners	$ 338,951	$ 463,400	$ 379,106
Limited Partners Change In Redemption Value	158,598	(125,224)	82,283
Limited Partners Change In Carrying Value	1,428	775	2,011
Redeemable Limited Partners	$ 498,977	$ 338,951	$ 463,400

Equity, Capital and Other Int_8

Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Details) - ERPOP [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of December 31, 2021 and 2020	$ 37,280	$ 37,280
Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stocks Preference Units Call Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 745,600 shares/units issued and outstanding as of December 31, 2021 and 2020	$ 37,280	$ 37,280

Equity, Capital and Other Int_9

Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Parenthetical) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stock Preference Units Issued	745,600	745,600
Preferred Stock Preference Units Outstanding	745,600	745,600
Preferred Stock Preference Units Redemption Price Per Share	$ 50	$ 50
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%

Equity, Capital and Other In_10

Equity, Capital and Other Interests - Other - Additional Information (Details) - USD ($)	12 Months Ended	95 Months Ended	168 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Common Stock, Shares, Issued	375,527,195	375,527,195	375,527,195	372,302,000
Stock repurchase program, number of shares authorized to be repurchased	13,000,000	13,000,000	13,000,000
Stock open market repurchased and retired during period, shares		0	0
Stock repurchase program, remaining number of shares authorized to be repurchased	13,000,000	13,000,000	13,000,000
Forward Sales Agreements [Member]
Class Of Stock [Line Items]
Additional common shares authorized	13,000,000	13,000,000	13,000,000
Amount of share issuance	$ 0
Settlement of shares under forward sales agreement	0	0	0
ATM Share Offering [Member] | Forward Sales Agreements [Member]
Class Of Stock [Line Items]
Common Stock, Shares, Issued	1,700,000	1,700,000	1,700,000
Weighted average initial forward price per share	$ 83.25	$ 83.25	$ 83.25

Real Estate - Summary of Carryi

Real Estate - Summary of Carrying Amounts of Investment in Real Estate (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Land	$ 5,814,790	$ 5,785,367
Depreciable property:
Buildings and improvements	19,632,284	18,464,484
Furniture, fixtures and equipment	2,220,203	1,970,033
In-Place lease intangibles	518,324	486,137
Projects under development:
Projects under development	24,307	411,134
Land held for development:
Land held for development	62,998	86,170
Investment in real estate	28,272,906	27,203,325
Accumulated depreciation	(8,354,282)	(7,859,657)
Investment in real estate, net	19,918,624	19,343,668
Land [Member]
Land	15,000
Projects under development:
Projects under development		23,531
Land held for development:
Land held for development	46,160	46,160
Construction-in-progress [Member]
Projects under development:
Projects under development	24,307	387,603
Land held for development:
Land held for development	$ 16,838	$ 40,010

Real Estate - Acquired Properti

Real Estate - Acquired Properties From Unaffiliated Parties (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)PropertyApartmentUnit	Dec. 31, 2020USD ($)PropertyApartmentUnit
Properties acquired | Property	17	1
Property Units acquired | ApartmentUnit	4,747	158
Purchase Price | $	$ 1,709,379	$ 48,860
Rental Properties – Consolidated [Member]
Properties acquired | Property	17	1
Property Units acquired | ApartmentUnit	4,747	158
Purchase Price | $	$ 1,709,379	$ 48,860

Real Estate - Acquired Proper_2

Real Estate - Acquired Properties From Unaffiliated Parties (Parenthetical) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Purchase price	$ 1,709,379	$ 48,860
Land [Member]
Purchase price	226,300	5,500
Depreciable Property [Member]
Purchase price	$ 1,500,000	$ 43,400

Real Estate - Disposed Properti

Real Estate - Disposed Properties to Unaffiliated Parties (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)PropertyApartmentUnit	Dec. 31, 2020USD ($)PropertyApartmentUnit
Properties disposed | Property	14	6
Property Units disposed | ApartmentUnit	3,053	2,231
Sales Price	$ 1,716,775	$ 1,122,371
Rental Properties – Consolidated [Member]
Properties disposed | Property	14	6
Property Units disposed | ApartmentUnit	3,053	2,231
Sales Price	$ 1,716,775	$ 1,066,861
Land Parcels [Member]
Sales Price		$ 55,510

Real Estate - Additional Inform

Real Estate - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net gain on sales of real estate properties	$ 1,072,183	$ 531,807	$ 447,637
Net gain on sales of land parcels	5	34,234	$ 2,044
Non-cash asset impairment charge	16,769
Carrying value	5,814,790	$ 5,785,367
Land [Member]
Non-cash asset impairment charge	16,800
Carrying value	$ 15,000

Commitments to Acquire_Dispos_3

Commitments to Acquire/Dispose of Real Estate - Summary of Separate Agreements to Dispose (Details) $ in Thousands	Dec. 31, 2021USD ($)PropertyApartmentUnit
Property/Unit schedule
Properties | Property	2
Apartment Units | ApartmentUnit	490
Sales Price	$ 331,150
Net Book Value at December 31, 2021	$ 191,196
Rental Properties – Consolidated [Member] | Wholly Owned Properties [Member]
Property/Unit schedule
Properties | Property	2
Apartment Units | ApartmentUnit	490
Sales Price	$ 331,150
Net Book Value at December 31, 2021	$ 191,196

Investments in Partially Owne_3

Investments in Partially Owned Entities - Summary of Company's Consolidated Joint Ventures (Details)	Dec. 31, 2021PropertyApartmentUnitProject
Variable Interest Entity [Line Items]
Properties | Property	310
Apartment units	80,407
Consolidated VIE [Member] | Operating Properties [Member]
Variable Interest Entity [Line Items]
Properties | Property	16
Apartment units	3,546
Consolidated VIE [Member] | Project Under Development [Member]
Variable Interest Entity [Line Items]
Project | Project	1
Apartment units	312

Investments in Partially Owne_4

Investments in Partially Owned Entities - Summary of Consolidated Assets and Liabilities Related to the VIEs (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Consolidated Assets	$ 21,169,241	$ 20,286,891
Consolidated Liabilities	9,483,056	9,184,454
Consolidated VIE [Member]
Variable Interest Entity [Line Items]
Consolidated Assets	912,955	784,066
Consolidated Liabilities	$ 251,424	$ 223,989

Investments in Partially Owne_5

Investments in Partially Owned Entities - Summary of Company's Investment in Unconsolidated Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 127,448	$ 52,782
Unconsolidated Development Joint Ventures [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 72,488
Unconsolidated Development Joint Ventures [Member] | Minimum [Member]
Variable Interest Entity [Line Items]
Ownership Percentage	62.00%
Unconsolidated Development Joint Ventures [Member] | Maximum [Member]
Variable Interest Entity [Line Items]
Ownership Percentage	90.00%
Real Estate Technology [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 19,347	14,866
Other [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	(411)	(372)
Unconsolidated VIE [Member] | Operating Property [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated Entities	$ 36,024	$ 38,288
Ownership Percentage		33.30%

Investments in Partially Owne_6

Investments in Partially Owned Entities - Summary of Company's Investment in Unconsolidated Entities (Parenthetical) (Details) - Entity	Dec. 31, 2021	Dec. 31, 2020
Operating Property [Member]
Variable Interest Entity [Line Items]
Number of unconsolidated interest in entity owns land on consolidated joint venture properties owns and operates a related parking facility	1	1

Investments in Partially Owne_7

Investments in Partially Owned Entities - Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs (Details)	Dec. 31, 2021ApartmentUnitProjectEntity
Variable Interest Entity [Line Items]
Apartment units	80,407
Unconsolidated VIE [Member] | Operating Property [Member]
Variable Interest Entity [Line Items]
Entity | Entity	1
Unconsolidated VIE [Member] | Projects Under Development [Member]
Variable Interest Entity [Line Items]
Project | Project	3
Apartment units	929
Unconsolidated VIE [Member] | Land Held For Development [Member]
Variable Interest Entity [Line Items]
Project | Project	3
Apartment units	1,005

Investments in Partially Owne_8

Investments in Partially Owned Entities - Summary of Company's Unconsolidated Joint Ventures Deemed to be VIEs (Parenthetical) (Details)	Dec. 31, 2021Land
Land Held For Development [Member]
Variable Interest Entity [Line Items]
Number of land parcel subject to long-term ground lease	1

Investments in Partially Owne_9

Investments in Partially Owned Entities - Consolidated Variable Interest Entities ("VIEs") - Additional Information (Details)	Dec. 31, 2021JointVenture
Toll Brothers, Inc. (“Toll”)
Variable Interest Entity [Line Items]
Number of separate joint venture agreements under the commitment agreement	3

Investments in Partially Own_10

Investments in Partially Owned Entities - Summary of Information on Total Unconsolidated Development Joint Ventures Entered (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)JointVenture
Variable Interest Entity [Line Items]
EQR's investments in unconsolidated entities – acquisitions	$ 48,534
Unconsolidated VIE [Member]
Variable Interest Entity [Line Items]
Number of unconsolidated joint ventures | JointVenture	6
Unconsolidated VIE [Member] | Equity Residential [Member]
Variable Interest Entity [Line Items]
EQR's investments in unconsolidated entities – acquisitions	$ 48,534

Investments in Partially Own_11

Investments in Partially Owned Entities - Summary of Information on Total Unconsolidated Development Joint Ventures Entered (Parenthetical) (Details)	Dec. 31, 2021Land
Unconsolidated VIE [Member]
Variable Interest Entity [Line Items]
Number of land parcel subject to long-term ground lease	1

Restricted Deposits - Restricte

Restricted Deposits - Restricted Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Mortgage escrow deposits:
Replacement reserves	$ 11,156	$ 9,877
Mortgage principal reserves/sinking funds	19,104	14,168
Mortgage escrow deposits	30,260	24,045
Restricted cash:
Tax-deferred (1031) exchange proceeds	166,362
Earnest money on pending acquisitions	2,000
Restricted deposits on real estate investments	284	307
Resident security and utility deposits	35,663	31,412
Other	1,835	1,373
Restricted cash	206,144	33,092
Restricted deposits	$ 236,404	$ 57,137	$ 71,246

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)PropertyCorporateOfficeLease	Dec. 31, 2020USD ($)	Dec. 31, 2019
Operating Leased Assets [Line Items]
Increase (decrease) in lease liabilities	$ 11.3
Increase (decrease) in ROU assets	$ 11.3
Corporate Office Leases [Member]
Operating Leased Assets [Line Items]
Number of operating leases | CorporateOfficeLease	8
Ground Leases [Member]
Operating Leased Assets [Line Items]
Number of operating properties | Property	15
COVID-19 [Member]
Operating Leased Assets [Line Items]
Write-off of straight-line rent receivables	$ 0.8	$ 13.2
Decrease in rental revenues	$ 7.5	$ 7.3
Maximum [Member] | Corporate Office Leases [Member]
Operating Leased Assets [Line Items]
Lease expiration dates (inclusive of applicable extension options)	2042
Maximum [Member] | Ground Leases [Member]
Operating Leased Assets [Line Items]
Operating lease expiration year	2118
Minimum [Member] | Corporate Office Leases [Member]
Operating Leased Assets [Line Items]
Lease expiration dates (inclusive of applicable extension options)	2022
Minimum [Member] | Ground Leases [Member]
Operating Leased Assets [Line Items]
Operating lease expiration year	2042
Residential Apartment Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	97.00%	98.00%	97.00%
Residential Apartment Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	12 months
Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	3.00%	2.00%	3.00%
Non-residential Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	10 years
Non-residential Leases [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Retail leases term	5 years

Leases - Summary of Lease Incom

Leases - Summary of Lease Income Types Relating to Lease Payments Along With the Total Other Rental Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Total lease revenue	$ 2,364,447	$ 2,464,790	$ 2,593,829
Rental income	2,463,997	2,571,705	2,700,691
Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	2,298,099	2,417,557	2,521,396
Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	66,348	47,233	72,433
Residential and Non-Residential Rent [Member]
Operating Leased Assets [Line Items]
Total lease revenue	2,261,019	2,388,441	2,486,189
Residential and Non-Residential Rent [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	2,199,986	2,336,778	2,414,201
Residential and Non-Residential Rent [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	61,033	51,663	71,988
Utility Recoveries (RUBS Income) [Member]
Operating Leased Assets [Line Items]
Total lease revenue	75,569	71,376	68,576
Utility Recoveries (RUBS Income) [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	74,846	70,699	67,659
Utility Recoveries (RUBS Income) [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	723	677	917
Parking Rent [Member]
Operating Leased Assets [Line Items]
Total lease revenue	41,499	39,155	37,905
Parking Rent [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	40,934	38,743	37,557
Parking Rent [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	565	412	348
Other Lease Revenue [Member]
Operating Leased Assets [Line Items]
Total lease revenue	(13,640)	(34,182)	1,159
Other Lease Revenue [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	(17,667)	(28,663)	1,979
Other Lease Revenue [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	4,027	(5,519)	(820)
Parking Revenue [Member]
Operating Leased Assets [Line Items]
Rental income	26,789	22,210	28,272
Other Revenue [Member]
Operating Leased Assets [Line Items]
Rental income	72,761	84,705	78,590
Other Rental Income [Member]
Operating Leased Assets [Line Items]
Rental income	$ 99,550	$ 106,915	$ 106,862

Leases - Summary of Residential

Leases - Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances (Details) - Other Assets [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Residential Leases [Member]
Operating Leased Assets [Line Items]
Resident/tenant accounts receivable balances	$ 37,959	$ 30,856
Allowance for doubtful accounts	(33,121)	(24,021)
Net receivable balances	4,838	6,835
Straight-line receivable balances	7,460	19,992
Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Resident/tenant accounts receivable balances	3,218	7,598
Allowance for doubtful accounts	(2,365)	(6,527)
Net receivable balances	853	1,071
Straight-line receivable balances	$ 13,021	$ 13,413

Leases - Summary of Residenti_2

Leases - Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances (Parenthetical) (Details)	Dec. 31, 2021
Leases [Abstract]
Holding percentage of residential security deposits of net receivable	48.20%

Leases - Summary of Residenti_3

Leases - Summary of Residential Bad Debt for Company's Properties (Details) - Residential Leases [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessor Lease Description [Line Items]
Bad debt, net	$ 31,485	$ 42,505	$ 12,067
% of rental income	1.30%	1.70%	0.50%

Leases - Summary of Residenti_4

Leases - Summary of Residential Bad Debt for Company's Properties (Parenthetical) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Leases [Abstract]
Bad debt, net from resident payments	$ 34.8

Leases - Summary of Right-of-Us

Leases - Summary of Right-of-Use Assets and Related Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Leased Assets [Line Items]
Right-of-use assets	$ 474,713	$ 499,287
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets [Member]	Other Assets [Member]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets [Member]	Other Assets [Member]
Lease liabilities	$ 312,335	$ 329,130
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	us-gaap:OtherLiabilitiesMember	us-gaap:OtherLiabilitiesMember
Corporate Office Leases [Member]
Operating Leased Assets [Line Items]
Right-of-use assets	$ 36,897	$ 39,203
Lease liabilities	37,760	40,470
Ground Leases [Member]
Operating Leased Assets [Line Items]
Right-of-use assets	340,241	402,500
Finance lease, right-of-use asset	97,575	57,584
Lease liabilities	205,096	265,310
Finance lease, liabilities	$ 69,479	$ 23,350

Leases - Summary of Quantitativ

Leases - Summary of Quantitative Disclosures for Lessees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease cost:
Amortization of right-of-use assets (capitalized)	$ 351
Amortization of right-of-use assets (expensed)	1,391
Interest on lease liabilities (capitalized)	452	$ 1,029	$ 225
Interest on lease liabilities (expensed)	1,464
Total lease cost	29,587	31,489	31,549
Cash paid for amounts included in the measurement of lease liabilities:
Investing cash flows from finance leases	383	$ 567	188
Financing cash flows from finance leases	$ 1,898		34,734
ROU assets obtained in exchange for new finance lease liabilities			$ 23,201
Weighted-average remaining lease term – finance leases	25 years 2 months 12 days	18 years 8 months 12 days	19 years 8 months 12 days
Weighted-average discount rate – finance leases	2.80%	3.00%	3.00%
Corporate Office Leases [Member]
Lease cost:
Operating lease cost	$ 3,581	$ 3,747	$ 3,937
Variable lease cost	1,037	1,307	1,489
Cash paid for amounts included in the measurement of lease liabilities:
Corporate office leases	$ 5,016	$ 5,296	5,494
ROU assets obtained in exchange for new operating lease liabilities:			$ 44,298
Weighted-average remaining lease term – operating leases	16 years 9 months 18 days	17 years 4 months 24 days	18 years 1 month 6 days
Weighted-average discount rate – operating leases:	3.20%	3.20%	3.20%
Ground Leases [Member]
Lease cost:
Operating lease cost	$ 18,338	$ 22,102	$ 22,198
Variable lease cost	2,973	3,304	3,700
Cash paid for amounts included in the measurement of lease liabilities:
Corporate office leases	$ 14,682	$ 16,552	16,837
ROU assets obtained in exchange for new operating lease liabilities:			$ 422,018
Weighted-average remaining lease term – operating leases	61 years 9 months 18 days	55 years 3 months 18 days	56 years 2 months 12 days
Weighted-average discount rate – operating leases:	5.10%	5.00%	5.00%

Leases - Summary of Undiscounte

Leases - Summary of Undiscounted Cash Flows for Contractual Obligations for Minimum Rent Payments/Receipts (Details) $ in Thousands	Dec. 31, 2021USD ($)
Leases [Abstract]
2022	$ (2,463)
2023	(2,662)
2024	(2,880)
2025	(2,946)
2026	(2,959)
Thereafter	(88,209)
Total	(102,119)
2022	(15,090)
2023	(14,998)
2024	(15,131)
2025	(14,957)
2026	(14,843)
Thereafter	(831,456)
Total	(906,475)
2022	58,561
2023	56,754
2024	51,295
2025	45,091
2026	37,283
Thereafter	135,922
Total	$ 384,906

Leases - Summary of Reconciliat

Leases - Summary of Reconciliation of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2021USD ($)
Leases [Abstract]
Total minimum rent payments	$ 1,008,594
Less: Lease discount	(696,259)
Lease liabilities	$ 312,335

Debt - Mortgage Notes Payable -

Debt - Mortgage Notes Payable - Summary of Mortgage Notes Payable Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Mortgage notes payable, net	$ 2,293,890	$ 1,941,610
Proceeds	58,428	519,204	$ 295,771
Lump sum payoffs	(156,815)	(160,522)	(743,021)
Scheduled principal repayments	(7,465)	(7,759)
Amortization of premiums/ discounts	2,764	2,234	8,618
Amortization of deferred financing costs, net	399	(877)
Mortgage notes payable, net	2,191,201	2,293,890	1,941,610
Fixed Rate Debt [Member] | Secured Conventional [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net	1,901,091	1,574,699
Proceeds	28,500	495,000
Lump sum payoffs	(28,200)	(160,522)
Scheduled principal repayments	(7,465)	(7,759)
Amortization of premiums/ discounts	1,522	988
Amortization of deferred financing costs, net	1,024	(1,315)
Mortgage notes payable, net	1,896,472	1,901,091	1,574,699
Floating Rate Debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net	392,799	366,911
Proceeds	29,928	24,204
Lump sum payoffs	(128,615)
Amortization of premiums/ discounts	1,242	1,246
Amortization of deferred financing costs, net	(625)	438
Mortgage notes payable, net	294,729	392,799	366,911
Floating Rate Debt [Member] | Secured Conventional [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net	31,494	7,050
Proceeds	29,928	24,204
Amortization of deferred financing costs, net	(1,532)	240
Mortgage notes payable, net	59,890	31,494	7,050
Floating Rate Debt [Member] | Secured Tax Exempt [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net	361,305	359,861
Lump sum payoffs	(128,615)
Amortization of premiums/ discounts	1,242	1,246
Amortization of deferred financing costs, net	907	198
Mortgage notes payable, net	$ 234,839	$ 361,305	$ 359,861

Debt - Mortgage Notes Payable_2

Debt - Mortgage Notes Payable - Summary of Mortgage Notes Payable Activity (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt instrument, maturity date		Nov. 1, 2024
Mortgages [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.58%
Debt instrument, maturity date	Mar. 1, 2031
Variable Rate Construction Mortgage [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date	Jun. 25, 2022	Jun. 25, 2022
Debt instrument face amount	$ 67,600,000	$ 67,600,000
Mortgages [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		2.60%
Debt instrument, maturity date		May 1, 2030

Debt - Mortgage Notes Payable_3

Debt - Mortgage Notes Payable - Summary of Certain Interest Rate and Maturity Date Information (Details) - Mortgages [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Interest Rate Ranges	3.58%
Weighted Average Interest Rate	3.18%	3.33%
Maturity Date Ranges, Start	2022	2021
Maturity Date Ranges, End	2061	2061
Minimum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	0.06%	0.06%
Maximum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	4.21%	4.71%

Debt - Mortgage Notes Payable_4

Debt - Mortgage Notes Payable - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Mortgage notes payable, net	$ 2,191,201	$ 2,293,890	$ 1,941,610
Historical cost, net of accumulated depreciation, of encumbered properties	2,700,000	2,900,000
Credit Enhanced Debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable, net	$ 250,000	$ 281,700

Debt - Notes - Summary of Notes

Debt - Notes - Summary of Notes Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Notes, net beginning balance	$ 5,335,536
Proceeds	497,470		$ 1,194,468
Lump sum payoffs		$ (750,000)	(1,050,000)
Amortization of premiums/ discounts	2,538	2,997	3,162
Notes, net ending balance	5,835,222	5,335,536
Fixed Rate Debt [Member] | Unsecured Public [Member]
Debt Instrument [Line Items]
Notes, net beginning balance	5,335,536	6,077,513
Proceeds	497,470
Lump sum payoffs		(750,000)
Amortization of premiums/ discounts	2,538	2,997
Amortization of deferred financing costs, net	(322)	5,026
Notes, net ending balance	$ 5,835,222	$ 5,335,536	$ 6,077,513

Debt - Notes - Summary of Not_2

Debt - Notes - Summary of Notes Activity (Parenthetical) (Details) - 1.85% Notes [Member] $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of unsecured debt	$ 500
Debt instrument, interest rate, stated percentage	1.85%

Debt - Notes - Summary of Certa

Debt - Notes - Summary of Certain Interest Rate and Maturity Date Information (Details) - Notes [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.65%	4.03%
Maturity Date Ranges, Start	2023
Maturity Date Ranges, End		2047
Minimum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	1.85%	2.50%
Maximum [Member]
Debt Instrument [Line Items]
Interest Rate Ranges	7.57%	7.57%

Debt - Notes - Additional Infor

Debt - Notes - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Shelf registration statement effective date	2019-06
Shelf registration statement expiry date	2022-06

Debt - Line of Credit and Comme

Debt - Line of Credit and Commercial Paper - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Nov. 03, 2019
Line of Credit Facility [Line Items]
Debt instrument, maturity date		Nov. 1, 2024
Commercial paper maximum available	$ 1,000,000,000		$ 1,000,000,000
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Weighted average interest rates	0.27%	1.72%
Weighted average amount outstanding	$ 471,000,000	$ 276,600,000
Commercial paper weighted average days outstanding	27 days	45 days
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	$ 2,500,000,000	$ 2,500,000,000
Ability to increase LOC facility		$ 750,000,000
Debt instrument, basis spread on variable rate		0.775%
Percentage points of line of credit facility commitment fee		0.125%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Weighted average interest rates	0.88%	1.47%

Debt - Line of Credit and Com_2

Debt - Line of Credit and Commercial Paper - Schedule of Unsecured Revolving Credit Facility (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Commercial paper balance outstanding	$ (315,100,000)
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility commitment	2,500,000,000	$ 2,500,000,000
Commercial paper balance outstanding	(315,121,000)	(415,000,000)
Other restricted amounts	(3,507,000)	(100,949,000)
Unsecured revolving credit facility availability	$ 2,181,372,000	$ 1,984,051,000

Debt - Other - Summary of Debt

Debt - Other - Summary of Debt Extinguishment Costs Recorded as Additional Interest Expense (Details) - Other [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Extinguishment Of Debt [Line Items]
Prepayment premiums/penalties		$ 26,150	$ 13,647
Write-offs of unamortized deferred financing costs	$ 744	634	3,148
Write-offs of unamortized (premiums)/discounts/OCI		12,508	7,196
Total	$ 744	$ 39,292	$ 23,991

Debt - Summary of Aggregate Pay

Debt - Summary of Aggregate Payments of Principal on All Debt (Details) $ in Thousands	Dec. 31, 2021USD ($)
Debt Disclosure [Abstract]
2022	$ 641,089
2023	1,329,088
2024	6,100
2025	458,200
2026	601,025
Thereafter	5,385,670
Subtotal	8,421,172
Deferred Financing Costs and Unamortized (Discount)	(79,719)
Total	$ 8,341,453

Debt - Summary of Aggregate P_2

Debt - Summary of Aggregate Payments of Principal on All Debt (Parenthetical) (Details) $ in Millions	Dec. 31, 2021USD ($)
Debt Disclosure [Abstract]
Commercial paper balance outstanding	$ 315.1

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details)	1 Months Ended			12 Months Ended
	Apr. 30, 2020USD ($)DerivativeInstrument	Jul. 31, 2019USD ($)DerivativeInstrument	Jun. 30, 2019USD ($)DerivativeInstrument	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Derivative [Line Items]
Net gain on sale of investments				$ 23,400,000
Investment securities outstanding				0
Unrealized gain (loss) on interest rate cash flow hedges, pretax, accumulated other comprehensive income (loss)				34,300,000	$ 43,700,000
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net				$ 10,600,000
Number of interest rate swaps matured | DerivativeInstrument		6
Repayments of unsecured debt					$ 750,000,000	$ 1,050,000,000
Forward Starting Swaps [Member]
Derivative [Line Items]
Payments for settlement of derivative instruments	$ 1,200,000
Forward starting swaps settled | DerivativeInstrument	2		10
Debt instrument face amount			$ 600,000,000
Increase (decrease) in charges hedge termination activities	$ 1,200,000		41,600,000
Mortgage notes period	5 years
Proceeds from settlement of derivative instruments			41,800,000
Interest expense			$ 200,000
Debt instrument, term			10 years
2.375% Notes [Member]
Derivative [Line Items]
Repayments of unsecured debt		$ 450,000,000
Debt instrument, interest rate, stated percentage		2.375%
Mortgages [Member]
Derivative [Line Items]
Debt instrument, interest rate, stated percentage				3.58%
Mortgages [Member] | Forward Starting Swaps [Member]
Derivative [Line Items]
Debt instrument face amount	$ 495,000,000
Secured conventional mortgage notes period	10 years

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Valuations for Each Type of Fair Value Measurement (Details)	12 Months Ended
	Dec. 31, 2021
Employee Holdings Within The Supplemental Executive Retirement Plan
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Employee holdings (other than Common Shares) within the supplemental executive retirement plan (the “SERP”)
Valuation Inputs	Quoted market prices for identical assets. These holdings are included in other assets and other liabilities on the consolidated balance sheets.
Redeemable Noncontrolling Interests Operating Partnership Redeemable Limited Partners
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners
Valuation Inputs	Quoted market price of Common Shares.
Mortgage Notes Payable And Private Unsecured Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Mortgage notes payable and private unsecured debt (including its commercial paper and line of credit, if applicable)
Valuation Inputs	Indicative rates provided by lenders of similar loans.
Public Unsecured Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Type	Public unsecured notes
Valuation Inputs	Quoted market prices for each underlying issuance.

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	$ 8,341,453	$ 8,044,256
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	8,991,998	8,999,875
Mortgage Notes Payable, Net [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	2,191,201	2,293,890
Mortgage Notes Payable, Net [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	2,193,689	2,313,263
Unsecured Debt [Member] | Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	6,150,252	5,750,366
Unsecured Debt [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total debt, net	$ 6,798,309	$ 6,686,612

Fair Value Measurements - Sum_3

Fair Value Measurements - Summary of Fair Value Measurements for Each Major Category of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	$ 164,650	$ 160,293
Other Liabilities, Fair Value Disclosure	164,650	160,293
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	498,977	338,951	$ 463,400	$ 379,106
Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	164,650	160,293
Other Liabilities, Fair Value Disclosure	164,650	160,293
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	0	0
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	0	0
Other Liabilities, Fair Value Disclosure	0	0
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	498,977	338,951
Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of SERP Investments	0	0
Other Liabilities, Fair Value Disclosure	0	0
Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners	$ 0	$ 0

Fair Value Measurements - Sum_4

Fair Value Measurements - Summary of Effect of Fair Value Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	$ 2,277
Amount of Gain/(Loss) Recognized in Income on Hedged Item	(2,277)
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	2,277
Amount of Gain/(Loss) Recognized in Income on Hedged Item	$ (2,277)

Fair Value Measurements - Sum_5

Fair Value Measurements - Summary of Effect of Cash Flow Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI on Derivative		$ (1,190)	$ (33,765)
Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	$ (9,394)	(35,087)	(21,188)
Forward Starting Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI on Derivative		(1,190)	(33,765)
Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income	$ (9,394)	$ (35,087)	$ (21,188)

Earnings Per Share and Earnin_3

Earnings Per Share and Earnings Per Unit - Computation of Net Income per Share Basic and Net Income per Share Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Allocation to Noncontrolling Interests – Operating Partnership	(45,900)	(34,010)	(36,034)
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(17,964)	(14,855)	(3,297)
Preferred distributions	(3,090)	(3,090)	(3,090)
Net income available to Common Shares	1,329,760	910,546	967,287
Numerator for net income per share – diluted	$ 1,375,660	$ 944,556	$ 1,003,321
Weighted average Common Shares outstanding	373,833	371,791	370,461
OP Units	12,263	13,003	12,907
Dilutive Securities Options	1,924	1,080	2,965
ATM forward sales	69
Denominator for net income per share – diluted	388,089	385,874	386,333
Net income per share – basic	$ 3.56	$ 2.45	$ 2.61
Net income per share – diluted	$ 3.54	$ 2.45	$ 2.60

Earnings Per Share and Earnin_4

Earnings Per Share and Earnings Per Unit - Computation of Net Income per Unit Basic and Net Income per Unit Diluted for Operating Partnership (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	$ (17,964)	$ (14,855)	$ (3,297)
Dilutive Securities Options	1,924	1,080	2,965
ATM forward sales	69
Denominator for net income per share – diluted	388,089	385,874	386,333
Net income per Unit – basic	$ 3.56	$ 2.45	$ 2.61
Net income per Unit – diluted	$ 3.54	$ 2.45	$ 2.60
ERPOP [Member]
Net income	$ 1,396,714	$ 962,501	$ 1,009,708
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties	(17,964)	(14,855)	(3,297)
Allocation to Preference Units	(3,090)	(3,090)	(3,090)
Numerator for net income per Unit – basic and diluted	$ 1,375,660	$ 944,556	$ 1,003,321
Denominator for net income per Unit – basic	386,096	384,794	383,368
Dilutive Securities Options	1,924	1,080	2,965
ATM forward sales	69
Denominator for net income per share – diluted	388,089	385,874	386,333
Net income per Unit – basic	$ 3.56	$ 2.45	$ 2.61
Net income per Unit – diluted	$ 3.54	$ 2.45	$ 2.60

Share Incentive Plans - Additio

Share Incentive Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant	9,539,478
Individual potential target award minimum	0.00%
Individual potential target award maximum	200.00%
Percent of award target performance metric	50.00%
Percentage of distribution payments	10.00%
Compensation information
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 8.6
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	1 year 4 months 13 days
Share-based compensation arrangement by share-based payment award, options, exercisable, number		4,985,668	4,750,481
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average exercise price		$ 55.12	$ 54.13
Stock Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized	11,331,958

Share Incentive Plans - Summary

Share Incentive Plans - Summary of Terms of Awards Generally Granted to Employees (Details)	12 Months Ended
	Dec. 31, 2021
Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Overview	Options exercised after vesting result in issuance of new Common Shares.
Grant/Exercise Price	Granted at the fair market value of Common Shares as of the grant date.
Vesting Period	3 years
Expiration	10 years
Upon Employee Termination	Unvested options are canceled.
Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Overview	Restricted shareholders generally have the same voting rights and receive quarterly dividend payments on their shares at the same rate and on the same date as any other Common Share holder (1).
Grant/Exercise Price	Granted at the fair market value of Common Shares as of the grant date.
Vesting Period	3 years
Upon Employee Termination	Unvested restricted shares are canceled.
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Overview	When certain conditions are met, restricted units convert into an equal number of OP Units, which the holder may exchange for Common Shares on a one-for-one basis or at the option of the Company the cash value of such shares. Restricted unitholders receive quarterly distribution payments on their restricted units at the same rate and on the same date as any other OP Unit holder (1).
Grant/Exercise Price	Granted at varying discount rates to the fair market value of Common Shares as of the grant date (2).
Vesting Period	3 years
Expiration	10 years
Upon Employee Termination	Unvested restricted units are canceled.

Share Incentive Plans - Summa_2

Share Incentive Plans - Summary of Valuation Method of Share Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	21.30%	15.20%	16.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	5 years	5 years	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	3.23%	3.04%	3.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.50%	1.32%	2.43%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price	$ 67.48	$ 83.08	$ 72.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 7.96	$ 7.23	$ 8.06

Share Incentive Plans - Summa_3

Share Incentive Plans - Summary of Valuation Method of Share Options (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract]
Historical period of estimated volatility	5 years

Share Incentive Plans - Summa_4

Share Incentive Plans - Summary of Weighted Average Fair Value for Each Restricted Share/Unit (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average fair value per restricted share	$ 70.46	$ 77.44	$ 73.96
LTI Awards [Member] | Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average fair value per restricted share	61.73	75.89	65.36
LTI Awards [Member] | Restricted Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average fair value per restricted share	$ 59.82	$ 72.69	$ 63.12

Share Incentive Plans - Summa_5

Share Incentive Plans - Summary of Terms of Each Retirement Eligibility Category (Details)	12 Months Ended
	Dec. 31, 2021
Age 62 for Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Eligibility	For employees hired prior to January 1, 2009 and who were age 59 or older as of February 1, 2019.
Effect on unvested restricted shares, restricted units and Options	Awards immediately vest and Options continue to be exercisable for the balance of the applicable ten-year option period.
Effect on LTI Plan	Awards are prorated in proportion to the number of days worked in the first year of the three-year performance period and the individual does not receive any payout of shares or units until the final payout is determined at the end of the three-year performance period.
Rule of 70 for Employees [Member]
Defined Benefit Plan Disclosure [Line Items]
Eligibility	All employees (1).
Effect on unvested restricted shares, restricted units and Options	Awards continue to vest per the original vesting schedule, subject to certain conditions, and Options continue to be exercisable for the balance of the applicable ten-year option period.
Effect on LTI Plan	Awards are prorated in proportion to the number of days worked in the first year of the three-year performance period and the individual does not receive any payout of shares or units until the final payout is determined at the end of the three-year performance period.
Age 72 for Trustees [Member]
Defined Benefit Plan Disclosure [Line Items]
Eligibility	All non-employee Trustees.
Effect on unvested restricted shares, restricted units and Options	Awards immediately vest and Options continue to be exercisable for the balance of the applicable ten-year option period.
Effect on LTI Plan	Awards are prorated in proportion to the number of days worked in the first year of the three-year performance period and the individual does not receive any payout of shares or units until the final payout is determined at the end of the three-year performance period.

Share Incentive Plans - Schedul

Share Incentive Plans - Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Compensation information
Compensation Expense	$ 27,810	$ 23,174	$ 24,449
Compensation Capitalized	1,430	1,527	1,450
Restricted Units In-Lieu of Bonus	1,038	1,743	3,266
Compensation Equity	30,278	26,444	29,165
Dividends Incurred	2,015	3,027	1,804
Restricted Shares [Member]
Compensation information
Compensation Expense	7,258	10,053	11,522
Compensation Capitalized	1,131	1,172	916
Restricted Units In-Lieu of Bonus	0	0	0
Compensation Equity	8,389	11,225	12,438
Dividends Incurred	761	1,172	979
Restricted Stock Units (RSUs) [Member]
Compensation information
Compensation Expense	16,689	10,103	9,905
Compensation Capitalized	70	80	240
Restricted Units In-Lieu of Bonus	1,038	1,743	3,265
Compensation Equity	17,797	11,926	13,410
Dividends Incurred	1,254	1,855	825
Options [Member]
Compensation information
Compensation Expense	2,980	2,156	2,420
Compensation Capitalized	121	193	254
Restricted Units In-Lieu of Bonus	0	0	1
Compensation Equity	3,101	2,349	2,675
Dividends Incurred	0	0	0
Employee Share Purchase Plan Discount [Member]
Compensation information
Compensation Expense	883	862	602
Compensation Capitalized	108	82	40
Restricted Units In-Lieu of Bonus	0	0	0
Compensation Equity	991	944	642
Dividends Incurred	$ 0	$ 0	$ 0

Share Incentive Plans - Award A

Share Incentive Plans - Award Activity of the Share Incentive Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Common Shares Subject to Options, Awards exercised/vested	(1,710,692)	(239,695)	(1,745,050)
Employee Stock Option [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Common Shares Subject to Options, Beginning Balance	5,642,752	5,567,544	7,112,235
Common Shares Subject to Options, Awards granted	489,853	317,731	234,147
Common Shares Subject to Options, Awards exercised/vested	(1,710,692)	(239,695)	(1,745,050)
Common Shares Subject to Options, Awards forfeited	(23,317)	(1,344)	(30,489)
Common Shares Subject to Options, Awards expired	(10,763)	(1,484)	(3,299)
Common Shares Subject to Options, Ending Balance	4,387,833	5,642,752	5,567,544
Weighted Average Exercise Price per Option, Beginning Balance	$ 56.91	$ 55.52	$ 52.35
Weighted Average Exercise Price per Option, Awards granted	67.58	76.26	72.10
Weighted Average Exercise Price per Option, Awards exercised/vested	50.09	50.31	44.72
Weighted Average Exercise Price per Option, Awards forfeited	73.33	72.69	61.92
Weighted Average Exercise Price per Option, Awards expired	68	47.18	40.39
Weighted Average Exercise Price per Option, Ending Balance	$ 60.65	$ 56.91	$ 55.52
Restricted Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Restricted Shares, Beginning Balance	353,634	306,706	299,425
Restricted Shares, Awards granted	96,224	179,911	163,799
Restricted Shares, Awards exercised/vested	(133,351)	(131,792)	(151,321)
Restricted Shares, Awards forfeited	(6,631)	(1,191)	(5,197)
Restricted Shares, Awards Expired	0	0	0
Restricted Shares, Ending Balance	309,876	353,634	306,706
Weighted Average Fair Value per Restricted Share, Beginning Balance	$ 71.81	$ 66.15	$ 66.52
Weighted Average Fair Value per Restricted Share, Awards granted	70.46	77.44	73.96
Weighted Average Fair Value per Restricted Share, Awards exercised/vested	62.89	66.32	75.41
Weighted Average Fair Value per Restricted Share, Awards forfeited	74.31	73.45	65.35
Weighted Average Fair Value per Restricted Share, Awards Expired	0	0	0
Weighted Average Fair Value per Restricted Share, Ending Balance	$ 75.17	$ 71.81	$ 66.15
Restricted Units [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Restricted Units, Beginning Balance	879,800	858,284	1,139,848
Restricted Units, Awards Granted	190,742	249,263	141,772
Restricted Units, Awards exercised/vested	(181,531)	(227,747)	(422,784)
Restricted Units, Awards forfeited	(35,580)	0	(552)
Restricted Units, Awards Expired	0	0	0
Restricted Units, Ending Balance	853,431	879,800	858,284
Weighted Average Fair Value per Restricted Unit, Beginning Balance	$ 66.78	$ 64.95	$ 71.07
Weighted Average Fair Value per Restricted Unit, Awards granted	60.71	72	67.22
Weighted Average Fair Value per Restricted Unit, Awards exercised/vested	62.01	68.47	70.77
Weighted Average Fair Value per Restricted Unit, Awards forfeited	59.82	0	69.43
Weighted Average Fair Value per Restricted Unit, Awards Expired	0	0	0
Weighted Average Fair Value per Restricted Unit, Ending Balance	$ 66.11	$ 66.78	$ 64.95

Share Incentive Plans - Award_2

Share Incentive Plans - Award Activity of Stock Options, Restricted Shares and Restricted Units (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted average grant date fair value per share for Options granted	$ 7.96	$ 7.23	$ 8.06
Employee Stock Option [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted average grant date fair value per share for Options granted	$ 7.98	$ 6.74	$ 8.05
Aggregate intrinsic value of Options exercised	$ 47,413	$ 7,569	$ 58,066
Restricted Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	9,222	10,559	11,133
Restricted Units [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	$ 12,468	$ 18,711	$ 29,149

Share Incentive Plans - Informa

Share Incentive Plans - Information Regarding Options Outstanding and Exercisable (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)$ / sharesshares
Share Based Compensation [Abstract]
Options Outstanding, Options | shares	4,387,833
Options Exercisable, Options | shares	3,710,888
Options, Vested and expected to vest | shares	666,334
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 4 months 13 days
Options Exercisable, Weighted Average Remaining Contractual Life in Years	4 years 9 months 3 days
Options Vested and expected to vest, Weighted Average Remaining Contractual Life in Years	8 years 8 months 15 days
Options Outstanding, Weighted Average Exercise Price | $ / shares	$ 60.65
Options Exercisable, Weighted Average Exercise Price | $ / shares	58.70
Vested and expected to vest, Weighted Average Exercise Price | $ / shares	$ 71.33
Options Outstanding, Aggregate Intrinsic Value | $	$ 130,999
Options Exercisable, Aggregate Intrinsic Value | $	118,015
Vested and expected to vest, Aggregate Intrinsic Value | $	$ 12,775

Share Incentive Plans - Infor_2

Share Incentive Plans - Information Regarding Options Outstanding and Exercisable (Parenthetical) (Details)	Dec. 31, 2021$ / shares
Share Based Compensation [Abstract]
Market value of common shares	$ 90.50

Employee Plans - Additional Inf

Employee Plans - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Value of common shares that can be acquired by the employee and trustees under employees share purchase plan	$ 100,000
Number of common shares authorized after amendment	7,000,000
Common Shares available for purchase under the ESPP	2,553,434
Purchase price of common stock	85.00%
Maximum eligible compensation percentage for the defined contribution plan (the 401(k) Plan)	4.00%
Defined contribution plan vesting period	5 years
Defined contribution plan, compensation expense	$ 4,900,000	$ 5,200,000	$ 5,000,000
Highly Compensated Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum eligible compensation percentage for the defined contribution plan (the 401(k) Plan)	3.00%

Employee Plans - Summary of Inf

Employee Plans - Summary of Information Regarding the Common Shares Issued Under the ESPP (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Service Share Based Compensation Aggregate Disclosures [Abstract]
Shares issued	70,702	90,196	48,131
Issuance price ranges, Minimum	$ 53.13	$ 46.23	$ 59.56
Issuance price ranges, Maximum	$ 71.04	$ 63.84	$ 72.91
Issuance proceeds	$ 4,265	$ 4,508	$ 3,116

Distribution Reinvestment Plan

Distribution Reinvestment Plan - Additional Information (Details) - shares	Dec. 31, 2021	Sep. 30, 2014
Distribution Reinvestment And Share Purchase Plan [Abstract]
Common shares registered with distribution reinvestment and share purchase Plan (2014 DRIP)		4,790,000
Number of shares available for issuance	4,640,684

Transactions with Related Par_2

Transactions with Related Parties - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Lease expiration date	Nov. 30, 2032
Lease extension options	two five-year
Amount incurred for leased office space	$ 1.7	$ 2.1	$ 2.6

Commitments and Contingencies -

Commitments and Contingencies - Summary of Joint Venture and Real Estate Technology Fund Commitments (Details) $ in Thousands	Dec. 31, 2021USD ($)ProjectApartment
Projects Under Development Consolidated [Member]
Projects/Investments/Units/Remaining Commitments schedule
Number of consolidated projects in various stages of development | Project	1
Apartment Units | Apartment	312
Consolidated project under development commitment fund | $	$ 83,720
Projects Under Development Unconsolidated [Member]
Projects/Investments/Units/Remaining Commitments schedule
Number of unconsolidated projects in various stages of development | Project	3
Apartment Units | Apartment	929
Unconsolidated project under development commitment fund | $	$ 264,290
Projects Under Development [Member]
Projects/Investments/Units/Remaining Commitments schedule
Number of projects in various stages of development | Project	4
Apartment Units | Apartment	1,241
Project under development commitment fund | $	$ 348,010
Real Estate Technology Investments
Projects/Investments/Units/Remaining Commitments schedule
Number of real estate technology investments | Project	9
Real estate technology investments commitment fund | $	$ 30,947

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)Agreement	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Commitments And Contingencies [Line Items]
Equity method investment period	3 years
Percentage of expected non-recourse construction debt	60.00%
Initial minimum co-investment of combined equity | $	$ 750
Number of joint venture agreements | Agreement	3
Compensation expense, recognized | $	$ 0.1	$ 0.5	$ 0.4
Number of deferred compensation agreement with former executive officer | Agreement	1
Equity Residential [Member]
Commitments And Contingencies [Line Items]
Ownership Percentage	75.00%
Toll Brothers Inc. [Member]
Commitments And Contingencies [Line Items]
Ownership Percentage	25.00%

Commitments and Contingencies_3

Commitments and Contingencies - Schedule of Contractual Obligations (Details) $ in Thousands	Dec. 31, 2021USD ($)
Other Long-Term Liabilities:
Deferred Compensation Due, Year 1	$ (773)
Deferred Compensation Due, Year 2	(1,013)
Deferred Compensation Due, Year 3	(732)
Deferred Compensation Due, Year 4	(732)
Deferred Compensation Due, Year 5	(732)
Deferred Compensation Due, Thereafter	(4,023)
Deferred Compensation Due, Total	$ (8,005)

Reportable Segments - Additiona

Reportable Segments - Additional Information (Details) - Customer	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Number of customer contributed 10% or more of total revenue	0	0	0
Non-residential Leases [Member] | Revenue [Member] | Revenue Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	3.90%

Reportable Segments - Reconcili

Reportable Segments - Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	$ 2,463,997	$ 2,571,705	$ 2,700,691
Property and maintenance expense	(453,532)	(440,998)	(446,845)
Real estate taxes and insurance expense	(397,105)	(381,562)	(366,139)
Operating income	1,675,841	1,317,990	1,356,160
Same Store, Non-same Store and Other
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	2,463,997	2,571,705	2,700,691
Property and maintenance expense	(453,532)	(440,998)	(446,845)
Real estate taxes and insurance expense	(397,105)	(381,562)	(366,139)
Total operating expenses	(850,637)	(822,560)	(812,984)
Operating income	$ 1,613,360	$ 1,749,145	$ 1,887,707

Reportable Segments - NOI from

Reportable Segments - NOI from Our Rental Real Estate for Each Segment Specific to Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Rental income	$ 2,463,997	$ 2,571,705	$ 2,700,691
Operating income	1,675,841	1,317,990	1,356,160
Total Assets	21,169,241	20,286,891
Same Store
Segment Reporting Information [Line Items]
Rental income	2,342,257	2,425,025	2,519,235
Operating expenses	803,995	780,381	757,502
Operating income	1,538,262	1,644,644	1,761,733
Total Assets	17,810,840	18,433,017
Capital Expenditures	147,388	131,238
Non-same store/other
Segment Reporting Information [Line Items]
Rental income	121,740	146,680	181,456
Operating expenses	46,642	42,179	55,482
Operating income	75,098	104,501	125,974
Total Assets	3,358,401	1,853,874
Capital Expenditures	3,631	4,741
Same Store, Non-same Store and Other
Segment Reporting Information [Line Items]
Rental income	2,463,997	2,571,705	2,700,691
Operating expenses	850,637	822,560	812,984
Operating income	1,613,360	1,749,145	1,887,707
Total Assets	21,169,241	20,286,891
Capital Expenditures	151,019	135,979
Other markets | Same Store
Segment Reporting Information [Line Items]
Rental income	39,084	37,917	18,215
Operating expenses	11,209	11,040	4,713
Operating income	27,875	26,877	13,502
Los Angeles | Same Store
Segment Reporting Information [Line Items]
Rental income	447,094	444,129	485,084
Operating expenses	141,636	140,469	144,314
Operating income	305,458	303,660	340,770
Total Assets	2,792,948	2,905,404
Capital Expenditures	21,507	21,537
Subtotal - Southern California | Same Store
Segment Reporting Information [Line Items]
Rental income	635,230	624,102	663,869
Operating expenses	185,018	183,190	186,562
Operating income	450,212	440,912	477,307
Total Assets	3,396,356	3,536,840
Capital Expenditures	30,053	32,227
Orange County | Same Store
Segment Reporting Information [Line Items]
Rental income	109,427	105,236	105,087
Operating expenses	24,986	24,545	24,359
Operating income	84,441	80,691	80,728
Total Assets	371,063	389,007
Capital Expenditures	5,647	7,260
San Diego | Same Store
Segment Reporting Information [Line Items]
Rental income	78,709	74,737	73,698
Operating expenses	18,396	18,176	17,889
Operating income	60,313	56,561	55,809
Total Assets	232,345	242,429
Capital Expenditures	2,899	3,430
Washington D.C. | Same Store
Segment Reporting Information [Line Items]
Rental income	393,374	405,571	394,171
Operating expenses	130,445	125,353	119,419
Operating income	262,929	280,218	274,752
Total Assets	3,177,162	3,291,760
Capital Expenditures	27,148	23,637
New York | Same Store
Segment Reporting Information [Line Items]
Rental income	405,830	424,534	464,270
Operating expenses	202,954	197,740	191,514
Operating income	202,876	226,794	272,756
Total Assets	3,897,202	4,000,355
Capital Expenditures	29,623	25,716
San Francisco | Same Store
Segment Reporting Information [Line Items]
Rental income	391,022	435,371	473,102
Operating expenses	121,134	117,085	115,702
Operating income	269,888	318,286	357,400
Total Assets	3,195,089	3,310,083
Capital Expenditures	22,416	18,091
Boston | Same Store
Segment Reporting Information [Line Items]
Rental income	232,233	240,158	253,297
Operating expenses	75,698	71,611	70,875
Operating income	156,535	168,547	182,422
Total Assets	1,694,432	1,758,665
Capital Expenditures	21,095	18,367
Seattle | Same Store
Segment Reporting Information [Line Items]
Rental income	245,484	257,372	252,311
Operating expenses	77,537	74,362	68,717
Operating income	167,947	183,010	183,594
Total Assets	1,958,145	2,023,183
Capital Expenditures	15,038	11,621
Non-same store | Non-same store/other
Segment Reporting Information [Line Items]
Rental income	51,604	11,791	58,751
Operating expenses	21,296	2,706	17,702
Operating income	30,308	9,085	41,049
Total Assets	2,512,611	671,216
Capital Expenditures	1,704	73
Other [Member] | Non-same store/other
Segment Reporting Information [Line Items]
Rental income	70,136	134,889	122,705
Operating expenses	25,346	39,473	37,780
Operating income	44,790	95,416	$ 84,925
Total Assets	845,790	1,182,658
Capital Expenditures	1,927	4,668
Denver | Same Store
Segment Reporting Information [Line Items]
Total Assets	492,454	512,131
Capital Expenditures	$ 2,015	$ 1,579

Reportable Segments - NOI fro_2

Reportable Segments - NOI from Our Rental Real Estate for Each Segment Specific to Continuing Operations (Parenthetical) (Details) - Property	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Disclosure Of Entitys Reportable Segments [Abstract]
Units in same store properties	74,077	74,077	73,585

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) $ in Millions	Jan. 01, 2022USD ($)PropertyApartmentUnit	Dec. 31, 2021PropertyApartmentUnit	Dec. 31, 2020PropertyApartmentUnit
Subsequent Event [Line Items]
Properties acquired | Property		17	1
Property Units acquired | ApartmentUnit		4,747	158
Subsequent Events [Member]
Subsequent Event [Line Items]
Properties acquired | Property	1
Property Units acquired | ApartmentUnit	172
Purchase Price | $	$ 113

Schedule III - Real Estate an_2

Schedule III - Real Estate and Accumulated Depreciation-Overall Summary (Details)	Dec. 31, 2021USD ($)PropertyApartmentUnit	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Overall summary of real estate and accumulated depreciation
Investment in Real Estate, Gross	$ 28,272,906,000	$ 27,203,325,000	$ 27,533,607,000	$ 26,511,022,000
Accumulated Depreciation	$ (8,354,282,000)	$ (7,859,657,000)	$ (7,276,786,000)	$ (6,696,281,000)
Investment in Real Estate - Wholly Owned Unencumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	256
Units | ApartmentUnit	67,748
Investment in Real Estate, Gross	$ 23,852,899,270
Accumulated Depreciation	(7,039,743,046)
Investment in Real Estate, Net	16,813,156,224
Encumbrances	$ 0
Investment in Real Estate - Wholly Owned Encumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	38
Units | ApartmentUnit	9,113
Investment in Real Estate, Gross	$ 3,414,236,833
Accumulated Depreciation	(1,014,105,838)
Investment in Real Estate, Net	2,400,130,995
Encumbrances	$ 1,959,052,708
Wholly Owned Properties
Overall summary of real estate and accumulated depreciation
Properties | Property	294
Units | ApartmentUnit	76,861
Investment in Real Estate, Gross	$ 27,267,136,103
Accumulated Depreciation	(8,053,848,884)
Investment in Real Estate, Net	19,213,287,219
Encumbrances	$ 1,959,052,708
Investment in Real Estate - Partially Owned Unencumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	13
Units | ApartmentUnit	2,646
Investment in Real Estate, Gross	$ 661,445,674
Accumulated Depreciation	(217,880,998)
Investment in Real Estate, Net	443,564,676
Encumbrances	$ 0
Investment in Real Estate - Partially Owned Encumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	3
Units | ApartmentUnit	900
Investment in Real Estate, Gross	$ 344,324,608
Accumulated Depreciation	(82,552,319)
Investment in Real Estate, Net	261,772,289
Encumbrances	$ 232,148,309
NONCONTROLLING INTERESTS - PARTIALLY OWNED PROPERTIES
Overall summary of real estate and accumulated depreciation
Properties | Property	16
Units | ApartmentUnit	3,546
Investment in Real Estate, Gross	$ 1,005,770,282
Accumulated Depreciation	(300,433,317)
Investment in Real Estate, Net	705,336,965
Encumbrances	$ 232,148,309
Unencumbered Properties [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	269
Units | ApartmentUnit	70,394
Investment in Real Estate, Gross	$ 24,514,344,944
Accumulated Depreciation	(7,257,624,044)
Investment in Real Estate, Net	17,256,720,900
Encumbrances	$ 0
Encumbered Properties [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	41
Units | ApartmentUnit	10,013
Investment in Real Estate, Gross	$ 3,758,561,441
Accumulated Depreciation	(1,096,658,157)
Investment in Real Estate, Net	2,661,903,284
Encumbrances	$ 2,191,201,017
Total Consolidated Investment in Real Estate [Member]
Overall summary of real estate and accumulated depreciation
Properties | Property	310
Units | ApartmentUnit	80,407
Investment in Real Estate, Gross	$ 28,272,906,385
Accumulated Depreciation	(8,354,282,201)
Investment in Real Estate, Net	19,918,624,184
Encumbrances	$ 2,191,201,017

Schedule III - Real Estate an_3

Schedule III - Real Estate and Accumulated Depreciation-Encumbrances Reconciliation (Details)	Dec. 31, 2021USD ($)Property
Total Consolidated Investment in Real Estate [Member]
Overall summary of real estate and accumulated depreciation
Encumbrances	$ 2,191,201,017
Archstone Master Property [Member]
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]
Number of Properties Encumbered | Property	12
Overall summary of real estate and accumulated depreciation
Encumbrances	$ 799,153,560
Portfolio Entity Encumbrances [Member]
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]
Number of Properties Encumbered | Property	12
Portfolio Entity Encumbrances [Member]
Overall summary of real estate and accumulated depreciation
Encumbrances	$ 799,153,560
Individual Property Encumbrances [Member]
Overall summary of real estate and accumulated depreciation
Encumbrances	$ 1,392,047,457

Schedule III - Real Estate an_4

Schedule III - Real Estate and Accumulated Depreciation-Encumbrances Reconciliation (Parenthetical) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Archstone Master Property [Member]
Real Estate And Accumulated Depreciation [Line Items]
Temporary letter of credit	$ 60

Schedule III - Real Estate an_5

Schedule III - Real Estate and Accumulated Depreciation - Summary of Changes in Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in total real estate
Balance, beginning of year	$ 27,203,325	$ 27,533,607	$ 26,511,022
Acquisitions and development	1,912,579	298,847	1,704,320
Improvements	152,715	154,433	180,944
Dispositions and other	(995,713)	(783,562)	(862,679)
Balance, end of year	$ 28,272,906	$ 27,203,325	$ 27,533,607

Schedule III - Real Estate an_6

Schedule III - Real Estate and Accumulated Depreciation - Summary of Changes in Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in accumulated depreciation
Balance, beginning of year	$ 7,859,657	$ 7,276,786	$ 6,696,281
Depreciation	838,272	820,832	831,083
Dispositions and other	(343,647)	(237,961)	(250,578)
Balance, end of year	$ 8,354,282	$ 7,859,657	$ 7,276,786

Schedule III - Real Estate an_7

Schedule III - Real Estate and Accumulated Depreciation (Details)	12 Months Ended
	Dec. 31, 2021USD ($)ApartmentUnit	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Real Estate And Accumulated Depreciation Abstract
Accumulated Depreciation	$ (8,354,282,000)	$ (7,859,657,000)	$ (7,276,786,000)	$ (6,696,281,000)
100 K Apartments (fka 100K Street) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	222
Initial Cost to Company, Land	$ 15,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	70,296,069
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	80,503
Gross Amount Carried at close of period 12/31/2021, Land	15,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	70,376,572
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,976,572
Accumulated Depreciation	(9,006,912)
Investment in Real Estate, Net	76,969,660
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
140 Riverside Boulevard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	354
Initial Cost to Company, Land	$ 103,539,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	94,082,725
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,259,577
Gross Amount Carried at close of period 12/31/2021, Land	103,539,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	105,342,302
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	208,881,402
Accumulated Depreciation	(60,169,233)
Investment in Real Estate, Net	148,712,169
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
160 Riverside Boulevard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	455
Initial Cost to Company, Land	$ 139,933,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	190,964,745
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,648,569
Gross Amount Carried at close of period 12/31/2021, Land	139,933,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	209,613,314
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	349,546,814
Accumulated Depreciation	(119,792,673)
Investment in Real Estate, Net	229,754,141
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
170 Amsterdam [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	236
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	112,096,955
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	758,783
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	112,855,738
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,855,738
Accumulated Depreciation	(29,560,885)
Investment in Real Estate, Net	83,294,853
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
175 Kent [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	113
Initial Cost to Company, Land	$ 22,037,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,962,169
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,645,841
Gross Amount Carried at close of period 12/31/2021, Land	22,037,831
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,608,010
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	78,645,841
Accumulated Depreciation	(22,155,198)
Investment in Real Estate, Net	56,490,643
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
180 Montague (fka Brooklyn Heights) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	193
Initial Cost to Company, Land	$ 32,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	92,675,228
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,658,812
Gross Amount Carried at close of period 12/31/2021, Land	32,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	98,334,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	130,734,040
Accumulated Depreciation	(34,293,888)
Investment in Real Estate, Net	96,440,152
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
180 Riverside Boulevard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	516
Initial Cost to Company, Land	$ 144,968,250
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	138,346,681
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	19,787,240
Gross Amount Carried at close of period 12/31/2021, Land	144,968,250
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	158,133,921
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	303,102,171
Accumulated Depreciation	(89,675,680)
Investment in Real Estate, Net	213,426,491
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1210 Mass [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	144
Initial Cost to Company, Land	$ 9,213,512
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,559,189
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,143,076
Gross Amount Carried at close of period 12/31/2021, Land	9,213,512
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,702,265
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,915,777
Accumulated Depreciation	(23,095,902)
Investment in Real Estate, Net	26,819,875
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1401 Joyce on Pentagon Row [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	326
Initial Cost to Company, Land	$ 9,780,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,668,165
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,800,708
Gross Amount Carried at close of period 12/31/2021, Land	9,780,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,468,873
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,248,873
Accumulated Depreciation	(44,718,792)
Investment in Real Estate, Net	60,530,081
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1500 Mass Ave [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	556
Initial Cost to Company, Land	$ 54,638,298
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,361,702
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	17,093,200
Gross Amount Carried at close of period 12/31/2021, Land	54,638,298
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,454,902
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,093,200
Accumulated Depreciation	(33,979,290)
Investment in Real Estate, Net	78,113,910
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1800 Oak (fka Rosslyn) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	314
Initial Cost to Company, Land	$ 31,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	109,005,734
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,759,712
Gross Amount Carried at close of period 12/31/2021, Land	31,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	119,765,446
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	151,165,446
Accumulated Depreciation	(42,105,522)
Investment in Real Estate, Net	109,059,924
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
2201 Pershing Drive [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	188
Initial Cost to Company, Land	$ 11,321,198
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	49,674,175
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,031,770
Gross Amount Carried at close of period 12/31/2021, Land	11,321,198
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	52,705,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	64,027,143
Accumulated Depreciation	(19,161,188)
Investment in Real Estate, Net	44,865,955
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
2201 Wilson [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	219
Initial Cost to Company, Land	$ 21,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,724,663
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,665,866
Gross Amount Carried at close of period 12/31/2021, Land	21,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,390,529
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	107,290,529
Accumulated Depreciation	(29,690,417)
Investment in Real Estate, Net	77,600,112
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
2400 M St [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	359
Initial Cost to Company, Land	$ 30,006,593
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,013,785
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,972,552
Gross Amount Carried at close of period 12/31/2021, Land	30,006,593
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	118,986,337
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,992,930
Accumulated Depreciation	(65,723,407)
Investment in Real Estate, Net	83,269,523
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
315 on A [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	202
Initial Cost to Company, Land	$ 14,450,070
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	115,824,930
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,553,517
Gross Amount Carried at close of period 12/31/2021, Land	14,450,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	117,378,447
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	131,828,517
Accumulated Depreciation	(31,402,367)
Investment in Real Estate, Net	100,426,150
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
340 Fremont (fka Rincon Hill) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	348
Initial Cost to Company, Land	$ 42,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	248,607,902
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	501,737
Gross Amount Carried at close of period 12/31/2021, Land	42,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	249,109,639
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	291,109,639
Accumulated Depreciation	(52,713,886)
Investment in Real Estate, Net	238,395,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
341 Nevins [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 3,621,717
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	299,143
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	3,621,717
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	299,143
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	3,920,860
Accumulated Depreciation	0
Investment in Real Estate, Net	3,920,860
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
3003 Van Ness (fka Van Ness) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	625
Initial Cost to Company, Land	$ 56,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	141,191,580
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,574,525
Gross Amount Carried at close of period 12/31/2021, Land	56,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	150,766,105
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	207,066,105
Accumulated Depreciation	(54,530,411)
Investment in Real Estate, Net	152,535,694
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
425 Mass [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	559
Initial Cost to Company, Land	$ 28,150,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	138,600,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,876,074
Gross Amount Carried at close of period 12/31/2021, Land	28,150,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	145,476,074
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,626,074
Accumulated Depreciation	(63,089,507)
Investment in Real Estate, Net	110,536,567
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
455 Eye Street [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 11,941,407
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,418,689
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	133,247
Gross Amount Carried at close of period 12/31/2021, Land	11,941,407
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,551,936
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,493,343
Accumulated Depreciation	(10,963,269)
Investment in Real Estate, Net	62,530,074
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
4th and Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 13,131,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,868,544
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	13,131,456
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	1,868,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,000,000
Accumulated Depreciation	0
Investment in Real Estate, Net	15,000,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
55 West Fifth I & II (fka Townhouse Plaza and Gardens) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	241
Initial Cost to Company, Land	$ 21,041,710
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	71,931,323
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,165,469
Gross Amount Carried at close of period 12/31/2021, Land	21,041,710
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	87,096,792
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,138,502
Accumulated Depreciation	(36,196,476)
Investment in Real Estate, Net	71,942,026
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
600 Washington [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	135
Initial Cost to Company, Land	$ 32,852,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,140,551
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,632,257
Gross Amount Carried at close of period 12/31/2021, Land	32,852,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,772,808
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	79,624,808
Accumulated Depreciation	(25,544,371)
Investment in Real Estate, Net	54,080,437
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
660 Washington (fka Boston Common) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	420
Initial Cost to Company, Land	$ 106,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	166,311,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,878,053
Gross Amount Carried at close of period 12/31/2021, Land	106,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,189,732
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	284,289,732
Accumulated Depreciation	(59,198,371)
Investment in Real Estate, Net	225,091,361
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
70 Greene [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	480
Initial Cost to Company, Land	$ 28,108,899
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	236,763,553
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,657,362
Gross Amount Carried at close of period 12/31/2021, Land	28,108,899
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	241,420,915
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	269,529,814
Accumulated Depreciation	(98,364,599)
Investment in Real Estate, Net	171,165,215
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
71 Broadway [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	238
Initial Cost to Company, Land	$ 22,611,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,492,171
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	20,626,142
Gross Amount Carried at close of period 12/31/2021, Land	22,611,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	98,118,313
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	120,729,913
Accumulated Depreciation	(59,615,389)
Investment in Real Estate, Net	61,114,524
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
77 Bluxome [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	102
Initial Cost to Company, Land	$ 5,249,124
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,609,876
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	604,943
Gross Amount Carried at close of period 12/31/2021, Land	5,249,124
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,214,819
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,463,943
Accumulated Depreciation	(7,624,709)
Investment in Real Estate, Net	16,839,234
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
77 Park Avenue (fka Hoboken) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hoboken, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	301
Initial Cost to Company, Land	$ 27,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	168,992,440
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,369,855
Gross Amount Carried at close of period 12/31/2021, Land	27,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	179,362,295
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	207,262,295
Accumulated Depreciation	(60,865,749)
Investment in Real Estate, Net	146,396,546
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
777 Sixth [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	294
Initial Cost to Company, Land	$ 65,352,706
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	65,747,294
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,035,138
Gross Amount Carried at close of period 12/31/2021, Land	65,352,706
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	71,782,432
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,135,138
Accumulated Depreciation	(35,483,508)
Investment in Real Estate, Net	101,651,630
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
88 Hillside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Daly City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	95
Initial Cost to Company, Land	$ 7,786,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,587,325
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,723,049
Gross Amount Carried at close of period 12/31/2021, Land	7,786,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,310,374
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,097,174
Accumulated Depreciation	(14,208,098)
Investment in Real Estate, Net	28,889,076
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
855 Brannan [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	449
Initial Cost to Company, Land	$ 41,363,921
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	282,738,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	420,418
Gross Amount Carried at close of period 12/31/2021, Land	41,363,921
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	283,158,742
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	324,522,663
Accumulated Depreciation	(46,006,671)
Investment in Real Estate, Net	278,515,992
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
929 Mass (fka 929 House) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	127
Initial Cost to Company, Land	$ 3,252,993
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,745,595
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,984,103
Gross Amount Carried at close of period 12/31/2021, Land	3,252,993
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,729,698
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,982,691
Accumulated Depreciation	(22,259,777)
Investment in Real Estate, Net	11,722,914
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Academy Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	North Hollywood, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	248
Initial Cost to Company, Land	$ 25,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,593,194
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,983,148
Gross Amount Carried at close of period 12/31/2021, Land	25,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,576,342
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,576,342
Accumulated Depreciation	(22,857,050)
Investment in Real Estate, Net	37,719,292
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Acappella [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pasadena, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	143
Initial Cost to Company, Land	$ 5,839,548
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,360,452
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,459,547
Gross Amount Carried at close of period 12/31/2021, Land	5,839,548
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,819,999
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,659,547
Accumulated Depreciation	(14,549,362)
Investment in Real Estate, Net	23,110,185
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alban Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	229
Initial Cost to Company, Land	$ 18,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,794,201
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,420,013
Gross Amount Carried at close of period 12/31/2021, Land	18,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	97,214,214
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	116,114,214
Accumulated Depreciation	(33,052,284)
Investment in Real Estate, Net	83,061,930
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alborada [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fremont, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	442
Initial Cost to Company, Land	$ 24,310,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	59,214,129
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,938,962
Gross Amount Carried at close of period 12/31/2021, Land	24,310,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,153,091
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,463,091
Accumulated Depreciation	(49,918,901)
Investment in Real Estate, Net	43,544,190
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alcott Apartments (fka West End Tower) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	470
Initial Cost to Company, Land	$ 10,424,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	387,714,090
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	36,889
Gross Amount Carried at close of period 12/31/2021, Land	10,424,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	387,750,979
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	398,174,979
Accumulated Depreciation	(2,677,353)
Investment in Real Estate, Net	395,497,626
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Altitude (fka Village at Howard Hughes, The (Lots 1 & 2)) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	545
Initial Cost to Company, Land	$ 43,783,485
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	150,234,305
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	678,439
Gross Amount Carried at close of period 12/31/2021, Land	43,783,485
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	150,912,744
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	194,696,229
Accumulated Depreciation	(32,898,128)
Investment in Real Estate, Net	161,798,101
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alton, The (fka Millikan) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	344
Initial Cost to Company, Land	$ 11,049,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	96,523,928
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	322,646
Gross Amount Carried at close of period 12/31/2021, Land	11,049,027
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	96,846,574
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	107,895,601
Accumulated Depreciation	(19,309,890)
Investment in Real Estate, Net	88,585,711
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Arbor Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sunnyvale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	175
Initial Cost to Company, Land	$ 9,057,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,483,642
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,379,831
Gross Amount Carried at close of period 12/31/2021, Land	9,057,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,863,473
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,920,773
Accumulated Depreciation	(21,254,285)
Investment in Real Estate, Net	18,666,488
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Arches,The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sunnyvale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	410
Initial Cost to Company, Land	$ 26,650,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	62,850,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,419,103
Gross Amount Carried at close of period 12/31/2021, Land	26,650,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	67,269,103
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,919,103
Accumulated Depreciation	(29,273,217)
Investment in Real Estate, Net	64,645,886
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Artisan on Second [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	118
Initial Cost to Company, Land	$ 8,000,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,074,600
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,450,981
Gross Amount Carried at close of period 12/31/2021, Land	8,000,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,525,581
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,525,981
Accumulated Depreciation	(15,416,946)
Investment in Real Estate, Net	30,109,035
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Artistry Emeryville (fka Emeryville) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Emeryville, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	267
Initial Cost to Company, Land	$ 12,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,466,267
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,257,635
Gross Amount Carried at close of period 12/31/2021, Land	12,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,723,902
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	82,023,902
Accumulated Depreciation	(26,696,773)
Investment in Real Estate, Net	55,327,129
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Atelier [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	120
Initial Cost to Company, Land	$ 32,401,680
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,135,432
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	681,890
Gross Amount Carried at close of period 12/31/2021, Land	32,401,680
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,817,322
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	80,219,002
Accumulated Depreciation	(12,033,060)
Investment in Real Estate, Net	68,185,942
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Avenue Two [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	123
Initial Cost to Company, Land	$ 7,995,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,005,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,841,937
Gross Amount Carried at close of period 12/31/2021, Land	7,995,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,846,937
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,841,937
Accumulated Depreciation	(9,223,132)
Investment in Real Estate, Net	19,618,805
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Axis at Shady Grove [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rockville, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	366
Initial Cost to Company, Land	$ 14,745,774
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	90,503,831
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	376,262
Gross Amount Carried at close of period 12/31/2021, Land	14,745,774
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,880,093
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,625,867
Accumulated Depreciation	(15,555,350)
Investment in Real Estate, Net	90,070,517
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Azure (fka Mission Bay-Block 13) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	273
Initial Cost to Company, Land	$ 32,855,115
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	153,566,841
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	893,636
Gross Amount Carried at close of period 12/31/2021, Land	32,855,115
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	154,460,477
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	187,315,592
Accumulated Depreciation	(36,744,242)
Investment in Real Estate, Net	150,571,350
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bay Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Long Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	160
Initial Cost to Company, Land	$ 7,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	27,437,239
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,499,065
Gross Amount Carried at close of period 12/31/2021, Land	7,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,936,304
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,536,304
Accumulated Depreciation	(19,233,962)
Investment in Real Estate, Net	20,302,342
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Beatrice, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	302
Initial Cost to Company, Land	$ 114,351,405
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	165,648,595
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,092,110
Gross Amount Carried at close of period 12/31/2021, Land	114,351,405
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	168,740,705
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	283,092,110
Accumulated Depreciation	(62,467,433)
Investment in Real Estate, Net	220,624,677
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bella Vista I, II, III Combined [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Woodland Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	579
Initial Cost to Company, Land	$ 31,682,754
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	121,095,786
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,565,891
Gross Amount Carried at close of period 12/31/2021, Land	31,682,754
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	132,661,677
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	164,344,431
Accumulated Depreciation	(73,507,308)
Investment in Real Estate, Net	90,837,123
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Belle Arts Condominium Homes, LLC [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	1
Initial Cost to Company, Land	$ 63,158
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	236,157
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,098
Gross Amount Carried at close of period 12/31/2021, Land	63,158
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	238,255
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	301,413
Accumulated Depreciation	(108,223)
Investment in Real Estate, Net	193,190
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bella Fontaine [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	102
Initial Cost to Company, Land	$ 9,098,808
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,701,192
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,487,041
Gross Amount Carried at close of period 12/31/2021, Land	9,098,808
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,188,233
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,287,041
Accumulated Depreciation	(12,139,945)
Investment in Real Estate, Net	28,147,096
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Breakwater at Marina Del Rey [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	224
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,189,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,593,029
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	75,782,291
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	75,782,291
Accumulated Depreciation	(27,700,597)
Investment in Real Estate, Net	48,081,694
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Briarwood (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sunnyvale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	192
Initial Cost to Company, Land	$ 9,991,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	22,247,278
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,532,523
Gross Amount Carried at close of period 12/31/2021, Land	9,991,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,779,801
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,771,301
Accumulated Depreciation	(21,134,083)
Investment in Real Estate, Net	15,637,218
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Brodie, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Westminster, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	312
Initial Cost to Company, Land	$ 8,639,904
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,256,940
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	947,949
Gross Amount Carried at close of period 12/31/2021, Land	8,639,904
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,204,889
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,844,793
Accumulated Depreciation	(12,775,088)
Investment in Real Estate, Net	76,069,705
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Brooklyner, The (fka 111 Lawrence). [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Brooklyn, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	490
Initial Cost to Company, Land	$ 40,099,922
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	221,438,631
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,655,023
Gross Amount Carried at close of period 12/31/2021, Land	40,099,922
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	227,093,654
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	267,193,576
Accumulated Depreciation	(85,848,149)
Investment in Real Estate, Net	181,345,427
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
C on Pico [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	94
Initial Cost to Company, Land	$ 17,125,766
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,074,234
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	661,321
Gross Amount Carried at close of period 12/31/2021, Land	17,125,766
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,735,555
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,861,321
Accumulated Depreciation	(7,175,224)
Investment in Real Estate, Net	38,686,097
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Carlyle Mill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	317
Initial Cost to Company, Land	$ 10,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	51,367,913
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,986,014
Gross Amount Carried at close of period 12/31/2021, Land	10,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,353,927
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	71,353,927
Accumulated Depreciation	(39,619,406)
Investment in Real Estate, Net	31,734,521
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Carmel Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	384
Initial Cost to Company, Land	$ 2,288,300
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,596,281
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,182,734
Gross Amount Carried at close of period 12/31/2021, Land	2,288,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,779,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,067,315
Accumulated Depreciation	(30,571,076)
Investment in Real Estate, Net	5,496,239
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cascade [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	477
Initial Cost to Company, Land	$ 23,751,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	149,456,311
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	145,743
Gross Amount Carried at close of period 12/31/2021, Land	23,751,564
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	149,602,054
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,353,618
Accumulated Depreciation	(26,437,276)
Investment in Real Estate, Net	146,916,342
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Centennial (fka Centennial Court & Centennial Tower) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	408
Initial Cost to Company, Land	$ 9,700,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	70,080,378
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,453,455
Gross Amount Carried at close of period 12/31/2021, Land	9,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,533,833
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,233,833
Accumulated Depreciation	(51,055,366)
Investment in Real Estate, Net	44,178,467
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Centre Club Combined [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ontario, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	412
Initial Cost to Company, Land	$ 7,436,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,014,789
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,252,175
Gross Amount Carried at close of period 12/31/2021, Land	7,436,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,266,964
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,702,964
Accumulated Depreciation	(30,268,211)
Investment in Real Estate, Net	20,434,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Chelsea Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	113
Initial Cost to Company, Land	$ 3,397,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,289,074
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,146,126
Gross Amount Carried at close of period 12/31/2021, Land	3,397,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	12,435,200
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,832,300
Accumulated Depreciation	(9,742,785)
Investment in Real Estate, Net	6,089,515
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Chloe on Madison (fka 1401 E. Madison) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	137
Initial Cost to Company, Land	$ 10,401,958
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,807,106
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	32,014
Gross Amount Carried at close of period 12/31/2021, Land	10,401,958
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	53,839,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	64,241,078
Accumulated Depreciation	(4,838,864)
Investment in Real Estate, Net	59,402,214
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Chloe on Union (fka Chloe) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	117
Initial Cost to Company, Land	$ 14,835,571
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	39,359,650
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,970,001
Gross Amount Carried at close of period 12/31/2021, Land	14,835,571
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,329,651
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,165,222
Accumulated Depreciation	(8,287,738)
Investment in Real Estate, Net	48,877,484
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Church Corner [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	85
Initial Cost to Company, Land	$ 5,220,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,744,643
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,484,815
Gross Amount Carried at close of period 12/31/2021, Land	5,220,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,229,458
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,449,458
Accumulated Depreciation	(12,559,847)
Investment in Real Estate, Net	12,889,611
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Circa Fitzsimons [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	280
Initial Cost to Company, Land	$ 9,241,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	86,070,796
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	319,011
Gross Amount Carried at close of period 12/31/2021, Land	9,241,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,389,807
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,631,207
Accumulated Depreciation	(4,153,312)
Investment in Real Estate, Net	91,477,895
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
City Gate at Cupertino (fka Cupertino) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cupertino, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	311
Initial Cost to Company, Land	$ 40,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	95,937,046
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,939,273
Gross Amount Carried at close of period 12/31/2021, Land	40,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,876,319
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	144,276,319
Accumulated Depreciation	(37,159,709)
Investment in Real Estate, Net	107,116,610
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
City Square Bellevue (fka Bellevue) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	191
Initial Cost to Company, Land	$ 15,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	41,876,257
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,017,150
Gross Amount Carried at close of period 12/31/2021, Land	15,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,893,407
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,993,407
Accumulated Depreciation	(16,856,049)
Investment in Real Estate, Net	44,137,358
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Clarendon, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	292
Initial Cost to Company, Land	$ 30,400,340
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	103,824,660
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,937,604
Gross Amount Carried at close of period 12/31/2021, Land	30,400,340
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	106,762,264
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,162,604
Accumulated Depreciation	(43,908,001)
Investment in Real Estate, Net	93,254,603
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cleo, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	92
Initial Cost to Company, Land	$ 6,615,467
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,829,335
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,392,656
Gross Amount Carried at close of period 12/31/2021, Land	6,615,467
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,221,991
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,837,458
Accumulated Depreciation	(10,957,338)
Investment in Real Estate, Net	14,880,120
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Connecticut Heights [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	518
Initial Cost to Company, Land	$ 27,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,002,295
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,168,810
Gross Amount Carried at close of period 12/31/2021, Land	27,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	125,171,105
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	152,771,105
Accumulated Depreciation	(43,749,160)
Investment in Real Estate, Net	109,021,945
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Corcoran House at DuPont Circle (fka DuPont Circle) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	138
Initial Cost to Company, Land	$ 13,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,913,113
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,679,308
Gross Amount Carried at close of period 12/31/2021, Land	13,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,592,421
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,092,421
Accumulated Depreciation	(11,417,114)
Investment in Real Estate, Net	33,675,307
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Courthouse Plaza [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	396
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	87,386,024
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,944,020
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,330,044
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,330,044
Accumulated Depreciation	(35,422,571)
Investment in Real Estate, Net	59,907,473
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Creekside (San Mateo) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	192
Initial Cost to Company, Land	$ 9,606,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,193,232
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,859,790
Gross Amount Carried at close of period 12/31/2021, Land	9,606,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,053,022
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,659,622
Accumulated Depreciation	(21,045,859)
Investment in Real Estate, Net	15,613,763
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cronins Landing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Waltham, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	281
Initial Cost to Company, Land	$ 32,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	85,119,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	14,041,974
Gross Amount Carried at close of period 12/31/2021, Land	32,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	99,161,298
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	131,461,298
Accumulated Depreciation	(35,545,036)
Investment in Real Estate, Net	95,916,262
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Crystal Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	181
Initial Cost to Company, Land	$ 17,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,918,975
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,182,311
Gross Amount Carried at close of period 12/31/2021, Land	17,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	52,101,286
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	69,301,286
Accumulated Depreciation	(19,499,819)
Investment in Real Estate, Net	49,801,467
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Dalton, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	270
Initial Cost to Company, Land	$ 22,947,777
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	95,334,754
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	144,951
Gross Amount Carried at close of period 12/31/2021, Land	22,947,777
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,479,705
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	118,427,482
Accumulated Depreciation	(10,821,659)
Investment in Real Estate, Net	107,605,823
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Deerwood (SD)
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	316
Initial Cost to Company, Land	$ 2,082,095
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,739,815
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	17,201,750
Gross Amount Carried at close of period 12/31/2021, Land	2,082,095
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,941,565
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,023,660
Accumulated Depreciation	(32,390,313)
Investment in Real Estate, Net	5,633,347
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Del Mar Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	181
Initial Cost to Company, Land	$ 7,801,824
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,948,176
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,673,335
Gross Amount Carried at close of period 12/31/2021, Land	7,801,824
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,621,511
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,423,335
Accumulated Depreciation	(20,504,751)
Investment in Real Estate, Net	28,918,584
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Eagle Canyon [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chino Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	252
Initial Cost to Company, Land	$ 1,808,900
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,274,361
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,895,689
Gross Amount Carried at close of period 12/31/2021, Land	1,808,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,170,050
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	29,978,950
Accumulated Depreciation	(23,146,239)
Investment in Real Estate, Net	6,832,711
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Edge, The (fka 4885 Edgemoor Lane) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bethesda, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	154
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,090,698
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,090,698
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,090,698
Accumulated Depreciation	(1,337,668)
Investment in Real Estate, Net	71,753,030
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Edgemont at Bethesda Metro [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bethesda, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	122
Initial Cost to Company, Land	$ 13,092,552
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,907,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,598,672
Gross Amount Carried at close of period 12/31/2021, Land	13,092,552
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,506,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,598,672
Accumulated Depreciation	(18,431,823)
Investment in Real Estate, Net	42,166,849
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Emerson Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	444
Initial Cost to Company, Land	$ 14,855,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	57,566,636
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	37,319,848
Gross Amount Carried at close of period 12/31/2021, Land	14,855,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,886,484
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,741,484
Accumulated Depreciation	(72,262,761)
Investment in Real Estate, Net	37,478,723
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Encore at Sherman Oaks, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sherman Oaks, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 8,700,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,446,003
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,699,461
Gross Amount Carried at close of period 12/31/2021, Land	8,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,145,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,845,464
Accumulated Depreciation	(13,117,331)
Investment in Real Estate, Net	25,728,133
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Eviva on Cherokee [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	274
Initial Cost to Company, Land	$ 10,507,626
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	100,037,204
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	928,435
Gross Amount Carried at close of period 12/31/2021, Land	10,507,626
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	100,965,639
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	111,473,265
Accumulated Depreciation	(14,488,506)
Investment in Real Estate, Net	96,984,759
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Flora [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Austin, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	194
Initial Cost to Company, Land	$ 5,733,088
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,341,897
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,274
Gross Amount Carried at close of period 12/31/2021, Land	5,733,088
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,375,171
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,108,259
Accumulated Depreciation	(2,351,033)
Investment in Real Estate, Net	35,757,226
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Fremont Center [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fremont, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	322
Initial Cost to Company, Land	$ 25,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,753,114
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,432,484
Gross Amount Carried at close of period 12/31/2021, Land	25,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,185,598
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,985,598
Accumulated Depreciation	(30,713,571)
Investment in Real Estate, Net	79,272,027
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Gaithersburg Station [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Gaithersburg, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	400
Initial Cost to Company, Land	$ 17,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	74,678,917
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,910,339
Gross Amount Carried at close of period 12/31/2021, Land	17,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	79,589,256
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	97,089,256
Accumulated Depreciation	(26,550,891)
Investment in Real Estate, Net	70,538,365
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Gateway at Malden Center [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Malden, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	203
Initial Cost to Company, Land	$ 9,209,780
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,722,666
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,179,307
Gross Amount Carried at close of period 12/31/2021, Land	9,209,780
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,901,973
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,111,753
Accumulated Depreciation	(30,509,820)
Investment in Real Estate, Net	22,601,933
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Geary Court Yard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	165
Initial Cost to Company, Land	$ 1,722,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,471,429
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,418,695
Gross Amount Carried at close of period 12/31/2021, Land	1,722,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,890,124
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,612,524
Accumulated Depreciation	(17,437,666)
Investment in Real Estate, Net	6,174,858
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Girard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	160
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	102,450,328
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	987,940
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,438,268
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	103,438,268
Accumulated Depreciation	(18,672,977)
Investment in Real Estate, Net	84,765,291
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hampshire Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	259
Initial Cost to Company, Land	$ 10,806,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,335,330
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,226,550
Gross Amount Carried at close of period 12/31/2021, Land	10,806,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,561,880
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,367,880
Accumulated Depreciation	(23,198,296)
Investment in Real Estate, Net	27,169,584
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Harbor Steps [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	761
Initial Cost to Company, Land	$ 59,403,601
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	158,829,432
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	44,513,593
Gross Amount Carried at close of period 12/31/2021, Land	59,403,601
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	203,343,025
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	262,746,626
Accumulated Depreciation	(114,985,651)
Investment in Real Estate, Net	147,760,975
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hathaway [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Long Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	385
Initial Cost to Company, Land	$ 2,512,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	22,611,912
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,153,674
Gross Amount Carried at close of period 12/31/2021, Land	2,512,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,765,586
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,278,086
Accumulated Depreciation	(30,134,333)
Investment in Real Estate, Net	10,143,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Helios (fka 2nd+Pine) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	398
Initial Cost to Company, Land	$ 18,061,674
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	206,766,901
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	312,408
Gross Amount Carried at close of period 12/31/2021, Land	18,061,674
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	207,079,309
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	225,140,983
Accumulated Depreciation	(36,567,089)
Investment in Real Estate, Net	188,573,894
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Heritage at Stone Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlington, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	180
Initial Cost to Company, Land	$ 10,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,808,335
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,752,471
Gross Amount Carried at close of period 12/31/2021, Land	10,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,560,806
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,360,806
Accumulated Depreciation	(20,282,031)
Investment in Real Estate, Net	26,078,775
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Heritage Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Lynwood, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	197
Initial Cost to Company, Land	$ 6,895,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,983,597
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,870,503
Gross Amount Carried at close of period 12/31/2021, Land	6,895,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,854,100
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,749,100
Accumulated Depreciation	(13,956,897)
Investment in Real Estate, Net	16,792,203
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hesby [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	North Hollywood, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	308
Initial Cost to Company, Land	$ 23,299,892
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	102,700,108
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,729,069
Gross Amount Carried at close of period 12/31/2021, Land	23,299,892
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	105,429,177
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	128,729,069
Accumulated Depreciation	(32,170,802)
Investment in Real Estate, Net	96,558,267
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Highlands at South Plainfield [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	South Plainfield, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	252
Initial Cost to Company, Land	$ 10,080,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	37,526,912
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,230,733
Gross Amount Carried at close of period 12/31/2021, Land	10,080,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,757,645
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,837,645
Accumulated Depreciation	(23,217,224)
Investment in Real Estate, Net	27,620,421
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hikari [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	128
Initial Cost to Company, Land	$ 9,435,760
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,564,240
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,453,552
Gross Amount Carried at close of period 12/31/2021, Land	9,435,760
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,017,792
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,453,552
Accumulated Depreciation	(13,835,502)
Investment in Real Estate, Net	29,618,050
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hudson Crossing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	259
Initial Cost to Company, Land	$ 23,420,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,977,699
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,571,165
Gross Amount Carried at close of period 12/31/2021, Land	23,420,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,548,864
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	96,968,864
Accumulated Depreciation	(43,605,553)
Investment in Real Estate, Net	53,363,311
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hudson Pointe [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	182
Initial Cost to Company, Land	$ 5,350,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	41,114,074
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,229,014
Gross Amount Carried at close of period 12/31/2021, Land	5,350,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,343,088
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	54,693,088
Accumulated Depreciation	(30,026,653)
Investment in Real Estate, Net	24,666,435
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Huxley, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	137
Initial Cost to Company, Land	$ 18,775,028
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,336,651
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	105,265
Gross Amount Carried at close of period 12/31/2021, Land	18,775,028
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,441,916
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,216,944
Accumulated Depreciation	(10,326,938)
Investment in Real Estate, Net	97,890,006
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Indie Deep Ellum [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Dallas, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	231
Initial Cost to Company, Land	$ 12,253,503
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,844,734
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	35,414
Gross Amount Carried at close of period 12/31/2021, Land	12,253,503
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,880,148
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	76,133,651
Accumulated Depreciation	(2,577,427)
Investment in Real Estate, Net	73,556,224
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ivory Wood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bothell, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	144
Initial Cost to Company, Land	$ 2,732,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,888,282
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,742,943
Gross Amount Carried at close of period 12/31/2021, Land	2,732,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	16,631,225
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	19,364,025
Accumulated Depreciation	(9,766,422)
Investment in Real Estate, Net	9,597,603
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Jia (fka Chinatown Gateway) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	280
Initial Cost to Company, Land	$ 14,791,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,286,423
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,142,453
Gross Amount Carried at close of period 12/31/2021, Land	14,791,831
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	79,428,876
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,220,707
Accumulated Depreciation	(27,653,136)
Investment in Real Estate, Net	66,567,571
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Junction 47 (fka West Seattle) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	206
Initial Cost to Company, Land	$ 11,726,305
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,584,312
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	376,513
Gross Amount Carried at close of period 12/31/2021, Land	11,726,305
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,960,825
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,687,130
Accumulated Depreciation	(14,552,334)
Investment in Real Estate, Net	54,134,796
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Juniper Sandy Springs [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sandy Springs, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	230
Initial Cost to Company, Land	$ 8,668,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,965,193
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	17,829
Gross Amount Carried at close of period 12/31/2021, Land	8,668,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,983,022
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,651,722
Accumulated Depreciation	(622,903)
Investment in Real Estate, Net	73,028,819
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Kelvin, The (fka Modera) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	194
Initial Cost to Company, Land	$ 15,521,552
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,853,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	908,796
Gross Amount Carried at close of period 12/31/2021, Land	15,521,552
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	65,762,244
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,283,796
Accumulated Depreciation	(17,678,084)
Investment in Real Estate, Net	63,605,712
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Kilby [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Frisco, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	258
Initial Cost to Company, Land	$ 6,431,940
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,175,461
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	19,960
Gross Amount Carried at close of period 12/31/2021, Land	6,431,940
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,195,421
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	70,627,361
Accumulated Depreciation	(3,264,959)
Investment in Real Estate, Net	67,362,402
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Laguna Clara [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clara, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	264
Initial Cost to Company, Land	$ 13,642,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,684,902
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,733,754
Gross Amount Carried at close of period 12/31/2021, Land	13,642,420
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,418,656
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,061,076
Accumulated Depreciation	(22,548,251)
Investment in Real Estate, Net	29,512,825
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Laguna Clara II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clara, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,399,463
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,399,463
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	4,399,463
Accumulated Depreciation	0
Investment in Real Estate, Net	4,399,463
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Landings at Port Imperial [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	W. New York, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	276
Initial Cost to Company, Land	$ 27,246,045
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	37,741,050
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,597,064
Gross Amount Carried at close of period 12/31/2021, Land	27,246,045
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	54,338,114
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,584,159
Accumulated Depreciation	(37,633,786)
Investment in Real Estate, Net	43,950,373
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lane [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	217
Initial Cost to Company, Land	$ 13,142,946
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	71,939,706
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	125,613
Gross Amount Carried at close of period 12/31/2021, Land	13,142,946
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	72,065,319
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,208,265
Accumulated Depreciation	(7,428,489)
Investment in Real Estate, Net	77,779,776
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lex, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Jose, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	387
Initial Cost to Company, Land	$ 21,817,512
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	158,778,598
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	664,071
Gross Amount Carried at close of period 12/31/2021, Land	21,817,512
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	159,442,669
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	181,260,181
Accumulated Depreciation	(21,065,903)
Investment in Real Estate, Net	160,194,278
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Liberty Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Braintree, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	202
Initial Cost to Company, Land	$ 5,977,504
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,749,111
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,235,368
Gross Amount Carried at close of period 12/31/2021, Land	5,977,504
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,984,479
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,961,983
Accumulated Depreciation	(22,906,485)
Investment in Real Estate, Net	18,055,498
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Liberty Tower [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	235
Initial Cost to Company, Land	$ 16,382,822
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	83,817,078
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,030,560
Gross Amount Carried at close of period 12/31/2021, Land	16,382,822
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,847,638
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	106,230,460
Accumulated Depreciation	(38,101,851)
Investment in Real Estate, Net	68,128,609
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lincoln Heights [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	336
Initial Cost to Company, Land	$ 5,928,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,595,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,212,156
Gross Amount Carried at close of period 12/31/2021, Land	5,928,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,807,418
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,735,818
Accumulated Depreciation	(41,040,115)
Investment in Real Estate, Net	14,695,703
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lofts at Kendall Square (fka Kendall Square) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	186
Initial Cost to Company, Land	$ 18,696,674
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,445,657
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,812,849
Gross Amount Carried at close of period 12/31/2021, Land	18,696,674
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,258,506
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	104,955,180
Accumulated Depreciation	(31,085,417)
Investment in Real Estate, Net	73,869,763
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lofts at Kendall Square ll (fka 249 Third Street) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	84
Initial Cost to Company, Land	$ 4,603,326
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,012,266
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,164
Gross Amount Carried at close of period 12/31/2021, Land	4,603,326
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,045,430
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,648,756
Accumulated Depreciation	(3,879,191)
Investment in Real Estate, Net	44,769,565
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Longacre House [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	293
Initial Cost to Company, Land	$ 73,170,045
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,962,510
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,230,046
Gross Amount Carried at close of period 12/31/2021, Land	73,170,045
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,192,556
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	133,362,601
Accumulated Depreciation	(30,329,437)
Investment in Real Estate, Net	103,033,164
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Longfellow Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	710
Initial Cost to Company, Land	$ 38,264,917
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	132,175,915
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	94,971,924
Gross Amount Carried at close of period 12/31/2021, Land	38,264,917
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	227,147,839
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	265,412,756
Accumulated Depreciation	(173,153,336)
Investment in Real Estate, Net	92,259,420
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Luna Upper Westside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Atlanta, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	345
Initial Cost to Company, Land	$ 14,847,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,292,639
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,884
Gross Amount Carried at close of period 12/31/2021, Land	14,847,420
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	108,314,523
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	123,161,943
Accumulated Depreciation	(3,339,114)
Investment in Real Estate, Net	119,822,829
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Madox [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	131
Initial Cost to Company, Land	$ 9,679,635
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,594,205
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,254,672
Gross Amount Carried at close of period 12/31/2021, Land	9,679,635
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	65,848,877
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	75,528,512
Accumulated Depreciation	(10,085,214)
Investment in Real Estate, Net	65,443,298
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mantena [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	98
Initial Cost to Company, Land	$ 22,346,513
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,501,158
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,761,788
Gross Amount Carried at close of period 12/31/2021, Land	22,346,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,262,946
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,609,459
Accumulated Depreciation	(22,271,078)
Investment in Real Estate, Net	63,338,381
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Marina 41 (fka Marina Del Rey) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	623
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	168,842,442
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,015,523
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,857,965
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	178,857,965
Accumulated Depreciation	(65,825,369)
Investment in Real Estate, Net	113,032,596
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mariposa at Playa Del Rey (fka Playa Del Rey) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Playa Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	354
Initial Cost to Company, Land	$ 60,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,311,482
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,365,735
Gross Amount Carried at close of period 12/31/2021, Land	60,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	96,677,217
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	157,577,217
Accumulated Depreciation	(35,254,658)
Investment in Real Estate, Net	122,322,559
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mark On 8th [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 23,004,387
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	51,116,647
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	342,085
Gross Amount Carried at close of period 12/31/2021, Land	23,004,387
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,458,732
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	74,463,119
Accumulated Depreciation	(9,185,494)
Investment in Real Estate, Net	65,277,625
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Market Street Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	229
Initial Cost to Company, Land	$ 13,740,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,757,301
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,797,175
Gross Amount Carried at close of period 12/31/2021, Land	13,740,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,554,476
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,294,476
Accumulated Depreciation	(24,031,830)
Investment in Real Estate, Net	33,262,646
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Marlowe (fka Oakwood Crystal City) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 15,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,474,336
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,757,690
Gross Amount Carried at close of period 12/31/2021, Land	15,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,232,026
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,632,026
Accumulated Depreciation	(14,954,232)
Investment in Real Estate, Net	40,677,794
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Milano Lofts [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	99
Initial Cost to Company, Land	$ 8,125,216
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	27,378,784
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,530,389
Gross Amount Carried at close of period 12/31/2021, Land	8,125,216
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,909,173
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,034,389
Accumulated Depreciation	(11,851,749)
Investment in Real Estate, Net	28,182,640
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mill Creek [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Milpitas, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	516
Initial Cost to Company, Land	$ 12,858,693
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	57,168,503
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,798,964
Gross Amount Carried at close of period 12/31/2021, Land	12,858,693
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	75,967,467
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,826,160
Accumulated Depreciation	(46,782,863)
Investment in Real Estate, Net	42,043,297
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Milo [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	319
Initial Cost to Company, Land	$ 15,957,975
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	153,099,656
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	15,957,975
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	153,099,656
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	169,057,631
Accumulated Depreciation	0
Investment in Real Estate, Net	169,057,631
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mosaic at Metro [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hyattsville, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	260
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	59,580,898
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,837,346
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,418,244
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	61,418,244
Accumulated Depreciation	(27,876,865)
Investment in Real Estate, Net	33,541,379
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mountain View Redevelopment [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mountain View, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,166,909
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	2,166,909
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	2,166,909
Accumulated Depreciation	0
Investment in Real Estate, Net	2,166,909
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Mozaic at Union Station [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	272
Initial Cost to Company, Land	$ 8,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	52,529,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,930,062
Gross Amount Carried at close of period 12/31/2021, Land	8,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,459,508
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	63,959,508
Accumulated Depreciation	(29,803,888)
Investment in Real Estate, Net	34,155,620
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Murray Hill Tower (fka Murray Hill) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	270
Initial Cost to Company, Land	$ 75,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	102,705,401
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,129,682
Gross Amount Carried at close of period 12/31/2021, Land	75,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	115,835,083
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	191,635,083
Accumulated Depreciation	(43,363,080)
Investment in Real Estate, Net	148,272,003
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Next on Sixth [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	398
Initial Cost to Company, Land	$ 52,509,906
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	136,635,650
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	605,836
Gross Amount Carried at close of period 12/31/2021, Land	52,509,906
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	137,241,486
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	189,751,392
Accumulated Depreciation	(18,715,038)
Investment in Real Estate, Net	171,036,354
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
North Pier at Harborside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	297
Initial Cost to Company, Land	$ 4,000,159
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	94,290,590
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,474,470
Gross Amount Carried at close of period 12/31/2021, Land	4,000,159
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	104,765,060
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,765,219
Accumulated Depreciation	(61,029,617)
Investment in Real Estate, Net	47,735,602
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Northglen [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	234
Initial Cost to Company, Land	$ 9,360,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,778,553
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,516,774
Gross Amount Carried at close of period 12/31/2021, Land	9,360,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,295,327
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,655,327
Accumulated Depreciation	(19,023,647)
Investment in Real Estate, Net	18,631,680
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Northpark [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlingame, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	510
Initial Cost to Company, Land	$ 38,607,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,472,217
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,819,921
Gross Amount Carried at close of period 12/31/2021, Land	38,607,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,292,138
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	132,899,138
Accumulated Depreciation	(47,487,541)
Investment in Real Estate, Net	85,411,597
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Oak Park Combined [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Agoura Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	444
Initial Cost to Company, Land	$ 3,390,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,517,274
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,111,379
Gross Amount Carried at close of period 12/31/2021, Land	3,390,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,628,653
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,019,353
Accumulated Depreciation	(36,862,704)
Investment in Real Estate, Net	9,156,649
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Oaks [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clarita, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	520
Initial Cost to Company, Land	$ 23,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,020,438
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,122,280
Gross Amount Carried at close of period 12/31/2021, Land	23,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	71,142,718
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,542,718
Accumulated Depreciation	(44,090,629)
Investment in Real Estate, Net	50,452,089
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ocean Crest [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Solana Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	146
Initial Cost to Company, Land	$ 5,111,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,910,438
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,268,993
Gross Amount Carried at close of period 12/31/2021, Land	5,111,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,179,431
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,290,631
Accumulated Depreciation	(13,263,918)
Investment in Real Estate, Net	9,026,713
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Odin (fka Tallman) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	301
Initial Cost to Company, Land	$ 16,807,519
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,519,515
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	170,392
Gross Amount Carried at close of period 12/31/2021, Land	16,807,519
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,689,907
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,497,426
Accumulated Depreciation	(16,311,212)
Investment in Real Estate, Net	65,186,214
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Olivian at the Realm [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Lewisville, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	421
Initial Cost to Company, Land	$ 14,854,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	109,261,221
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	14,854,564
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	109,261,221
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	124,115,785
Accumulated Depreciation	0
Investment in Real Estate, Net	124,115,785
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
One Henry Adams [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	241
Initial Cost to Company, Land	$ 30,224,393
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	139,604,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	242,340
Gross Amount Carried at close of period 12/31/2021, Land	30,224,393
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	139,846,486
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	170,070,879
Accumulated Depreciation	(28,006,849)
Investment in Real Estate, Net	142,064,030
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
One India Street (fka Oakwood Boston) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	94
Initial Cost to Company, Land	$ 22,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,672,979
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,088,089
Gross Amount Carried at close of period 12/31/2021, Land	22,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,761,068
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,961,068
Accumulated Depreciation	(13,161,555)
Investment in Real Estate, Net	44,799,513
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Osprey [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Atlanta, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	320
Initial Cost to Company, Land	$ 18,121,932
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	116,942,248
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,397
Gross Amount Carried at close of period 12/31/2021, Land	18,121,932
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	116,951,645
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	135,073,577
Accumulated Depreciation	(4,243,648)
Investment in Real Estate, Net	130,829,929
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pacific Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	430
Initial Cost to Company, Land	$ 32,250,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	110,750,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,377,323
Gross Amount Carried at close of period 12/31/2021, Land	32,250,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	113,127,323
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	145,377,323
Accumulated Depreciation	(38,719,361)
Investment in Real Estate, Net	106,657,962
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Packard Building [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	61
Initial Cost to Company, Land	$ 5,911,041
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,954,959
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,289,877
Gross Amount Carried at close of period 12/31/2021, Land	5,911,041
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,244,836
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,155,877
Accumulated Depreciation	(5,677,314)
Investment in Real Estate, Net	21,478,563
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc 77 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	137
Initial Cost to Company, Land	$ 40,504,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,025,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,360,941
Gross Amount Carried at close of period 12/31/2021, Land	40,504,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,386,620
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	65,890,620
Accumulated Depreciation	(15,823,387)
Investment in Real Estate, Net	50,067,233
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc Cameron [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	166
Initial Cost to Company, Land	$ 37,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,855,597
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,969,567
Gross Amount Carried at close of period 12/31/2021, Land	37,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,825,164
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,425,164
Accumulated Depreciation	(12,804,109)
Investment in Real Estate, Net	42,621,055
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc Coliseum [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	177
Initial Cost to Company, Land	$ 52,654,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,045,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,151,472
Gross Amount Carried at close of period 12/31/2021, Land	52,654,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,197,223
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	85,851,223
Accumulated Depreciation	(21,315,552)
Investment in Real Estate, Net	64,535,671
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc East Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	324
Initial Cost to Company, Land	$ 102,163,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,989,402
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,975,990
Gross Amount Carried at close of period 12/31/2021, Land	102,163,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	122,965,392
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	225,128,392
Accumulated Depreciation	(65,431,630)
Investment in Real Estate, Net	159,696,762
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parc on Powell (fka Parkside at Emeryville) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Emeryville, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	173
Initial Cost to Company, Land	$ 16,667,059
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	65,468,571
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	894,344
Gross Amount Carried at close of period 12/31/2021, Land	16,667,059
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	66,362,915
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	83,029,974
Accumulated Depreciation	(17,329,432)
Investment in Real Estate, Net	65,700,542
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Park Connecticut [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	142
Initial Cost to Company, Land	$ 13,700,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	59,087,519
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,901,025
Gross Amount Carried at close of period 12/31/2021, Land	13,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	61,988,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	75,688,544
Accumulated Depreciation	(20,895,182)
Investment in Real Estate, Net	54,793,362
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Park West (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	444
Initial Cost to Company, Land	$ 3,033,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	27,302,383
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,432,822
Gross Amount Carried at close of period 12/31/2021, Land	3,033,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,735,205
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,768,705
Accumulated Depreciation	(34,282,511)
Investment in Real Estate, Net	9,486,194
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Parkside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Union City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	208
Initial Cost to Company, Land	$ 6,246,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,827,453
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,549,823
Gross Amount Carried at close of period 12/31/2021, Land	6,246,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,377,276
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,623,976
Accumulated Depreciation	(15,097,028)
Investment in Real Estate, Net	11,526,948
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pearl, The (WA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	80
Initial Cost to Company, Land	$ 6,972,585
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,527,415
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,256,823
Gross Amount Carried at close of period 12/31/2021, Land	6,972,585
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,784,238
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,756,823
Accumulated Depreciation	(7,499,036)
Investment in Real Estate, Net	27,257,787
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pearl MDR (fka Oakwood Marina Del Rey) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Marina Del Rey, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	597
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	120,795,359
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,187,274
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	127,982,633
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,982,633
Accumulated Depreciation	(48,509,088)
Investment in Real Estate, Net	79,473,545
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pegasus [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	322
Initial Cost to Company, Land	$ 18,094,052
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	81,905,948
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,565,146
Gross Amount Carried at close of period 12/31/2021, Land	18,094,052
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,471,094
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,565,146
Accumulated Depreciation	(38,970,462)
Investment in Real Estate, Net	69,594,684
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Portofino [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chino Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	176
Initial Cost to Company, Land	$ 3,572,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,660,994
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,142,052
Gross Amount Carried at close of period 12/31/2021, Land	3,572,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,803,046
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,375,446
Accumulated Depreciation	(15,501,829)
Investment in Real Estate, Net	6,873,617
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Portofino (Val) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	216
Initial Cost to Company, Land	$ 8,640,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,487,126
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,691,443
Gross Amount Carried at close of period 12/31/2021, Land	8,640,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,178,569
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,818,569
Accumulated Depreciation	(19,742,885)
Investment in Real Estate, Net	17,075,684
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Portside Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Jersey City, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	527
Initial Cost to Company, Land	$ 22,487,006
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	96,842,913
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	28,946,965
Gross Amount Carried at close of period 12/31/2021, Land	22,487,006
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	125,789,878
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,276,884
Accumulated Depreciation	(98,609,366)
Investment in Real Estate, Net	49,667,518
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Potrero 1010 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	453
Initial Cost to Company, Land	$ 40,830,011
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	181,924,463
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,453,552
Gross Amount Carried at close of period 12/31/2021, Land	40,830,011
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	183,378,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	224,208,026
Accumulated Depreciation	(41,306,612)
Investment in Real Estate, Net	182,901,414
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Prado (fka Glendale) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Glendale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	264
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,977,313
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,891,346
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	74,868,659
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	74,868,659
Accumulated Depreciation	(26,817,073)
Investment in Real Estate, Net	48,051,586
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Prime, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	281
Initial Cost to Company, Land	$ 34,625,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,879,740
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,109,136
Gross Amount Carried at close of period 12/31/2021, Land	34,625,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	83,988,876
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	118,613,876
Accumulated Depreciation	(38,545,149)
Investment in Real Estate, Net	80,068,727
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Prism at Park Avenue South (fka 400 Park Aveue South (EQR)) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	269
Initial Cost to Company, Land	$ 76,292,169
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	171,771,886
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	247,225
Gross Amount Carried at close of period 12/31/2021, Land	76,292,169
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	172,019,111
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	248,311,280
Accumulated Depreciation	(45,640,216)
Investment in Real Estate, Net	202,671,064
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Promenade at Town Center I & II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	564
Initial Cost to Company, Land	$ 28,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,795,915
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,138,641
Gross Amount Carried at close of period 12/31/2021, Land	28,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,934,556
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,134,556
Accumulated Depreciation	(50,812,260)
Investment in Real Estate, Net	62,322,296
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Providence [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bothell, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	200
Initial Cost to Company, Land	$ 3,573,621
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,055,505
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,727,670
Gross Amount Carried at close of period 12/31/2021, Land	3,573,621
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,783,175
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,356,796
Accumulated Depreciation	(14,191,409)
Investment in Real Estate, Net	14,165,387
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Quarry Hills [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	316
Initial Cost to Company, Land	$ 26,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	84,411,162
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,214,690
Gross Amount Carried at close of period 12/31/2021, Land	26,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,625,852
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	116,525,852
Accumulated Depreciation	(32,044,955)
Investment in Real Estate, Net	84,480,897
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Radiant Fairfax Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	213
Initial Cost to Company, Land	$ 7,352,547
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,018,744
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	130,731
Gross Amount Carried at close of period 12/31/2021, Land	7,352,547
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,149,475
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	70,502,022
Accumulated Depreciation	(3,775,097)
Investment in Real Estate, Net	66,726,925
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Radius Uptown [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	372
Initial Cost to Company, Land	$ 13,644,960
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	121,899,084
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,896,784
Gross Amount Carried at close of period 12/31/2021, Land	13,644,960
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	123,795,868
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,440,828
Accumulated Depreciation	(19,855,000)
Investment in Real Estate, Net	117,585,828
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Red 160 (fka Redmond Way) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	250
Initial Cost to Company, Land	$ 15,546,376
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	65,320,010
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,795,106
Gross Amount Carried at close of period 12/31/2021, Land	15,546,376
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	67,115,116
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	82,661,492
Accumulated Depreciation	(25,272,790)
Investment in Real Estate, Net	57,388,702
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Redmond Court [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	206
Initial Cost to Company, Land	$ 10,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,488,745
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,730,013
Gross Amount Carried at close of period 12/31/2021, Land	10,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,218,758
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	47,518,758
Accumulated Depreciation	(14,009,343)
Investment in Real Estate, Net	33,509,415
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Regency Palms [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Huntington Beach, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	310
Initial Cost to Company, Land	$ 1,857,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,713,254
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,707,710
Gross Amount Carried at close of period 12/31/2021, Land	1,857,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,420,964
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,278,364
Accumulated Depreciation	(20,984,954)
Investment in Real Estate, Net	6,293,410
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Burlington, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlington, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	270
Initial Cost to Company, Land	$ 20,250,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,475,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	101,854
Gross Amount Carried at close of period 12/31/2021, Land	20,250,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	114,577,377
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	134,827,377
Accumulated Depreciation	(5,817,645)
Investment in Real Estate, Net	129,009,732
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Clarendon Centre, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	252
Initial Cost to Company, Land	$ 10,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	52,812,935
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,327,794
Gross Amount Carried at close of period 12/31/2021, Land	10,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	58,140,729
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,640,729
Accumulated Depreciation	(36,876,197)
Investment in Real Estate, Net	31,764,532
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Eisenhower, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	226
Initial Cost to Company, Land	$ 6,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,585,059
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,515,216
Gross Amount Carried at close of period 12/31/2021, Land	6,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,100,275
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,600,275
Accumulated Depreciation	(25,376,674)
Investment in Real Estate, Net	21,223,601
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Empire Lakes [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rancho Cucamonga, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	467
Initial Cost to Company, Land	$ 16,345,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,080,670
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,210,962
Gross Amount Carried at close of period 12/31/2021, Land	16,345,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,291,632
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	97,636,632
Accumulated Depreciation	(44,759,994)
Investment in Real Estate, Net	52,876,638
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Fairfax Corner [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	652
Initial Cost to Company, Land	$ 15,804,057
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,129,050
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,867,418
Gross Amount Carried at close of period 12/31/2021, Land	15,804,057
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	76,996,468
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,800,525
Accumulated Depreciation	(50,742,107)
Investment in Real Estate, Net	42,058,418
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Mountain View (fka Mountain View) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mountain View, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	180
Initial Cost to Company, Land	$ 27,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,029,605
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,523,900
Gross Amount Carried at close of period 12/31/2021, Land	27,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,553,505
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,553,505
Accumulated Depreciation	(16,598,937)
Investment in Real Estate, Net	51,954,568
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Potomac Yard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	588
Initial Cost to Company, Land	$ 11,918,917
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	68,862,641
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	19,250,823
Gross Amount Carried at close of period 12/31/2021, Land	11,918,917
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	88,113,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	100,032,381
Accumulated Depreciation	(53,684,381)
Investment in Real Estate, Net	46,348,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Reserve at Town Center I-III (WA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mill Creek, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	584
Initial Cost to Company, Land	$ 16,768,705
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,623,664
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	11,315,691
Gross Amount Carried at close of period 12/31/2021, Land	16,768,705
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	88,939,355
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,708,060
Accumulated Depreciation	(43,366,666)
Investment in Real Estate, Net	62,341,394
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rianna I & II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	156
Initial Cost to Company, Land	$ 4,430,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,298,096
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,975,735
Gross Amount Carried at close of period 12/31/2021, Land	4,430,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,273,831
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,703,831
Accumulated Depreciation	(14,608,457)
Investment in Real Estate, Net	21,095,374
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ridgewood Village I&II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	408
Initial Cost to Company, Land	$ 11,809,500
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,004,048
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,140,439
Gross Amount Carried at close of period 12/31/2021, Land	11,809,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,144,487
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,953,987
Accumulated Depreciation	(30,998,875)
Investment in Real Estate, Net	21,955,112
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Riva Terra I (fka Redwood Shores) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	304
Initial Cost to Company, Land	$ 34,963,355
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	84,587,658
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,421,032
Gross Amount Carried at close of period 12/31/2021, Land	34,963,355
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	93,008,690
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,972,045
Accumulated Depreciation	(35,095,846)
Investment in Real Estate, Net	92,876,199
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Riva Terra II (fka Harborside) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redwood City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	149
Initial Cost to Company, Land	$ 17,136,645
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,536,531
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,141,820
Gross Amount Carried at close of period 12/31/2021, Land	17,136,645
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,678,351
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	61,814,996
Accumulated Depreciation	(15,663,545)
Investment in Real Estate, Net	46,151,451
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Riverpark [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	321
Initial Cost to Company, Land	$ 14,355,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	80,894,049
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,143,443
Gross Amount Carried at close of period 12/31/2021, Land	14,355,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,037,492
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	100,392,492
Accumulated Depreciation	(33,609,905)
Investment in Real Estate, Net	66,782,587
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rivington, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hoboken, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	240
Initial Cost to Company, Land	$ 34,340,640
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	112,112,152
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,260,470
Gross Amount Carried at close of period 12/31/2021, Land	34,340,640
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	116,372,622
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	150,713,262
Accumulated Depreciation	(20,226,305)
Investment in Real Estate, Net	130,486,957
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rivington II, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hoboken, NJ
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	736,622
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	736,622
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	736,622
Accumulated Depreciation	0
Investment in Real Estate, Net	736,622
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rosecliff II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	130
Initial Cost to Company, Land	$ 4,922,840
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	30,202,160
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,042,877
Gross Amount Carried at close of period 12/31/2021, Land	4,922,840
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,245,037
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,167,877
Accumulated Depreciation	(13,320,307)
Investment in Real Estate, Net	23,847,570
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Sakura Crossing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	230
Initial Cost to Company, Land	$ 14,641,990
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	42,858,010
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,646,714
Gross Amount Carried at close of period 12/31/2021, Land	14,641,990
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,504,724
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,146,714
Accumulated Depreciation	(19,007,871)
Investment in Real Estate, Net	40,138,843
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Saxton [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	325
Initial Cost to Company, Land	$ 38,805,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	128,652,023
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	474,368
Gross Amount Carried at close of period 12/31/2021, Land	38,805,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	129,126,391
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	167,931,791
Accumulated Depreciation	(14,473,592)
Investment in Real Estate, Net	153,458,199
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Seventh & James [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	96
Initial Cost to Company, Land	$ 663,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,974,803
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,681,230
Gross Amount Carried at close of period 12/31/2021, Land	663,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	10,656,033
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	11,319,833
Accumulated Depreciation	(8,984,088)
Investment in Real Estate, Net	2,335,745
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Sheffield Court [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	597
Initial Cost to Company, Land	$ 3,342,381
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,337,332
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,942,021
Gross Amount Carried at close of period 12/31/2021, Land	3,342,381
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	53,279,353
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,621,734
Accumulated Depreciation	(43,912,782)
Investment in Real Estate, Net	12,708,952
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Siena Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Lake Forest, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	356
Initial Cost to Company, Land	$ 8,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,083,024
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,984,059
Gross Amount Carried at close of period 12/31/2021, Land	8,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,067,083
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	41,967,083
Accumulated Depreciation	(25,390,768)
Investment in Real Estate, Net	16,576,315
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skycrest [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Valencia, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	264
Initial Cost to Company, Land	$ 10,560,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,574,457
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,723,207
Gross Amount Carried at close of period 12/31/2021, Land	10,560,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,297,664
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,857,664
Accumulated Depreciation	(22,365,804)
Investment in Real Estate, Net	20,491,860
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skyhouse South [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Atlanta, GA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	320
Initial Cost to Company, Land	$ 14,182,277
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	101,913,422
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	158,435
Gross Amount Carried at close of period 12/31/2021, Land	14,182,277
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	102,071,857
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	116,254,134
Accumulated Depreciation	(5,725,734)
Investment in Real Estate, Net	110,528,400
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skylark [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Union City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	174
Initial Cost to Company, Land	$ 1,781,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,731,916
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,805,074
Gross Amount Carried at close of period 12/31/2021, Land	1,781,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,536,990
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,318,590
Accumulated Depreciation	(17,322,154)
Investment in Real Estate, Net	6,996,436
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skyview [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rancho Santa Margarita, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	260
Initial Cost to Company, Land	$ 3,380,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,952,863
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,350,413
Gross Amount Carried at close of period 12/31/2021, Land	3,380,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,303,276
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,683,276
Accumulated Depreciation	(21,352,684)
Investment in Real Estate, Net	10,330,592
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
SoMa II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 29,406,606
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,919,806
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	29,406,606
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	5,919,806
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,326,412
Accumulated Depreciation	0
Investment in Real Estate, Net	35,326,412
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Sonterra at Foothill Ranch [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foothill Ranch, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	300
Initial Cost to Company, Land	$ 7,503,400
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,048,507
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,366,303
Gross Amount Carried at close of period 12/31/2021, Land	7,503,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,414,810
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,918,210
Accumulated Depreciation	(23,842,813)
Investment in Real Estate, Net	14,075,397
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
South City Station (fka South San Francisco) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	368
Initial Cost to Company, Land	$ 68,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,476,861
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,779,557
Gross Amount Carried at close of period 12/31/2021, Land	68,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	87,256,418
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	156,156,418
Accumulated Depreciation	(30,685,655)
Investment in Real Estate, Net	125,470,763
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Southwood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Palo Alto, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	100
Initial Cost to Company, Land	$ 6,936,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,324,069
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,081,692
Gross Amount Carried at close of period 12/31/2021, Land	6,936,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,405,761
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,342,361
Accumulated Depreciation	(15,883,455)
Investment in Real Estate, Net	12,458,906
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Springline [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	136
Initial Cost to Company, Land	$ 9,163,667
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,910,981
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	549,328
Gross Amount Carried at close of period 12/31/2021, Land	9,163,667
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	48,460,309
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,623,976
Accumulated Depreciation	(9,997,909)
Investment in Real Estate, Net	47,626,067
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
STOA [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	237
Initial Cost to Company, Land	$ 25,326,048
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,976,031
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	496,107
Gross Amount Carried at close of period 12/31/2021, Land	25,326,048
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,472,138
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,798,186
Accumulated Depreciation	(11,336,753)
Investment in Real Estate, Net	94,461,433
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Summerset Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chatsworth, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	280
Initial Cost to Company, Land	$ 2,890,450
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,670,889
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,118,095
Gross Amount Carried at close of period 12/31/2021, Land	2,890,450
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,788,984
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,679,434
Accumulated Depreciation	(27,722,137)
Investment in Real Estate, Net	7,957,297
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Ten23 (fka 500 West 23rd Street) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	111
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	58,881,873
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,671,777
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,553,650
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,553,650
Accumulated Depreciation	(20,445,713)
Investment in Real Estate, Net	40,107,937
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Terraces, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	117
Initial Cost to Company, Land	$ 14,087,610
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,314,151
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,658,613
Gross Amount Carried at close of period 12/31/2021, Land	14,087,610
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,972,764
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,060,374
Accumulated Depreciation	(8,712,774)
Investment in Real Estate, Net	24,347,600
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Square One [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	112
Initial Cost to Company, Land	$ 7,222,544
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,277,456
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	163,775
Gross Amount Carried at close of period 12/31/2021, Land	7,222,544
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,441,231
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,663,775
Accumulated Depreciation	(8,120,956)
Investment in Real Estate, Net	25,542,819
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Theo [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	275
Initial Cost to Company, Land	$ 15,322,049
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	121,885,750
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	15,322,049
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	121,885,750
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	137,207,799
Accumulated Depreciation	0
Investment in Real Estate, Net	137,207,799
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Third Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	471
Initial Cost to Company, Land	$ 26,767,171
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	218,822,728
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,976,614
Gross Amount Carried at close of period 12/31/2021, Land	26,767,171
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	228,799,342
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	255,566,513
Accumulated Depreciation	(103,039,548)
Investment in Real Estate, Net	152,526,965
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Three20 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	134
Initial Cost to Company, Land	$ 7,030,766
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,005,762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,019,864
Gross Amount Carried at close of period 12/31/2021, Land	7,030,766
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,025,626
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,056,392
Accumulated Depreciation	(9,965,271)
Investment in Real Estate, Net	27,091,121
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Toscana [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	563
Initial Cost to Company, Land	$ 39,410,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	50,806,072
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	26,804,440
Gross Amount Carried at close of period 12/31/2021, Land	39,410,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	77,610,512
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	117,020,512
Accumulated Depreciation	(51,851,771)
Investment in Real Estate, Net	65,168,741
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Town Square at Mark Center I&II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	678
Initial Cost to Company, Land	$ 39,928,464
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	141,208,321
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,585,249
Gross Amount Carried at close of period 12/31/2021, Land	39,928,464
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	156,793,570
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	196,722,034
Accumulated Depreciation	(82,156,391)
Investment in Real Estate, Net	114,565,643
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Troy Boston [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	378
Initial Cost to Company, Land	$ 34,641,051
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	181,607,331
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,570,737
Gross Amount Carried at close of period 12/31/2021, Land	34,641,051
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	184,178,068
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	218,819,119
Accumulated Depreciation	(31,608,549)
Investment in Real Estate, Net	187,210,570
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Urbana (fka Market Street Landing) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	289
Initial Cost to Company, Land	$ 12,542,418
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	75,800,090
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,025,940
Gross Amount Carried at close of period 12/31/2021, Land	12,542,418
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	78,826,030
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	91,368,448
Accumulated Depreciation	(25,974,224)
Investment in Real Estate, Net	65,394,224
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Uwajimaya Village [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	176
Initial Cost to Company, Land	$ 8,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	22,188,288
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,003,692
Gross Amount Carried at close of period 12/31/2021, Land	8,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,191,980
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,991,980
Accumulated Depreciation	(15,062,661)
Investment in Real Estate, Net	21,929,319
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Veloce [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	322
Initial Cost to Company, Land	$ 15,322,724
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	76,176,594
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,403,261
Gross Amount Carried at close of period 12/31/2021, Land	15,322,724
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	78,579,855
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,902,579
Accumulated Depreciation	(28,242,511)
Investment in Real Estate, Net	65,660,068
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Venue at the Promenade [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Castle Rock, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	312
Initial Cost to Company, Land	$ 8,355,048
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	83,752,689
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	343,056
Gross Amount Carried at close of period 12/31/2021, Land	8,355,048
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,095,745
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,450,793
Accumulated Depreciation	(11,195,864)
Investment in Real Estate, Net	81,254,929
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Verde Condominium Homes (fka Mission Verde, LLC) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Jose, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	108
Initial Cost to Company, Land	$ 5,190,700
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,679,109
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,846,760
Gross Amount Carried at close of period 12/31/2021, Land	5,190,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	14,525,869
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	19,716,569
Accumulated Depreciation	(11,767,298)
Investment in Real Estate, Net	7,949,271
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Veridian (fka Silver Spring) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Silver Spring, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	457
Initial Cost to Company, Land	$ 18,539,817
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	130,407,365
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,769,828
Gross Amount Carried at close of period 12/31/2021, Land	18,539,817
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	135,177,193
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	153,717,010
Accumulated Depreciation	(58,024,618)
Investment in Real Estate, Net	95,692,392
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Versailles [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Woodland Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	253
Initial Cost to Company, Land	$ 12,650,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,656,292
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,731,475
Gross Amount Carried at close of period 12/31/2021, Land	12,650,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,387,767
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,037,767
Accumulated Depreciation	(27,656,992)
Investment in Real Estate, Net	27,380,775
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Versailles (K-Town) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	225
Initial Cost to Company, Land	$ 10,590,975
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,409,025
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,985,889
Gross Amount Carried at close of period 12/31/2021, Land	10,590,975
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,394,914
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,985,889
Accumulated Depreciation	(21,643,771)
Investment in Real Estate, Net	35,342,118
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Victor on Venice [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	115
Initial Cost to Company, Land	$ 10,350,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,433,437
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,802,294
Gross Amount Carried at close of period 12/31/2021, Land	10,350,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,235,731
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,585,731
Accumulated Depreciation	(19,744,025)
Investment in Real Estate, Net	28,841,706
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Villa Solana [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Laguna Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	272
Initial Cost to Company, Land	$ 1,665,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,985,677
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,409,554
Gross Amount Carried at close of period 12/31/2021, Land	1,665,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,395,231
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,060,331
Accumulated Depreciation	(24,244,498)
Investment in Real Estate, Net	5,815,833
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Village at Del Mar Heights, The (fka Del Mar Heights) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	168
Initial Cost to Company, Land	$ 15,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,859,396
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,812,705
Gross Amount Carried at close of period 12/31/2021, Land	15,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,672,101
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,772,101
Accumulated Depreciation	(16,691,542)
Investment in Real Estate, Net	43,080,559
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Virginia Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	231
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	85,940,003
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,245,382
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	92,185,385
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,185,385
Accumulated Depreciation	(33,233,676)
Investment in Real Estate, Net	58,951,709
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Vista 99 (fka Tasman) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Jose, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	554
Initial Cost to Company, Land	$ 27,709,329
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	177,556,948
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,080,962
Gross Amount Carried at close of period 12/31/2021, Land	27,709,329
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,637,910
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	206,347,239
Accumulated Depreciation	(41,109,307)
Investment in Real Estate, Net	165,237,932
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Vista Del Lago [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mission Viejo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	608
Initial Cost to Company, Land	$ 4,525,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,736,293
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,903,738
Gross Amount Carried at close of period 12/31/2021, Land	4,525,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	62,640,031
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	67,165,831
Accumulated Depreciation	(55,190,613)
Investment in Real Estate, Net	11,975,218
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Walden Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	232
Initial Cost to Company, Land	$ 12,448,888
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	52,044,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,341,555
Gross Amount Carried at close of period 12/31/2021, Land	12,448,888
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,386,003
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	69,834,891
Accumulated Depreciation	(25,275,403)
Investment in Real Estate, Net	44,559,488
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Water Park Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	362
Initial Cost to Company, Land	$ 34,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,485,859
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,902,949
Gross Amount Carried at close of period 12/31/2021, Land	34,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	121,388,808
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	155,788,808
Accumulated Depreciation	(44,465,434)
Investment in Real Estate, Net	111,323,374
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Watertown Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Watertown, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	134
Initial Cost to Company, Land	$ 16,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,074,056
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,350,073
Gross Amount Carried at close of period 12/31/2021, Land	16,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	36,424,129
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,224,129
Accumulated Depreciation	(12,910,211)
Investment in Real Estate, Net	40,313,918
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Weaver, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Austin, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	250
Initial Cost to Company, Land	$ 25,405,232
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,462,470
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	25,405,232
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,462,470
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,867,702
Accumulated Depreciation	0
Investment in Real Estate, Net	94,867,702
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
West 96th [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	207
Initial Cost to Company, Land	$ 84,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,055,501
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,730,725
Gross Amount Carried at close of period 12/31/2021, Land	84,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	74,786,226
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	159,586,226
Accumulated Depreciation	(28,904,295)
Investment in Real Estate, Net	130,681,931
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
West End Apartments (fka Emerson Place/CRP II) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	310
Initial Cost to Company, Land	$ 469,546
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	163,123,022
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,795,801
Gross Amount Carried at close of period 12/31/2021, Land	469,546
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	168,918,823
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	169,388,369
Accumulated Depreciation	(79,030,892)
Investment in Real Estate, Net	90,357,477
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westchester at Rockville [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Rockville, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	192
Initial Cost to Company, Land	$ 10,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,135,207
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,445,723
Gross Amount Carried at close of period 12/31/2021, Land	10,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,580,930
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,180,930
Accumulated Depreciation	(15,808,954)
Investment in Real Estate, Net	40,371,976
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westerly [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Dallas, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	331
Initial Cost to Company, Land	$ 11,958,829
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,131,722
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	11,958,829
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	79,131,722
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	91,090,551
Accumulated Depreciation	(1,663,331)
Investment in Real Estate, Net	89,427,220
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westmont [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	163
Initial Cost to Company, Land	$ 64,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,143,259
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,045,674
Gross Amount Carried at close of period 12/31/2021, Land	64,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	68,188,933
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	133,088,933
Accumulated Depreciation	(24,572,551)
Investment in Real Estate, Net	108,516,382
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	204
Initial Cost to Company, Land	$ 34,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,962,630
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,519,987
Gross Amount Carried at close of period 12/31/2021, Land	34,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,482,617
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,682,617
Accumulated Depreciation	(21,371,770)
Investment in Real Estate, Net	73,310,847
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Barrington (fka Westside Villas III) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	36
Initial Cost to Company, Land	$ 3,060,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,538,871
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,215,009
Gross Amount Carried at close of period 12/31/2021, Land	3,060,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	6,753,880
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	9,813,880
Accumulated Depreciation	(4,739,695)
Investment in Real Estate, Net	5,074,185
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Barry (fka Westside Villas VI) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	18
Initial Cost to Company, Land	$ 1,530,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,023,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	788,195
Gross Amount Carried at close of period 12/31/2021, Land	1,530,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	3,811,718
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	5,341,718
Accumulated Depreciation	(2,659,355)
Investment in Real Estate, Net	2,682,363
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Beloit (fka Westside Villas I) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	21
Initial Cost to Company, Land	$ 1,785,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,233,254
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	828,098
Gross Amount Carried at close of period 12/31/2021, Land	1,785,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,061,352
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	5,846,352
Accumulated Depreciation	(2,875,530)
Investment in Real Estate, Net	2,970,822
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Bundy (fka Westside Villas II) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	23
Initial Cost to Company, Land	$ 1,955,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,541,435
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	819,978
Gross Amount Carried at close of period 12/31/2021, Land	1,955,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,361,413
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	6,316,413
Accumulated Depreciation	(3,052,276)
Investment in Real Estate, Net	3,264,137
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Butler (fka Westside Villas IV) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	36
Initial Cost to Company, Land	$ 3,060,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,539,390
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,250,519
Gross Amount Carried at close of period 12/31/2021, Land	3,060,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	6,789,909
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	9,849,909
Accumulated Depreciation	(4,771,162)
Investment in Real Estate, Net	5,078,747
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Westside Villas (fka Westside Villas V &VII) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	113
Initial Cost to Company, Land	$ 9,605,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	19,983,385
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,074,521
Gross Amount Carried at close of period 12/31/2021, Land	9,605,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,057,906
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,662,906
Accumulated Depreciation	(15,896,472)
Investment in Real Estate, Net	16,766,434
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Windridge (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Laguna Niguel, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	344
Initial Cost to Company, Land	$ 2,662,900
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,985,497
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,392,574
Gross Amount Carried at close of period 12/31/2021, Land	2,662,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,378,071
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,040,971
Accumulated Depreciation	(32,468,218)
Investment in Real Estate, Net	7,572,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Woodleaf [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Campbell, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	178
Initial Cost to Company, Land	$ 8,550,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,988,182
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,239,245
Gross Amount Carried at close of period 12/31/2021, Land	8,550,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,227,427
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,778,027
Accumulated Depreciation	(18,367,471)
Investment in Real Estate, Net	14,410,556
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Zephyr on the Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	193
Initial Cost to Company, Land	$ 15,637,106
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	89,960,836
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	47,523
Gross Amount Carried at close of period 12/31/2021, Land	15,637,106
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,008,359
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	105,645,465
Accumulated Depreciation	(3,050,772)
Investment in Real Estate, Net	102,594,693
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Management Business [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chicago, IL
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	139,672,539
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	139,672,539
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	139,672,539
Accumulated Depreciation	(108,884,370)
Investment in Real Estate, Net	30,788,169
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Operating Partnership [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chicago, IL
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,447,587
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	1,447,587
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	1,447,587
Accumulated Depreciation	0
Investment in Real Estate, Net	1,447,587
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Other [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	N/A
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	109,837
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	109,837
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,837
Accumulated Depreciation	(85,278)
Investment in Real Estate, Net	24,559
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Wholly Owned Unencumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	67,748
Initial Cost to Company, Land	$ 4,942,884,454
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,209,707,547
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,700,307,269
Gross Amount Carried at close of period 12/31/2021, Land	4,942,884,454
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,910,014,816
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,852,899,270
Accumulated Depreciation	(7,039,743,046)
Investment in Real Estate, Net	16,813,156,224
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
1111 Belle Pre (fka The Madison) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	360
Initial Cost to Company, Land	$ 18,937,702
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	94,758,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	817,533
Gross Amount Carried at close of period 12/31/2021, Land	18,937,702
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,576,212
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	114,513,914
Accumulated Depreciation	(31,780,060)
Investment in Real Estate, Net	82,733,854
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 86,298,662
2501 Porter [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	202
Initial Cost to Company, Land	$ 13,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	75,271,179
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,260,524
Gross Amount Carried at close of period 12/31/2021, Land	13,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	82,531,703
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,531,703
Accumulated Depreciation	(30,707,382)
Investment in Real Estate, Net	$ 64,824,321
300 East 39th (fka East 39th) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	254
Initial Cost to Company, Land	$ 48,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	96,174,639
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,988,547
Gross Amount Carried at close of period 12/31/2021, Land	48,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,163,186
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	152,063,186
Accumulated Depreciation	(36,436,305)
Investment in Real Estate, Net	115,626,881
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 63,205,738
303 East 83rd (fka Camargue) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	261
Initial Cost to Company, Land	$ 79,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,122,624
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	12,346,139
Gross Amount Carried at close of period 12/31/2021, Land	79,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	91,468,763
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	170,868,763
Accumulated Depreciation	(34,205,778)
Investment in Real Estate, Net	$ 136,662,985
425 Broadway [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Monica, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	101
Initial Cost to Company, Land	$ 12,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,394,772
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,952,205
Gross Amount Carried at close of period 12/31/2021, Land	12,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,346,977
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,946,977
Accumulated Depreciation	(14,054,927)
Investment in Real Estate, Net	$ 36,892,050
Alcyone [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 11,379,497
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	49,360,503
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,913,197
Gross Amount Carried at close of period 12/31/2021, Land	11,379,497
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,273,700
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	62,653,197
Accumulated Depreciation	(15,405,573)
Investment in Real Estate, Net	47,247,624
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 26,163,830
Artisan Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Northridge, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	140
Initial Cost to Company, Land	$ 7,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,537,359
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,774,707
Gross Amount Carried at close of period 12/31/2021, Land	7,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,312,066
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,312,066
Accumulated Depreciation	(14,819,685)
Investment in Real Estate, Net	15,492,381
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 35,626,749
Avanti [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Anaheim, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 12,960,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,497,683
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,270,611
Gross Amount Carried at close of period 12/31/2021, Land	12,960,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,768,294
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,728,294
Accumulated Depreciation	(13,049,192)
Investment in Real Estate, Net	22,679,102
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,044,297
Avenir Apartments [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	241
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,321,619
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,568,840
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	121,890,459
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	121,890,459
Accumulated Depreciation	(41,528,064)
Investment in Real Estate, Net	80,362,395
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 81,652,924
Calvert Woodley [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	136
Initial Cost to Company, Land	$ 12,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,527,379
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,920,318
Gross Amount Carried at close of period 12/31/2021, Land	12,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,447,697
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,047,697
Accumulated Depreciation	(16,564,329)
Investment in Real Estate, Net	$ 42,483,368
City Pointe [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fullerton, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	183
Initial Cost to Company, Land	$ 6,863,792
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,476,208
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,386,136
Gross Amount Carried at close of period 12/31/2021, Land	6,863,792
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,862,344
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	47,726,136
Accumulated Depreciation	(18,504,841)
Investment in Real Estate, Net	29,221,295
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 39,624,887
Cleveland House [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	214
Initial Cost to Company, Land	$ 18,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	66,392,414
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,599,298
Gross Amount Carried at close of period 12/31/2021, Land	18,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,991,712
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,291,712
Accumulated Depreciation	(25,944,969)
Investment in Real Estate, Net	$ 66,346,743
Elevé [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Glendale, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	208
Initial Cost to Company, Land	$ 14,080,560
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,419,440
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,363,125
Gross Amount Carried at close of period 12/31/2021, Land	14,080,560
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,782,565
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	71,863,125
Accumulated Depreciation	(18,219,994)
Investment in Real Estate, Net	53,643,131
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 38,397,494
Estancia at Santa Clara (fka Santa Clara) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Clara, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	450
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	123,759,804
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,394,578
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	127,154,382
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,154,382
Accumulated Depreciation	(45,289,007)
Investment in Real Estate, Net	$ 81,865,375
Fairchase [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	392
Initial Cost to Company, Land	$ 23,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	87,722,321
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,216,170
Gross Amount Carried at close of period 12/31/2021, Land	23,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,938,491
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,438,491
Accumulated Depreciation	(30,699,514)
Investment in Real Estate, Net	$ 82,738,977
Flats at DuPont Circle [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units | ApartmentUnit	306
Initial Cost to Company, Land	$ 35,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,768,198
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,462,784
Gross Amount Carried at close of period 12/31/2021, Land	35,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	113,230,982
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,430,982
Accumulated Depreciation	(37,753,595)
Investment in Real Estate, Net	$ 110,677,387
Glo [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	201
Initial Cost to Company, Land	$ 16,047,023
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	48,650,963
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,090,835
Gross Amount Carried at close of period 12/31/2021, Land	16,047,023
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	52,741,798
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,788,821
Accumulated Depreciation	(21,760,967)
Investment in Real Estate, Net	47,027,854
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 32,704,395
Heights on Capitol Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	104
Initial Cost to Company, Land	$ 5,425,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,138,028
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,124,990
Gross Amount Carried at close of period 12/31/2021, Land	5,425,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,263,018
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,688,018
Accumulated Depreciation	(12,467,148)
Investment in Real Estate, Net	16,220,870
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 22,586,660
Kelvin Court (fka Alta Pacific) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	132
Initial Cost to Company, Land	$ 10,752,145
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,846,856
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,083,930
Gross Amount Carried at close of period 12/31/2021, Land	10,752,145
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,930,786
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,682,931
Accumulated Depreciation	(16,927,083)
Investment in Real Estate, Net	29,755,848
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 26,258,149
Kenwood Mews [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burbank, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	141
Initial Cost to Company, Land	$ 14,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,662,883
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,383,683
Gross Amount Carried at close of period 12/31/2021, Land	14,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,046,566
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,146,566
Accumulated Depreciation	(17,007,785)
Investment in Real Estate, Net	26,138,781
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,626,316
La Terrazza at Colma Station [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Colma, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	155
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	41,251,044
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,175,723
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,426,767
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,426,767
Accumulated Depreciation	(23,081,823)
Investment in Real Estate, Net	22,344,944
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 25,029,507
Lindley Apartments [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Encino, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	129
Initial Cost to Company, Land	$ 5,805,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,705,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,288,945
Gross Amount Carried at close of period 12/31/2021, Land	5,805,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,993,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,798,945
Accumulated Depreciation	(12,248,777)
Investment in Real Estate, Net	21,550,168
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,042,734
Lofts 590 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	212
Initial Cost to Company, Land	$ 20,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,909,023
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,125,639
Gross Amount Carried at close of period 12/31/2021, Land	20,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,034,662
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	89,134,662
Accumulated Depreciation	(22,984,204)
Investment in Real Estate, Net	66,150,458
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 43,012,615
Longview Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Waltham, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	348
Initial Cost to Company, Land	$ 20,880,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	90,255,509
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,702,122
Gross Amount Carried at close of period 12/31/2021, Land	20,880,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,957,631
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	124,837,631
Accumulated Depreciation	(57,354,859)
Investment in Real Estate, Net	67,482,772
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 84,280,484
Metro on First [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	102
Initial Cost to Company, Land	$ 8,540,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,209,981
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,804,678
Gross Amount Carried at close of period 12/31/2021, Land	8,540,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,014,659
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,554,659
Accumulated Depreciation	(8,458,788)
Investment in Real Estate, Net	15,095,871
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 21,491,495
Moda [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	251
Initial Cost to Company, Land	$ 12,649,228
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	36,842,012
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,379,781
Gross Amount Carried at close of period 12/31/2021, Land	12,649,228
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,221,793
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	51,871,021
Accumulated Depreciation	(17,514,997)
Investment in Real Estate, Net	$ 34,356,024
Montierra (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	272
Initial Cost to Company, Land	$ 8,160,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,360,938
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,961,784
Gross Amount Carried at close of period 12/31/2021, Land	8,160,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,322,722
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,482,722
Accumulated Depreciation	(28,873,699)
Investment in Real Estate, Net	17,609,023
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 61,025,383
Notch [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Newcastle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	158
Initial Cost to Company, Land	$ 5,463,324
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,490,989
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	85,422
Gross Amount Carried at close of period 12/31/2021, Land	5,463,324
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,576,411
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,039,735
Accumulated Depreciation	(3,437,360)
Investment in Real Estate, Net	45,602,375
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Old Town Lofts [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Redmond, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	149
Initial Cost to Company, Land	$ 7,740,467
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,146,181
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,094,490
Gross Amount Carried at close of period 12/31/2021, Land	7,740,467
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,240,671
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,981,138
Accumulated Depreciation	(12,234,825)
Investment in Real Estate, Net	40,746,313
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 35,570,767
Olympus Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	328
Initial Cost to Company, Land	$ 14,752,034
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	73,335,425
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	13,511,615
Gross Amount Carried at close of period 12/31/2021, Land	14,752,034
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,847,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	101,599,074
Accumulated Depreciation	(53,348,127)
Investment in Real Estate, Net	48,250,947
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 94,751,556
Park Place at San Mateo (fka San Mateo) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	575
Initial Cost to Company, Land	$ 71,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	211,907,141
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	16,378,744
Gross Amount Carried at close of period 12/31/2021, Land	71,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	228,285,885
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	300,185,885
Accumulated Depreciation	(81,177,243)
Investment in Real Estate, Net	$ 219,008,642
Skyhouse Denver [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Denver, CO
Real Estate And Accumulated Depreciation Units | ApartmentUnit	354
Initial Cost to Company, Land	$ 13,562,331
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	126,360,318
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,107,660
Gross Amount Carried at close of period 12/31/2021, Land	13,562,331
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	127,467,978
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	141,030,309
Accumulated Depreciation	(20,582,877)
Investment in Real Estate, Net	120,447,432
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 74,189,118
SoMa Square Apartments (fka South Market) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	410
Initial Cost to Company, Land	$ 79,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	177,316,977
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	18,046,831
Gross Amount Carried at close of period 12/31/2021, Land	79,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	195,363,808
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	275,263,808
Accumulated Depreciation	(68,367,690)
Investment in Real Estate, Net	$ 206,896,118
Teresina [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chula Vista, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	440
Initial Cost to Company, Land	$ 28,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	61,916,670
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,465,472
Gross Amount Carried at close of period 12/31/2021, Land	28,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	70,382,142
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	98,982,142
Accumulated Depreciation	(39,200,260)
Investment in Real Estate, Net	59,781,882
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,940,000
Vantage Hollywood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	298
Initial Cost to Company, Land	$ 42,580,326
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,014,674
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,728,870
Gross Amount Carried at close of period 12/31/2021, Land	42,580,326
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	59,743,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	102,323,870
Accumulated Depreciation	(18,335,134)
Investment in Real Estate, Net	83,988,736
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,537,003
Vintage [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ontario, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	300
Initial Cost to Company, Land	$ 7,059,230
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,677,762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,278,751
Gross Amount Carried at close of period 12/31/2021, Land	7,059,230
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,956,513
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,015,743
Accumulated Depreciation	(26,867,509)
Investment in Real Estate, Net	30,148,234
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 49,136,797
Vintage at 425 Broadway (fka Promenade) [Memebr]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Monica, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	60
Initial Cost to Company, Land	$ 9,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,961,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,985,863
Gross Amount Carried at close of period 12/31/2021, Land	9,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,947,386
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,947,386
Accumulated Depreciation	(6,073,401)
Investment in Real Estate, Net	$ 18,873,985
West 54th [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units | ApartmentUnit	222
Initial Cost to Company, Land	$ 60,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	48,193,837
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,900,079
Gross Amount Carried at close of period 12/31/2021, Land	60,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	53,093,916
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,993,916
Accumulated Depreciation	(20,838,067)
Investment in Real Estate, Net	93,155,849
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 49,701,588
Portfolio/Entity Encumbrances [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	0
Accumulated Depreciation	0
Investment in Real Estate, Net	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 799,153,560
Investment in Real Estate - Wholly Owned Encumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	9,113
Initial Cost to Company, Land	$ 778,637,659
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,442,658,555
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	192,940,619
Gross Amount Carried at close of period 12/31/2021, Land	778,637,659
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	2,635,599,174
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	3,414,236,833
Accumulated Depreciation	(1,014,105,838)
Investment in Real Estate, Net	2,400,130,995
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 1,959,052,708
2300 Elliott [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	92
Initial Cost to Company, Land	$ 796,800
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,173,725
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,998,442
Gross Amount Carried at close of period 12/31/2021, Land	796,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,172,167
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,968,967
Accumulated Depreciation	(12,907,247)
Investment in Real Estate, Net	3,061,720
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bellevue Meadows [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	180
Initial Cost to Company, Land	$ 4,507,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,574,814
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,405,508
Gross Amount Carried at close of period 12/31/2021, Land	4,507,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,980,322
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,487,422
Accumulated Depreciation	(15,232,652)
Investment in Real Estate, Net	8,254,770
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Canyon Ridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	162
Initial Cost to Company, Land	$ 4,869,448
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,955,063
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,338,392
Gross Amount Carried at close of period 12/31/2021, Land	4,869,448
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	16,293,455
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	21,162,903
Accumulated Depreciation	(13,111,514)
Investment in Real Estate, Net	8,051,389
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Country Oaks [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Agoura Hills, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	256
Initial Cost to Company, Land	$ 6,105,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,561,865
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,744,470
Gross Amount Carried at close of period 12/31/2021, Land	6,105,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,306,335
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,411,335
Accumulated Depreciation	(25,320,149)
Investment in Real Estate, Net	18,091,186
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Harrison Square (fka Elliot Bay) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	166
Initial Cost to Company, Land	$ 7,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,844,345
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,184,547
Gross Amount Carried at close of period 12/31/2021, Land	7,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,028,892
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,628,892
Accumulated Depreciation	(16,285,713)
Investment in Real Estate, Net	33,343,179
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Lantern Cove [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foster City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	232
Initial Cost to Company, Land	$ 6,945,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,064,976
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,636,723
Gross Amount Carried at close of period 12/31/2021, Land	6,945,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,701,699
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,646,699
Accumulated Depreciation	(22,406,448)
Investment in Real Estate, Net	16,240,251
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Radius Koreatown [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	301
Initial Cost to Company, Land	$ 32,494,154
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	84,645,202
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	640,890
Gross Amount Carried at close of period 12/31/2021, Land	32,494,154
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,286,092
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	117,780,246
Accumulated Depreciation	(18,649,423)
Investment in Real Estate, Net	99,130,823
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rosecliff [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Quincy, MA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	156
Initial Cost to Company, Land	$ 5,460,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,721,570
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,177,947
Gross Amount Carried at close of period 12/31/2021, Land	5,460,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,899,517
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,359,517
Accumulated Depreciation	(15,599,076)
Investment in Real Estate, Net	10,760,441
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Schooner Bay I [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foster City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	168
Initial Cost to Company, Land	$ 5,345,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,390,618
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,976,491
Gross Amount Carried at close of period 12/31/2021, Land	5,345,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,367,109
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,712,109
Accumulated Depreciation	(19,122,126)
Investment in Real Estate, Net	14,589,983
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Schooner Bay II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Foster City, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	144
Initial Cost to Company, Land	$ 4,550,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,064,764
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,043,955
Gross Amount Carried at close of period 12/31/2021, Land	4,550,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,108,719
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	29,658,719
Accumulated Depreciation	(16,966,296)
Investment in Real Estate, Net	12,692,423
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
St Johns West [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Austin, TX
Real Estate And Accumulated Depreciation Units | ApartmentUnit	297
Initial Cost to Company, Land	$ 10,097,109
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	47,926,778
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	23,181
Gross Amount Carried at close of period 12/31/2021, Land	10,097,109
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,949,959
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	58,047,068
Accumulated Depreciation	(3,613,948)
Investment in Real Estate, Net	54,433,120
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Venn at Main [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	350
Initial Cost to Company, Land	$ 26,626,497
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	151,520,448
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	722,931
Gross Amount Carried at close of period 12/31/2021, Land	26,626,497
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	152,243,379
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	178,869,876
Accumulated Depreciation	(27,128,523)
Investment in Real Estate, Net	151,741,353
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Virgil Square [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	142
Initial Cost to Company, Land	$ 5,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,216,613
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,995,308
Gross Amount Carried at close of period 12/31/2021, Land	5,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,211,921
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,711,921
Accumulated Depreciation	(11,537,883)
Investment in Real Estate, Net	13,174,038
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Partially Owned Unencumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	2,646
Initial Cost to Company, Land	$ 120,896,108
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	473,660,781
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	66,888,785
Gross Amount Carried at close of period 12/31/2021, Land	120,896,108
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	540,549,566
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	661,445,674
Accumulated Depreciation	(217,880,998)
Investment in Real Estate, Net	443,564,676
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
9th & W [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, DC
Real Estate And Accumulated Depreciation Units | ApartmentUnit	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,306,736
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,306,736
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,306,736
Accumulated Depreciation	0
Investment in Real Estate, Net	24,306,736
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 1,772,313
Aero Apartments [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alameda, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	200
Initial Cost to Company, Land	$ 13,107,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	100,253,427
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,272
Gross Amount Carried at close of period 12/31/2021, Land	13,107,242
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	100,286,699
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,393,941
Accumulated Depreciation	(2,386,616)
Investment in Real Estate, Net	111,007,325
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 61,662,484
Canyon Creek (CA) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Ramon, CA
Real Estate And Accumulated Depreciation Units | ApartmentUnit	268
Initial Cost to Company, Land	$ 5,425,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,812,120
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,423,666
Gross Amount Carried at close of period 12/31/2021, Land	5,425,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,235,786
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,660,786
Accumulated Depreciation	(20,255,679)
Investment in Real Estate, Net	12,405,107
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,208,225
Wisconsin Place [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chevy Chase, MD
Real Estate And Accumulated Depreciation Units | ApartmentUnit	432
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	172,089,355
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,873,790
Gross Amount Carried at close of period 12/31/2021, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	173,963,145
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,963,145
Accumulated Depreciation	(59,910,024)
Investment in Real Estate, Net	114,053,121
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 144,049,913
Partially Owned Encumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	900
Initial Cost to Company, Land	$ 18,532,242
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	315,461,638
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,330,728
Gross Amount Carried at close of period 12/31/2021, Land	18,532,242
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	325,792,366
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	344,324,608
Accumulated Depreciation	(82,552,319)
Investment in Real Estate, Net	261,772,289
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 232,148,309
Total Consolidated Investment in Real Estate [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units | ApartmentUnit	80,407
Initial Cost to Company, Land	$ 5,860,950,463
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,441,488,521
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,970,467,401
Gross Amount Carried at close of period 12/31/2021, Land	5,860,950,463
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,411,955,922
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,272,906,385
Accumulated Depreciation	(8,354,282,201)
Investment in Real Estate, Net	19,918,624,184
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 2,191,201,017

Schedule III - Real Estate an_8

Schedule III - Real Estate and Accumulated Depreciation (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Real Estate And Accumulated Depreciation [Line Items]
Furniture, fixtures and equipment	$ 2,220,203,000	$ 1,970,033,000
Land and depreciable property net	13,200,000,000	$ 13,800,000,000
Depreciable Property [Member]
Real Estate And Accumulated Depreciation [Line Items]
Furniture, fixtures and equipment	$ 2,220,203,083
Building [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	30 years
Renovations and Improvements Minimum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	5 years
Renovations and Improvements Maximum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	15 years
Replacements Minimum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	5 years
Replacements Maximum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	10 years
Management Business Renovations and Improvements Minimum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	3 years
Management Business Renovations and Improvements Maximum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	7 years