Erp Operating LTD Partnership 10-K 23 Feb 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 17, 2017	Jun. 30, 2016
Entity Registrant Name	EQUITY RESIDENTIAL
Entity Central Index Key	906,107
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Amendment Flag	false
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
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 Common Stock, Shares Outstanding		367,097,667
Entity Public Float			$ 24,800,000,000
ERPOP [Member]
Entity Registrant Name	ERP OPERATING LIMITED PARTNERSHIP
Entity Central Index Key	931,182
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Amendment Flag	false
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
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

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investment in real estate
Land	$ 5,899,862	$ 5,864,046
Depreciable property	18,730,579	18,037,087
Projects under development	637,168	1,122,376
Land held for development	118,816	158,843
Investment in real estate	25,386,425	25,182,352
Accumulated depreciation	(5,360,389)	(4,905,406)
Investment in real estate, net	20,026,036	20,276,946
Real estate held for sale	0	2,181,135
Cash and cash equivalents	77,207	42,276
Investments in unconsolidated entities	60,141	68,101
Deposits – restricted	76,946	55,893
Escrow deposits – mortgage	64,935	56,946
Other assets	398,883	428,899
Total assets	20,704,148	23,110,196
Liabilities:
Mortgage notes payable	4,119,181	4,685,134
Notes, net	4,848,079	5,848,956
Line of credit and commercial paper	19,998	387,276
Accounts payable and accrued expenses	147,482	187,124
Accrued interest payable	60,946	85,221
Other liabilities	350,466	366,387
Security deposits	62,624	77,582
Distributions payable	192,296	209,378
Total liabilities	9,801,072	11,847,058
Commitments and contingencies
Redeemable Noncontrolling Interests – Operating Partnership	442,092	566,783
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, 2016 and December 31, 2015	37,280	37,280
Common Shares of beneficial interest, $0.01 par value; 1,000,000,000 shares authorized; 365,870,924 shares issued and outstanding as of December 31, 2016 and 364,755,444 shares issued and outstanding as of December 31, 2015	3,659	3,648
Paid in capital	8,758,422	8,572,365
Retained earnings	1,543,626	2,009,091
Accumulated other comprehensive (loss)	(113,909)	(152,016)
Total shareholders' equity	10,229,078	10,470,368
Noncontrolling Interests:
Operating Partnership	221,297	221,379
Partially Owned Properties	10,609	4,608
Total Noncontrolling Interests	231,906	225,987
Total equity/capital	10,460,984	10,696,355
Total liabilities and equity/capital	$ 20,704,148	$ 23,110,196

CONSOLIDATED BALANCE SHEETS CON

CONSOLIDATED BALANCE SHEETS CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
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	365,870,924	364,755,444
Common Stock, Shares, Outstanding	365,870,924	364,755,444

CONSOLIDATED BALANCE SHEETS OF

CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investment in real estate
Land	$ 5,899,862	$ 5,864,046
Depreciable property	18,730,579	18,037,087
Projects under development	637,168	1,122,376
Land held for development	118,816	158,843
Investment in real estate	25,386,425	25,182,352
Accumulated depreciation	(5,360,389)	(4,905,406)
Investment in real estate, net	20,026,036	20,276,946
Real estate held for sale	0	2,181,135
Cash and cash equivalents	77,207	42,276
Investments in unconsolidated entities	60,141	68,101
Deposits – restricted	76,946	55,893
Escrow deposits – mortgage	64,935	56,946
Other assets	398,883	428,899
Total assets	20,704,148	23,110,196
Liabilities:
Mortgage notes payable	4,119,181	4,685,134
Notes, net	4,848,079	5,848,956
Line of credit and commercial paper	19,998	387,276
Accounts payable and accrued expenses	147,482	187,124
Accrued interest payable	60,946	85,221
Other liabilities	350,466	366,387
Security deposits	62,624	77,582
Distributions payable	192,296	209,378
Total liabilities	9,801,072	11,847,058
Commitments and contingencies
Partners' Capital:
Accumulated other comprehensive (loss)	(113,909)	(152,016)
Partially Owned Properties	10,609	4,608
Total liabilities and equity/capital	20,704,148	23,110,196
ERPOP [Member]
Investment in real estate
Land	5,899,862	5,864,046
Depreciable property	18,730,579	18,037,087
Projects under development	637,168	1,122,376
Land held for development	118,816	158,843
Investment in real estate	25,386,425	25,182,352
Accumulated depreciation	(5,360,389)	(4,905,406)
Investment in real estate, net	20,026,036	20,276,946
Real estate held for sale	0	2,181,135
Cash and cash equivalents	77,207	42,276
Investments in unconsolidated entities	60,141	68,101
Deposits – restricted	76,946	55,893
Escrow deposits – mortgage	64,935	56,946
Other assets	398,883	428,899
Total assets	20,704,148	23,110,196
Liabilities:
Mortgage notes payable	4,119,181	4,685,134
Notes, net	4,848,079	5,848,956
Line of credit and commercial paper	19,998	387,276
Accounts payable and accrued expenses	147,482	187,124
Accrued interest payable	60,946	85,221
Other liabilities	350,466	366,387
Security deposits	62,624	77,582
Distributions payable	192,296	209,378
Total liabilities	9,801,072	11,847,058
Commitments and contingencies
Redeemable Limited Partners	442,092	566,783
Partners' Capital:
Preference Units	37,280	37,280
General Partner	10,305,707	10,585,104
Limited Partners	221,297	221,379
Accumulated other comprehensive (loss)	(113,909)	(152,016)
Total partners' capital	10,450,375	10,691,747
Partially Owned Properties	10,609	4,608
Total capital	10,460,984	10,696,355
Total liabilities and equity/capital	$ 20,704,148	$ 23,110,196

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Fee and asset management	3,567	8,387	9,437
Total revenues	2,425,800	2,744,965	2,614,748
EXPENSES
Property and maintenance	406,823	479,160	473,098
Real estate taxes and insurance	317,387	339,802	325,401
Property management	82,015	86,206	85,065
General and administrative	57,840	64,664	50,679
Depreciation	705,649	765,895	758,861
Total expenses	1,569,714	1,735,727	1,693,104
Operating income	856,086	1,009,238	921,644
Interest and other income	65,773	7,372	4,462
Other expenses	(10,368)	(2,942)	(9,073)
Interest:
Expense incurred, net	(482,246)	(444,487)	(457,460)
Amortization of deferred financing costs	(12,633)	(10,801)	(11,088)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	416,612	558,380	448,485
Income and other tax (expense) benefit	(1,613)	(917)	(1,394)
Income (loss) from investments in unconsolidated entities	4,801	15,025	(7,952)
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net gain (loss) on sales of land parcels	15,731	(1)	5,277
Income from continuing operations	4,479,586	907,621	657,101
Discontinued operations, net	518	397	1,582
Net income	4,480,104	908,018	658,683
Net (income) attributable to Noncontrolling Interests:
Operating Partnership	(171,511)	(34,241)	(24,831)
Partially Owned Properties	(16,430)	(3,657)	(2,544)
Net income attributable to controlling interests	4,292,163	870,120	631,308
Preferred distributions	(3,091)	(3,357)	(4,145)
Premium on redemption of Preferred Shares	0	(3,486)	0
Net income available to Common Shares	$ 4,289,072	$ 863,277	$ 627,163
Earnings per share – basic:
Income from continuing operations available to Common Shares	$ 11.75	$ 2.37	$ 1.73
Net income available to Common Shares	$ 11.75	$ 2.37	$ 1.74
Weighted average Common Shares outstanding	365,002	363,498	361,181
Earnings per share – diluted:
Income from continuing operations available to Common Shares	$ 11.68	$ 2.36	$ 1.72
Net income available to Common Shares	$ 11.68	$ 2.36	$ 1.73
Weighted average Common Shares outstanding	381,992	380,620	377,735
Distributions declared per Common Share outstanding	$ 13.015	$ 2.210	$ 2

CONSOLIDATED STATEMENTS OF OPE6

CONSOLIDATED STATEMENTS OF OPERATIONS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Fee and asset management	3,567	8,387	9,437
Total revenues	2,425,800	2,744,965	2,614,748
EXPENSES
Property and maintenance	406,823	479,160	473,098
Real estate taxes and insurance	317,387	339,802	325,401
Property management	82,015	86,206	85,065
General and administrative	57,840	64,664	50,679
Depreciation	705,649	765,895	758,861
Total expenses	1,569,714	1,735,727	1,693,104
Operating income	856,086	1,009,238	921,644
Interest and other income	65,773	7,372	4,462
Other expenses	(10,368)	(2,942)	(9,073)
Interest:
Expense incurred, net	(482,246)	(444,487)	(457,460)
Amortization of deferred financing costs	(12,633)	(10,801)	(11,088)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	416,612	558,380	448,485
Income and other tax (expense) benefit	(1,613)	(917)	(1,394)
Income (loss) from investments in unconsolidated entities	4,801	15,025	(7,952)
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net gain (loss) on sales of land parcels	15,731	(1)	5,277
Income from continuing operations	4,479,586	907,621	657,101
Discontinued operations, net	518	397	1,582
Net income	4,480,104	908,018	658,683
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Net income attributable to controlling interests	4,292,163	870,120	631,308
ALLOCATION OF NET INCOME:
Premium on redemption of Preference Units	$ 0	$ (3,486)	$ 0
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 11.75	$ 2.37	$ 1.73
Net income available to Units	11.75	2.37	1.74
Earnings per Unit – diluted:
Income from continuing operations available to Units	11.68	2.36	1.72
Net income available to Units	$ 11.68	$ 2.36	$ 1.73
Weighted average Units outstanding	381,992	380,620	377,735
ERPOP [Member]
REVENUES
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Fee and asset management	3,567	8,387	9,437
Total revenues	2,425,800	2,744,965	2,614,748
EXPENSES
Property and maintenance	406,823	479,160	473,098
Real estate taxes and insurance	317,387	339,802	325,401
Property management	82,015	86,206	85,065
General and administrative	57,840	64,664	50,679
Depreciation	705,649	765,895	758,861
Total expenses	1,569,714	1,735,727	1,693,104
Operating income	856,086	1,009,238	921,644
Interest and other income	65,773	7,372	4,462
Other expenses	(10,368)	(2,942)	(9,073)
Interest:
Expense incurred, net	(482,246)	(444,487)	(457,460)
Amortization of deferred financing costs	(12,633)	(10,801)	(11,088)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	416,612	558,380	448,485
Income and other tax (expense) benefit	(1,613)	(917)	(1,394)
Income (loss) from investments in unconsolidated entities	4,801	15,025	(7,952)
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net gain (loss) on sales of land parcels	15,731	(1)	5,277
Income from continuing operations	4,479,586	907,621	657,101
Discontinued operations, net	518	397	1,582
Net income	4,480,104	908,018	658,683
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Net income attributable to controlling interests	4,463,674	904,361	656,139
ALLOCATION OF NET INCOME:
Preference Units	3,091	3,357	4,145
Premium on redemption of Preference Units	0	3,486	0
General Partner	4,289,072	863,277	627,163
Limited Partners	171,511	34,241	24,831
Net income available to Units	$ 4,460,583	$ 897,518	$ 651,994
Earnings per Unit – basic:
Income from continuing operations available to Units	$ 11.75	$ 2.37	$ 1.73
Net income available to Units	$ 11.75	$ 2.37	$ 1.74
Weighted average Units outstanding	378,829	377,074	374,899
Earnings per Unit – diluted:
Income from continuing operations available to Units	$ 11.68	$ 2.36	$ 1.72
Net income available to Units	$ 11.68	$ 2.36	$ 1.73
Weighted average Units outstanding	381,992	380,620	377,735
Distributions declared per Unit outstanding	$ 13.015	$ 2.21	$ 2

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Comprehensive income:
Net income	$ 4,480,104	$ 908,018	$ 658,683
Other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	(3,915)	2,219	(33,306)
Losses reclassified into earnings from other comprehensive income	41,758	18,244	16,868
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	264	(327)	(552)
Other comprehensive income (loss)	38,107	20,136	(16,990)
Comprehensive income	4,518,211	928,154	641,693
Comprehensive (income) attributable to Noncontrolling Interests	(189,411)	(38,668)	(26,728)
Comprehensive income attributable to controlling interests	$ 4,328,800	$ 889,486	$ 614,965

CONSOLIDATED STATEMENTS OF COM8

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 4,480,104	$ 908,018	$ 658,683
Other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	(3,915)	2,219	(33,306)
Losses reclassified into earnings from other comprehensive income	41,758	18,244	16,868
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	264	(327)	(552)
Other comprehensive income (loss)	38,107	20,136	(16,990)
Comprehensive income	4,518,211	928,154	641,693
Comprehensive (income) attributable to Noncontrolling Interests	(189,411)	(38,668)	(26,728)
Comprehensive income attributable to controlling interests	4,328,800	889,486	614,965
ERPOP [Member]
Net income	4,480,104	908,018	658,683
Other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	(3,915)	2,219	(33,306)
Losses reclassified into earnings from other comprehensive income	41,758	18,244	16,868
Other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	264	(327)	(552)
Other comprehensive income (loss)	38,107	20,136	(16,990)
Comprehensive income	4,518,211	928,154	641,693
Comprehensive (income) attributable to Noncontrolling Interests	(16,430)	(3,657)	(2,544)
Comprehensive income attributable to controlling interests	$ 4,501,781	$ 924,497	$ 639,149

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 4,480,104	$ 908,018	$ 658,683
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	705,649	765,895	758,861
Amortization of deferred financing costs	12,633	10,801	11,088
Amortization of above/below market leases	3,426	3,382	3,222
Amortization of discounts and premiums on debt	(17,378)	(9,492)	(13,520)
Amortization of deferred settlements on derivative instruments	41,680	18,075	16,334
Write-off of pursuit costs	4,092	3,208	3,607
(Income) loss from investments in unconsolidated entities	(4,801)	(15,025)	7,952
Distributions from unconsolidated entities – return on capital	2,863	4,741	5,570
Net (gain) on sales of investment securities and other investments	(58,409)	(526)	(57)
Net (gain) on sales of real estate properties	(4,044,055)	(335,134)	(212,685)
Net (gain) loss on sales of land parcels	(15,731)	1	(5,277)
Net (gain) on sales of discontinued operations	(43)	0	(179)
Realized/unrealized loss (gain) on derivative instruments	74	3,055	(60)
Compensation paid with Company Common Shares	30,530	34,607	27,543
Changes in assets and liabilities:
Decrease (increase) in deposits – restricted	11,450	(1,794)	(1,740)
(Increase) decrease in mortgage deposits	(26)	258	1,452
Decrease (increase) in other assets	31,147	(41,803)	21,773
(Decrease) increase in accounts payable and accrued expenses	(6,061)	(1,667)	17,797
(Decrease) increase in accrued interest payable	(24,275)	(4,319)	11,231
(Decrease) increase in other liabilities	(26,422)	12,269	8,437
(Decrease) increase in security deposits	(14,958)	1,949	4,041
Net cash provided by operating activities	1,111,489	1,356,499	1,324,073
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(205,880)	(331,336)	(469,989)
Investment in real estate – development/other	(566,825)	(653,897)	(530,387)
Capital expenditures to real estate	(172,177)	(182,113)	(185,957)
Non-real estate capital additions	(5,731)	(3,991)	(5,286)
Interest capitalized for real estate and unconsolidated entities under development	(51,451)	(59,885)	(52,782)
Proceeds from disposition of real estate, net	6,824,659	504,748	522,647
Investments in unconsolidated entities	(5,266)	(23,019)	(15,768)
Distributions from unconsolidated entities – return of capital	13,798	51,144	103,793
Proceeds from sale of investment securities and other investments	72,815	2,535	57
(Increase) decrease in deposits on real estate acquisitions and investments, net	(32,503)	17,874	33,004
Decrease (increase) in mortgage deposits	534	(531)	798
Consolidation of previously unconsolidated properties	0	0	(44,796)
Net cash provided by (used for) investing activities	5,871,973	(678,471)	(644,666)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(13,305)	(6,425)	(10,982)
Mortgage deposits	(8,497)	(8,588)	(7,699)
Mortgage notes payable:
Lump sum payoffs	(583,122)	(359,244)	(88,788)
Scheduled principal repayments	(8,544)	(9,275)	(11,869)
Notes, net:
Proceeds	496,705	746,391	1,194,277
Lump sum payoffs	(1,500,000)	(300,000)	(1,250,000)
Line of credit and commercial paper:
Line of credit proceeds	426,000	3,770,000	7,167,000
Line of credit repayments	(426,000)	(4,103,000)	(6,949,000)
Commercial paper proceeds	1,759,586	3,931,227	0
Commercial paper repayments	(2,127,472)	(3,545,028)	0
(Payments on) settlement of derivative instruments	(4,662)	(13,938)	(758)
Proceeds from Employee Share Purchase Plan (ESPP)	3,686	4,404	3,392
Proceeds from exercise of options	35,833	59,508	82,573
Common Shares repurchased and retired	0	0	(1,777)
Redemption of Preferred Shares	0	(12,720)	0
Premium on redemption of Preferred Shares	0	(3,486)	0
Payment of offering costs	(314)	(79)	(41)
Other financing activities, net	(49)	(49)	(49)
Acquisition of Noncontrolling Interests – Partially Owned Properties	0	0	(5,501)
Contributions – Noncontrolling Interests – Partially Owned Properties	0	0	5,684
Contributions – Noncontrolling Interests – Operating Partnership	1	3	3
Distributions:
Common Shares	(4,771,725)	(784,748)	(776,659)
Preferred Shares	(2,318)	(3,357)	(4,145)
Noncontrolling Interests – Operating Partnership	(188,115)	(30,869)	(30,744)
Noncontrolling Interests – Partially Owned Properties	(36,219)	(6,559)	(7,778)
Net cash (used for) financing activities	(6,948,531)	(675,832)	(692,861)
Net increase (decrease) in cash and cash equivalents	34,931	2,196	(13,454)
Cash and cash equivalents, beginning of year	42,276	40,080	53,534
Cash and cash equivalents, end of year	77,207	42,276	40,080
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	482,152	436,748	443,125
Net cash paid for income and other taxes	1,494	1,264	1,517
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	43,400	0	28,910
Amortization of deferred financing costs:
Other assets	3,366	3,054	3,054
Mortgage notes payable, net	3,978	3,589	3,075
Notes, net	5,289	4,158	4,959
Amortization of discounts and premiums on debt:
Mortgage notes payable	(21,158)	(13,126)	(15,904)
Notes, net	3,172	2,557	2,384
Line of credit and commercial paper	608	1,077	0
Amortization of deferred settlements on derivative instruments:
Other liabilities	(78)	(169)	(534)
Accumulated other comprehensive income	41,758	18,244	16,868
Write-off of pursuit costs [Abstract]
Investment in real estate, net	3,586	2,804	2,541
Deposits – restricted	0	330	0
Other assets	402	74	1,066
Accounts payable and accrued expenses	104	0	0
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	(6,327)	(17,340)	4,610
Other liabilities	1,526	2,315	3,342
Distributions from unconsolidated entities return on capital:
Investments in unconsolidated entities	2,863	4,606	5,360
Other liabilities	0	135	210
Realized/unrealized loss (gain) on derivative instruments:
Other assets	1,798	(3,573)	10,160
Notes, net	(1,798)	2,058	1,597
Other liabilities	3,989	2,351	21,489
Accumulated other comprehensive income	(3,915)	2,219	(33,306)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(51,451)	(59,885)	(52,717)
Investments in unconsolidated entities	0	0	(65)
Investments in unconsolidated entities:
Investments in unconsolidated entities	(2,326)	(1,404)	(6,318)
Other liabilities	(2,940)	(21,615)	(9,450)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	14,014	51,144	103,793
Other assets	(216)	0	0
Consolidation of previously unconsolidated properties:
Investment in real estate, net	205,880	331,336	469,989
Investments in unconsolidated entities	(5,266)	(23,019)	(15,768)
Accounts payable and accrued expenses	(6,061)	(1,667)	17,797
Debt financing costs:
Other assets	(8,553)	0	0
Mortgage notes payable, net	(507)	(35)	(448)
Notes, net	(4,245)	(6,390)	(10,534)
(Payments on) settlement of derivative instruments:
Other assets	0	1,848	6,623
Other liabilities	(4,662)	(15,786)	(7,381)
Other:
Foreign currency translation adjustments	(264)	327	552
Partially Owned Properties – Unconsolidated
Changes in assets and liabilities:
(Decrease) increase in accounts payable and accrued expenses	0	0	1,987
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	0	0	64,319
Investments in unconsolidated entities	0	0	(847)
Consolidation of previously unconsolidated properties:
Investment in real estate, net	0	0	(64,319)
Investments in unconsolidated entities	0	0	(847)
Accounts payable and accrued expenses	0	0	1,987
Other Liabilities	$ 0	$ 0	$ 18,383

CONSOLIDATED STATEMENTS OF CA10

CONSOLIDATED STATEMENTS OF CASH FLOWS OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 4,480,104	$ 908,018	$ 658,683
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	705,649	765,895	758,861
Amortization of deferred financing costs	12,633	10,801	11,088
Amortization of above/below market leases	3,426	3,382	3,222
Amortization of discounts and premiums on debt	(17,378)	(9,492)	(13,520)
Amortization of deferred settlements on derivative instruments	41,680	18,075	16,334
Write-off of pursuit costs	4,092	3,208	3,607
(Income) loss from investments in unconsolidated entities	(4,801)	(15,025)	7,952
Distributions from unconsolidated entities – return on capital	2,863	4,741	5,570
Net (gain) on sales of investment securities and other investments	(58,409)	(526)	(57)
Net (gain) on sales of real estate properties	(4,044,055)	(335,134)	(212,685)
Net (gain) loss on sales of land parcels	(15,731)	1	(5,277)
Net (gain) on sales of discontinued operations	(43)	0	(179)
Realized/unrealized loss (gain) on derivative instruments	74	3,055	(60)
Compensation paid with Company Common Shares	30,530	34,607	27,543
Changes in assets and liabilities:
Decrease (increase) in deposits – restricted	11,450	(1,794)	(1,740)
(Increase) decrease in mortgage deposits	(26)	258	1,452
Decrease (increase) in other assets	31,147	(41,803)	21,773
(Decrease) increase in accounts payable and accrued expenses	(6,061)	(1,667)	17,797
(Decrease) increase in accrued interest payable	(24,275)	(4,319)	11,231
(Decrease) increase in other liabilities	(26,422)	12,269	8,437
Increase (decrease) in security deposits	(14,958)	1,949	4,041
Net cash provided by operating activities	1,111,489	1,356,499	1,324,073
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(205,880)	(331,336)	(469,989)
Investment in real estate – development/other	(566,825)	(653,897)	(530,387)
Capital expenditures to real estate	(172,177)	(182,113)	(185,957)
Non-real estate capital additions	(5,731)	(3,991)	(5,286)
Interest capitalized for real estate and unconsolidated entities under development	(51,451)	(59,885)	(52,782)
Proceeds from disposition of real estate, net	6,824,659	504,748	522,647
Investments in unconsolidated entities	(5,266)	(23,019)	(15,768)
Distributions from unconsolidated entities – return of capital	13,798	51,144	103,793
Proceeds from sale of investment securities	72,815	2,535	57
(Increase) decrease in deposits on real estate acquisitions and investments, net	(32,503)	17,874	33,004
Decrease (increase) in mortgage deposits	534	(531)	798
Consolidation of previously unconsolidated properties	0	0	(44,796)
Net cash provided by (used for) investing activities	5,871,973	(678,471)	(644,666)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(13,305)	(6,425)	(10,982)
Mortgage deposits	(8,497)	(8,588)	(7,699)
Mortgage notes payable:
Lump sum payoffs	(583,122)	(359,244)	(88,788)
Scheduled principal repayments	(8,544)	(9,275)	(11,869)
Notes, net:
Proceeds	496,705	746,391	1,194,277
Lump sum payoffs	(1,500,000)	(300,000)	(1,250,000)
Line of credit and commercial paper:
Line of credit proceeds	426,000	3,770,000	7,167,000
Line of credit repayments	(426,000)	(4,103,000)	(6,949,000)
Commercial paper proceeds	1,759,586	3,931,227	0
Commercial paper repayments	(2,127,472)	(3,545,028)	0
(Payments on) settlement of derivative instruments	(4,662)	(13,938)	(758)
Proceeds from EQR's Employee Share Purchase Plan (ESPP)	3,686	4,404	3,392
Proceeds from exercise of EQR options	35,833	59,508	82,573
OP units repurchased and retired	0	0	(1,777)
Redemption of Preference Units	0	12,720	0
Premium on redemption of Preference Units	0	3,486	0
Payment of offering costs	(314)	(79)	(41)
Other financing activities, net	(49)	(49)	(49)
Acquisition of Noncontrolling Interests – Partially Owned Properties	0	0	(5,501)
Contributions – Noncontrolling Interests – Partially Owned Properties	0	0	5,684
Contributions - Limited Partners	1	3	3
Distributions:
OP Units – General Partner	(4,771,725)	(784,748)	(776,659)
Preference Units	(2,318)	(3,357)	(4,145)
OP Units – Limited Partners	(188,115)	(30,869)	(30,744)
Noncontrolling Interests – Partially Owned Properties	(36,219)	(6,559)	(7,778)
Net cash (used for) financing activities	(6,948,531)	(675,832)	(692,861)
Net increase (decrease) in cash and cash equivalents	34,931	2,196	(13,454)
Cash and cash equivalents, beginning of year	42,276	40,080	53,534
Cash and cash equivalents, end of year	77,207	42,276	40,080
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	482,152	436,748	443,125
Net cash paid for income and other taxes	1,494	1,264	1,517
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	43,400	0	28,910
Amortization of deferred financing costs:
Other assets	3,366	3,054	3,054
Mortgage notes payable, net	3,978	3,589	3,075
Notes, net	5,289	4,158	4,959
Amortization of discounts and premiums on debt:
Mortgage notes payable	(21,158)	(13,126)	(15,904)
Notes, net	3,172	2,557	2,384
Line of credit and commercial paper	608	1,077	0
Amortization of deferred settlements on derivative instruments:
Other liabilities	(78)	(169)	(534)
Accumulated other comprehensive income	41,758	18,244	16,868
Write-off of pursuit costs [Abstract]
Investment in real estate, net	3,586	2,804	2,541
Deposits – restricted	0	330	0
Other assets	402	74	1,066
Accounts payable and accrued expenses	104	0	0
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	(6,327)	(17,340)	4,610
Other liabilities	1,526	2,315	3,342
Distributions from unconsolidated entities return on capital:
Investments in unconsolidated entities	2,863	4,606	5,360
Other liabilities	0	135	210
Realized/unrealized loss (gain) on derivative instruments:
Other assets	1,798	(3,573)	10,160
Notes, net	(1,798)	2,058	1,597
Other liabilities	3,989	2,351	21,489
Accumulated other comprehensive income	(3,915)	2,219	(33,306)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(51,451)	(59,885)	(52,717)
Investments in unconsolidated entities	0	0	(65)
Investments in unconsolidated entities:
Investments in unconsolidated entities	(2,326)	(1,404)	(6,318)
Other liabilities	(2,940)	(21,615)	(9,450)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	14,014	51,144	103,793
Other assets	(216)	0	0
Consolidation of previously unconsolidated properties:
Investment in real estate, net	205,880	331,336	469,989
Investments in unconsolidated entities	(5,266)	(23,019)	(15,768)
Accounts payable and accrued expenses	(6,061)	(1,667)	17,797
Debt financing costs:
Other assets	(8,553)	0	0
Mortgage notes payable, net	(507)	(35)	(448)
Notes, net	(4,245)	(6,390)	(10,534)
(Payments on) settlement of derivative instruments:
Other assets	0	1,848	6,623
Other liabilities	(4,662)	(15,786)	(7,381)
Other:
Foreign currency translation adjustments	(264)	327	552
Partially Owned Properties – Unconsolidated
Changes in assets and liabilities:
(Decrease) increase in accounts payable and accrued expenses	0	0	1,987
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	0	0	64,319
Investments in unconsolidated entities	0	0	(847)
Consolidation of previously unconsolidated properties:
Investment in real estate, net	0	0	(64,319)
Investments in unconsolidated entities	0	0	(847)
Accounts payable and accrued expenses	0	0	1,987
Other Liabilities	0	0	18,383
ERPOP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	4,480,104	908,018	658,683
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	705,649	765,895	758,861
Amortization of deferred financing costs	12,633	10,801	11,088
Amortization of above/below market leases	3,426	3,382	3,222
Amortization of discounts and premiums on debt	(17,378)	(9,492)	(13,520)
Amortization of deferred settlements on derivative instruments	41,680	18,075	16,334
Write-off of pursuit costs	4,092	3,208	3,607
(Income) loss from investments in unconsolidated entities	(4,801)	(15,025)	7,952
Distributions from unconsolidated entities – return on capital	2,863	4,741	5,570
Net (gain) on sales of investment securities and other investments	(58,409)	(526)	(57)
Net (gain) on sales of real estate properties	(4,044,055)	(335,134)	(212,685)
Net (gain) loss on sales of land parcels	(15,731)	1	(5,277)
Net (gain) on sales of discontinued operations	(43)	0	(179)
Realized/unrealized loss (gain) on derivative instruments	74	3,055	(60)
Compensation paid with Company Common Shares	30,530	34,607	27,543
Changes in assets and liabilities:
Decrease (increase) in deposits – restricted	11,450	(1,794)	(1,740)
(Increase) decrease in mortgage deposits	(26)	258	1,452
Decrease (increase) in other assets	31,147	(41,803)	21,773
(Decrease) increase in accounts payable and accrued expenses	(6,061)	(1,667)	17,797
(Decrease) increase in accrued interest payable	(24,275)	(4,319)	11,231
(Decrease) increase in other liabilities	(26,422)	12,269	8,437
Increase (decrease) in security deposits	(14,958)	1,949	4,041
Net cash provided by operating activities	1,111,489	1,356,499	1,324,073
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	(205,880)	(331,336)	(469,989)
Investment in real estate – development/other	(566,825)	(653,897)	(530,387)
Capital expenditures to real estate	(172,177)	(182,113)	(185,957)
Non-real estate capital additions	(5,731)	(3,991)	(5,286)
Interest capitalized for real estate and unconsolidated entities under development	(51,451)	(59,885)	(52,782)
Proceeds from disposition of real estate, net	6,824,659	504,748	522,647
Investments in unconsolidated entities	(5,266)	(23,019)	(15,768)
Distributions from unconsolidated entities – return of capital	13,798	51,144	103,793
Proceeds from sale of investment securities	72,815	2,535	57
(Increase) decrease in deposits on real estate acquisitions and investments, net	(32,503)	17,874	33,004
Decrease (increase) in mortgage deposits	534	(531)	798
Consolidation of previously unconsolidated properties	0	0	(44,796)
Net cash provided by (used for) investing activities	5,871,973	(678,471)	(644,666)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt financing costs	(13,305)	(6,425)	(10,982)
Mortgage deposits	(8,497)	(8,588)	(7,699)
Mortgage notes payable:
Lump sum payoffs	(583,122)	(359,244)	(88,788)
Scheduled principal repayments	(8,544)	(9,275)	(11,869)
Notes, net:
Proceeds	496,705	746,391	1,194,277
Lump sum payoffs	(1,500,000)	(300,000)	(1,250,000)
Line of credit and commercial paper:
Line of credit proceeds	426,000	3,770,000	7,167,000
Line of credit repayments	(426,000)	(4,103,000)	(6,949,000)
Commercial paper proceeds	1,759,586	3,931,227	0
Commercial paper repayments	(2,127,472)	(3,545,028)	0
(Payments on) settlement of derivative instruments	(4,662)	(13,938)	(758)
Proceeds from EQR's Employee Share Purchase Plan (ESPP)	3,686	4,404	3,392
Proceeds from exercise of EQR options	35,833	59,508	82,573
OP units repurchased and retired	0	0	(1,777)
Redemption of Preference Units	0	12,720	0
Premium on redemption of Preference Units	0	3,486	0
Payment of offering costs	(314)	(79)	(41)
Other financing activities, net	(49)	(49)	(49)
Acquisition of Noncontrolling Interests – Partially Owned Properties	0	0	(5,501)
Contributions – Noncontrolling Interests – Partially Owned Properties	0	0	5,684
Contributions - Limited Partners	1	3	3
Distributions:
OP Units – General Partner	(4,771,725)	(784,748)	(776,659)
Preference Units	(2,318)	(3,357)	(4,145)
OP Units – Limited Partners	(188,115)	(30,869)	(30,744)
Noncontrolling Interests – Partially Owned Properties	(36,219)	(6,559)	(7,778)
Net cash (used for) financing activities	(6,948,531)	(675,832)	(692,861)
Net increase (decrease) in cash and cash equivalents	34,931	2,196	(13,454)
Cash and cash equivalents, beginning of year	42,276	40,080	53,534
Cash and cash equivalents, end of year	77,207	42,276	40,080
SUPPLEMENTAL INFORMATION:
Cash paid for interest, net of amounts capitalized	482,152	436,748	443,125
Net cash paid for income and other taxes	1,494	1,264	1,517
Real estate acquisitions/dispositions/other:
Mortgage loans assumed	43,400	0	28,910
Amortization of deferred financing costs:
Other assets	3,366	3,054	3,054
Mortgage notes payable, net	3,978	3,589	3,075
Notes, net	5,289	4,158	4,959
Amortization of discounts and premiums on debt:
Mortgage notes payable	(21,158)	(13,126)	(15,904)
Notes, net	3,172	2,557	2,384
Line of credit and commercial paper	608	1,077	0
Amortization of deferred settlements on derivative instruments:
Other liabilities	(78)	(169)	(534)
Accumulated other comprehensive income	41,758	18,244	16,868
Write-off of pursuit costs [Abstract]
Investment in real estate, net	3,586	2,804	2,541
Deposits – restricted	0	330	0
Other assets	402	74	1,066
Accounts payable and accrued expenses	104	0	0
(Income) loss from investments in unconsolidated entities:
Investments in unconsolidated entities	(6,327)	(17,340)	4,610
Other liabilities	1,526	2,315	3,342
Distributions from unconsolidated entities return on capital:
Investments in unconsolidated entities	2,863	4,606	5,360
Other liabilities	0	135	210
Realized/unrealized loss (gain) on derivative instruments:
Other assets	1,798	(3,573)	10,160
Notes, net	(1,798)	2,058	1,597
Other liabilities	3,989	2,351	21,489
Accumulated other comprehensive income	(3,915)	2,219	(33,306)
Interest capitalized for real estate and unconsolidated entities under development:
Investment in real estate, net	(51,451)	(59,885)	(52,717)
Investments in unconsolidated entities	0	0	(65)
Investments in unconsolidated entities:
Investments in unconsolidated entities	(2,326)	(1,404)	(6,318)
Other liabilities	(2,940)	(21,615)	(9,450)
Distributions from unconsolidated entities - return of capital:
Investments in unconsolidated entities	14,014	51,144	103,793
Other assets	(216)	0	0
Consolidation of previously unconsolidated properties:
Investment in real estate, net	205,880	331,336	469,989
Investments in unconsolidated entities	(5,266)	(23,019)	(15,768)
Accounts payable and accrued expenses	(6,061)	(1,667)	17,797
Debt financing costs:
Other assets	(8,553)	0	0
Mortgage notes payable, net	(507)	(35)	(448)
Notes, net	(4,245)	(6,390)	(10,534)
(Payments on) settlement of derivative instruments:
Other assets	0	1,848	6,623
Other liabilities	(4,662)	(15,786)	(7,381)
Other:
Foreign currency translation adjustments	(264)	327	552
ERPOP [Member] | Partially Owned Properties – Unconsolidated
Changes in assets and liabilities:
(Decrease) increase in accounts payable and accrued expenses	0	0	1,987
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in real estate – acquisitions	0	0	64,319
Investments in unconsolidated entities	0	0	(847)
Consolidation of previously unconsolidated properties:
Investment in real estate, net	0	0	(64,319)
Investments in unconsolidated entities	0	0	(847)
Accounts payable and accrued expenses	0	0	1,987
Other Liabilities	$ 0	$ 0	$ 18,383

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Series K Preferred Stock [Member]	PREFERRED SHARES	COMMON SHARES, $0.01 PAR VALUE	PAID IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE (LOSS)	OPERATING PARTNERSHIP	Partially Owned [Domain]
Balance, beginning of year at Dec. 31, 2013			$ 50,000	$ 3,605	$ 8,561,500	$ 2,047,258	$ (155,162)
Balance, beginning of year at Dec. 31, 2013								$ 211,412	$ 126,583
PREFERRED SHARES
Partial redemption of 8.29% Series K Cumulative Redeemable			0
Preferred Stock Preference Units Dividend Rate Percentage		8.29%
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				1	2,364			(2,365)
Exercise of share options				21	82,552
Employee Share Purchase Plan (ESPP)				0	3,392
Restricted shares				2	9,902
PAID IN CAPITAL
Conversion of OP Units into Common Shares				1	2,364			(2,365)
Exercise of share options				21	82,552
Employee Share Purchase Plan (ESPP)				0	3,392
Conversion of restricted shares to restricted units					0			0
Share-based employee compensation expense:
Restricted shares				2	9,902
Share options					7,349
ESPP discount					859
Common Shares repurchsed and retired					(1,777)
Offering costs					(41)
Supplemental Executive Retirement Plan (SERP)					7,374
Acquisition of Noncontrolling Interests – Partially Owned Properties					(2,308)				(2,244)
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership	$ 139,818				(139,818)
Adjustment for Noncontrolling Interests ownership in Operating Partnership					4,992			(4,992)
RETAINED EARNINGS
Net income attributable to controlling interests	631,308					631,308
Common Share distributions						(723,782)
Preferred Share distributions						(4,145)
Premium on redemption of Preferred Shares – cash charge						0
Accumulated other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	(33,306)						(33,306)
Losses reclassified into earnings from other comprehensive income	(16,868)						16,868
Accumulated other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	(552)						(552)
OPERATING PARTNERSHIP
Issuance of restricted units to Noncontrolling Interests								3
Conversion of OP Units into Common Shares				1	2,364			(2,365)
Conversion of restricted shares to restricted units					0			0
Equity compensation associated with Noncontrolling Interests								11,969
Net income attributable to Noncontrolling Interests	658,683							24,831	2,544
Distributions to Noncontrolling Interests								(28,676)	(7,827)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership	(2,229)							2,229
Adjustment for Noncontrolling Interests ownership in Operating Partnership					4,992			(4,992)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	658,683							24,831	2,544
Contributions – Noncontrolling Interests – Partially Owned Properties	5,684								5,684
Distributions to Noncontrolling Interests								(28,676)	(7,827)
Acquisition of Noncontrolling Interests – Partially Owned Properties					(2,308)				(2,244)
Deconsolidation of previously consolidated Noncontrolling Interests									0
Other									169
Balance, end of year at Dec. 31, 2014			50,000	3,629	8,536,340	1,950,639	(172,152)
Balance, end of year at Dec. 31, 2014								214,411	124,909
PREFERRED SHARES
Partial redemption of 8.29% Series K Cumulative Redeemable			(12,720)
Preferred Stock Preference Units Dividend Rate Percentage		8.29%
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				2	4,964			(4,966)
Exercise of share options				14	59,494
Employee Share Purchase Plan (ESPP)				1	4,403
Restricted shares				2	15,064
PAID IN CAPITAL
Conversion of OP Units into Common Shares				2	4,964			(4,966)
Exercise of share options				14	59,494
Employee Share Purchase Plan (ESPP)				1	4,403
Conversion of restricted shares to restricted units					(70)			70
Share-based employee compensation expense:
Restricted shares				2	15,064
Share options					3,756
ESPP discount					884
Common Shares repurchsed and retired					0
Offering costs					(79)
Supplemental Executive Retirement Plan (SERP)					1,380
Acquisition of Noncontrolling Interests – Partially Owned Properties					0				0
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership	64,378				(64,378)
Adjustment for Noncontrolling Interests ownership in Operating Partnership					10,607			(10,607)
RETAINED EARNINGS
Net income attributable to controlling interests	870,120					870,120
Common Share distributions						(804,825)
Preferred Share distributions						(3,357)
Premium on redemption of Preferred Shares – cash charge						(3,486)
Accumulated other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	2,219						2,219
Losses reclassified into earnings from other comprehensive income	(18,244)						18,244
Accumulated other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	(327)						(327)
OPERATING PARTNERSHIP
Issuance of restricted units to Noncontrolling Interests								3
Conversion of OP Units into Common Shares				2	4,964			(4,966)
Conversion of restricted shares to restricted units					(70)			70
Equity compensation associated with Noncontrolling Interests								21,503
Net income attributable to Noncontrolling Interests	908,018							34,241	3,657
Distributions to Noncontrolling Interests								(31,604)	(6,608)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership	1,672							(1,672)
Adjustment for Noncontrolling Interests ownership in Operating Partnership					10,607			(10,607)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	908,018							34,241	3,657
Contributions – Noncontrolling Interests – Partially Owned Properties	0								0
Distributions to Noncontrolling Interests								(31,604)	(6,608)
Acquisition of Noncontrolling Interests – Partially Owned Properties					0				0
Deconsolidation of previously consolidated Noncontrolling Interests									(117,350)
Other									0
Balance, end of year at Dec. 31, 2015	10,470,368		37,280	3,648	8,572,365	2,009,091	(152,016)
Balance, end of year at Dec. 31, 2015	10,696,355							221,379	4,608
PREFERRED SHARES
Partial redemption of 8.29% Series K Cumulative Redeemable			0
Preferred Stock Preference Units Dividend Rate Percentage		8.29%
COMMON SHARES, $0.01 PAR VALUE
Conversion of OP Units into Common Shares				1	3,725			(3,726)
Exercise of share options				8	35,825
Employee Share Purchase Plan (ESPP)				1	3,685
Restricted shares				1	15,015
PAID IN CAPITAL
Conversion of OP Units into Common Shares				1	3,725			(3,726)
Exercise of share options				8	35,825
Employee Share Purchase Plan (ESPP)				1	3,685
Conversion of restricted shares to restricted units					0			0
Share-based employee compensation expense:
Restricted shares				1	15,015
Share options					3,432
ESPP discount					650
Common Shares repurchsed and retired					0
Offering costs					(314)
Supplemental Executive Retirement Plan (SERP)					748
Acquisition of Noncontrolling Interests – Partially Owned Properties					0				0
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership	(115,093)				115,093
Adjustment for Noncontrolling Interests ownership in Operating Partnership					8,198			(8,198)
RETAINED EARNINGS
Net income attributable to controlling interests	4,292,163					4,292,163
Common Share distributions						(4,754,537)
Preferred Share distributions						(3,091)
Premium on redemption of Preferred Shares – cash charge						0
Accumulated other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	(3,915)						(3,915)
Losses reclassified into earnings from other comprehensive income	(41,758)						41,758
Accumulated other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	264						264
OPERATING PARTNERSHIP
Issuance of restricted units to Noncontrolling Interests								1
Conversion of OP Units into Common Shares				1	3,725			(3,726)
Conversion of restricted shares to restricted units					0			0
Equity compensation associated with Noncontrolling Interests								18,180
Net income attributable to Noncontrolling Interests	4,480,104							171,511	16,430
Distributions to Noncontrolling Interests								(187,448)	(36,268)
Change in carrying value of Redeemable Noncontrolling Interests – Operating Partnership	(9,598)							9,598
Adjustment for Noncontrolling Interests ownership in Operating Partnership					8,198			(8,198)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	4,480,104							171,511	16,430
Contributions – Noncontrolling Interests – Partially Owned Properties	0								0
Distributions to Noncontrolling Interests								(187,448)	(36,268)
Acquisition of Noncontrolling Interests – Partially Owned Properties					0				0
Deconsolidation of previously consolidated Noncontrolling Interests									0
Other									25,839
Balance, end of year at Dec. 31, 2016	10,229,078		$ 37,280	$ 3,659	$ 8,758,422	$ 1,543,626	$ (113,909)
Balance, end of year at Dec. 31, 2016	$ 10,460,984							$ 221,297	$ 10,609

CONSOLIDATED STATEMENT OF CHA12

CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP - USD ($) $ in Thousands	Total	Series K Preferred Stock [Member]	ERPOP [Member]	ERPOP [Member]Series K Preferred Stock [Member]	PREFERRED SHARESERPOP [Member]	PREFERRED SHARESERPOP [Member]Series K Preferred Stock [Member]	General Partner [Member]ERPOP [Member]	Limited Partner [Member]ERPOP [Member]	ACCUMULATED OTHER COMPREHENSIVE (LOSS)ERPOP [Member]	PARTIALLY OWNED PROPERTIESERPOP [Member]
Balance, beginning of year at Dec. 31, 2013					$ 50,000		$ 10,612,363	$ 211,412	$ (155,162)
Balance, beginning of year at Dec. 31, 2013										$ 126,583
Preference Units
Partial redemption of 8.29% Series K Cumulative Redeemable					0
Preferred Stock Preference Units Dividend Rate Percentage		8.29%				8.29%
OP Unit Issuance:
Conversion of OP Units held by Limited Partners into OP Units held by General Partner							2,365	(2,365)
Exercise of EQR share options							82,573
EQR's Employee Share Purchase Plan (ESPP)							3,392
Conversion of EQR restricted shares to restricted units							0	0
Share-based employee compensation expense:
EQR restricted shares							9,904
EQR share options							7,349
EQR ESPP discount							859
OP Units repurchased and retired							(1,777)
Net income available to Units – General Partner			$ 627,163				627,163
OP Units – General Partner distributions							(723,782)
Offering costs							(41)
Supplemental Executive Retirement Plan (SERP)							7,374
Acquisition of Noncontrolling Interests – Partially Owned Properties							(2,308)			(2,244)
Change in market value of Redeemable Limited Partners							(139,818)
Adjustment for Limited Partners ownership in Operating Partnership							4,992
LIMITED PARTNERS
Issuance of restricted units to Limited Partners								3
Conversion of OP Units held by Limited Partners into OP Units held by General Partner							2,365	(2,365)
Conversion of EQR restricted shares to restricted units							0	0
Equity compensation associated with Units – Limited Partners								11,969
Net income available to Units – Limited Partners			24,831					24,831
Units – Limited Partners distributions								(28,676)
Change in carrying value of Redeemable Limited Partners								2,229
Noncontrolling Interest, Period Increase (Decrease)								(4,992)
Accumulated other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	$ (33,306)		(33,306)						(33,306)
Losses reclassified into earnings from other comprehensive income	(16,868)		(16,868)						16,868
Accumulated other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	(552)		(552)						(552)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	658,683		658,683							2,544
Contributions by Noncontrolling Interests	5,684		5,684							5,684
Distributions to Noncontrolling Interests										(7,827)
Acquisition of Noncontrolling Interests – Partially Owned Properties							(2,308)			(2,244)
Deconsolidation of previously consolidated Noncontrolling Interests										0
Other										169
Balance, end of year at Dec. 31, 2014					50,000		10,490,608	214,411	(172,152)
Balance, end of year at Dec. 31, 2014										124,909
Preference Units
Partial redemption of 8.29% Series K Cumulative Redeemable					(12,720)
Preferred Stock Preference Units Dividend Rate Percentage		8.29%		8.29%		0.00%
OP Unit Issuance:
Conversion of OP Units held by Limited Partners into OP Units held by General Partner							4,966	(4,966)
Exercise of EQR share options							59,508
EQR's Employee Share Purchase Plan (ESPP)							4,404
Conversion of EQR restricted shares to restricted units							(70)	70
Share-based employee compensation expense:
EQR restricted shares							15,066
EQR share options							3,756
EQR ESPP discount							884
OP Units repurchased and retired							0
Net income available to Units – General Partner			863,277				863,277
OP Units – General Partner distributions							(804,825)
Offering costs							(79)
Supplemental Executive Retirement Plan (SERP)							1,380
Acquisition of Noncontrolling Interests – Partially Owned Properties							0			0
Change in market value of Redeemable Limited Partners							(64,378)
Adjustment for Limited Partners ownership in Operating Partnership							10,607
LIMITED PARTNERS
Issuance of restricted units to Limited Partners								3
Conversion of OP Units held by Limited Partners into OP Units held by General Partner							4,966	(4,966)
Conversion of EQR restricted shares to restricted units							(70)	70
Equity compensation associated with Units – Limited Partners								21,503
Net income available to Units – Limited Partners			34,241					34,241
Units – Limited Partners distributions								(31,604)
Change in carrying value of Redeemable Limited Partners								(1,672)
Noncontrolling Interest, Period Increase (Decrease)								(10,607)
Accumulated other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	2,219		2,219						2,219
Losses reclassified into earnings from other comprehensive income	(18,244)		(18,244)						18,244
Accumulated other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	(327)		(327)						(327)
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	908,018		908,018							3,657
Contributions by Noncontrolling Interests	0		0							0
Distributions to Noncontrolling Interests										(6,608)
Acquisition of Noncontrolling Interests – Partially Owned Properties							0			0
Deconsolidation of previously consolidated Noncontrolling Interests										(117,350)
Other										0
Balance, end of year at Dec. 31, 2015					37,280		10,585,104	221,379	(152,016)
Balance, end of year at Dec. 31, 2015										4,608
Preference Units
Partial redemption of 8.29% Series K Cumulative Redeemable					0
Preferred Stock Preference Units Dividend Rate Percentage		8.29%		8.29%		8.29%
OP Unit Issuance:
Conversion of OP Units held by Limited Partners into OP Units held by General Partner							3,726	(3,726)
Exercise of EQR share options							35,833
EQR's Employee Share Purchase Plan (ESPP)							3,686
Conversion of EQR restricted shares to restricted units							0	0
Share-based employee compensation expense:
EQR restricted shares							15,016
EQR share options							3,432
EQR ESPP discount							650
OP Units repurchased and retired							0
Net income available to Units – General Partner			4,289,072				4,289,072
OP Units – General Partner distributions							(4,754,537)
Offering costs							(314)
Supplemental Executive Retirement Plan (SERP)							748
Acquisition of Noncontrolling Interests – Partially Owned Properties							0			0
Change in market value of Redeemable Limited Partners							115,093
Adjustment for Limited Partners ownership in Operating Partnership							8,198
LIMITED PARTNERS
Issuance of restricted units to Limited Partners								1
Conversion of OP Units held by Limited Partners into OP Units held by General Partner							3,726	(3,726)
Conversion of EQR restricted shares to restricted units							0	0
Equity compensation associated with Units – Limited Partners								18,180
Net income available to Units – Limited Partners			171,511					171,511
Units – Limited Partners distributions								(187,448)
Change in carrying value of Redeemable Limited Partners								9,598
Noncontrolling Interest, Period Increase (Decrease)								(8,198)
Accumulated other comprehensive income (loss) – derivative instruments:
Unrealized holding (losses) gains arising during the year	(3,915)		(3,915)						(3,915)
Losses reclassified into earnings from other comprehensive income	(41,758)		(41,758)						41,758
Accumulated other comprehensive income (loss) – foreign currency:
Currency translation adjustments arising during the year	264		264						264
PARTIALLY OWNED PROPERTIES
Net income attributable to Noncontrolling Interests	4,480,104		4,480,104							16,430
Contributions by Noncontrolling Interests	$ 0		$ 0							0
Distributions to Noncontrolling Interests										(36,268)
Acquisition of Noncontrolling Interests – Partially Owned Properties							0			0
Deconsolidation of previously consolidated Noncontrolling Interests										0
Other										25,839
Balance, end of year at Dec. 31, 2016					$ 37,280		$ 10,305,707	$ 221,297	$ (113,909)
Balance, end of year at Dec. 31, 2016										$ 10,609

Business

Business	12 Months Ended
	Dec. 31, 2016
Business [Abstract]
Business	1. Business Equity Residential (“EQR”), a Maryland real estate investment trust (“REIT”) formed in March 1993, is an S&P 500 company focused on the acquisition, development and management of rental apartment properties in urban and high-density suburban coastal gateway markets. ERP Operating Limited Partnership ("ERPOP"), an Illinois limited partnership, was formed in May 1993 to conduct the multifamily residential property business of Equity Residential. EQR has elected to be taxed as a REIT. 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, 2016 owned an approximate 96.2% 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 public 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, 2016 , the Company, directly or indirectly through investments in title holding entities, owned all or a portion of 302 properties located in 10 states and the District of Columbia consisting of 77,458 apartment units. The ownership breakdown includes (table does not include various uncompleted development properties): Properties Apartment Units Wholly Owned Properties 280 72,445 Master-Leased Properties – Consolidated 3 853 Partially Owned Properties – Consolidated 17 3,215 Partially Owned Properties – Unconsolidated 2 945 302 77,458 The “Wholly Owned Properties” are accounted for under the consolidation method of accounting. The "Master-Leased Properties – Consolidated" are wholly owned by the Company but the entire project is leased to a third party corporate housing provider. These properties are consolidated and reflected as real estate assets while the master leases are accounted for as operating leases. The “Partially Owned Properties – Consolidated” are controlled by the Company, but have partners with noncontrolling interests and are accounted for under the consolidation method of accounting and qualify as variable interest entities. The “Partially Owned Properties – Unconsolidated” are controlled by the Company's partners but the Company has noncontrolling interests and are accounted for under the equity method of accounting. The Company maintains long-term ground leases for 13 operating properties. The Company owns the building and improvements and leases the land underlying the improvements under long-term ground leases. The expiration dates for these leases range from 2042 through 2110 . These properties are consolidated and reflected as real estate assets while the ground leases are accounted for as operating leases.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
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 two unconsolidated operating properties. Real Estate Assets and Depreciation of Investment in Real Estate An acquiring entity is required to recognize all assets acquired and liabilities assumed in a transaction at the acquisition-date fair value with limited exceptions. In addition, an acquiring entity is required to expense acquisition-related costs as incurred, value noncontrolling interests at fair value at the acquisition date and expense restructuring costs associated with an acquired business. The Company allocates the purchase price of properties to net tangible and identified intangible assets acquired based on their fair values. In making estimates of 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 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 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 fair value (as necessary) if acquired separately or market research/comparables if acquired with an operating property. • Furniture, Fixtures and Equipment – Ranges between $10,000 and $25,000 per apartment unit acquired as an estimate of the 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 building 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 retail leases' term at acquisition approximates the average remaining term of all acquired retail leases. See Note 4 for more information on above and below market 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 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. • Site Improvements – Based on replacement cost, which approximates fair value. Depreciation is calculated on the straight-line method over an estimated useful life of eight years. • Long-Term Debt – The Company calculates the 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 sales or dispositions are recorded when title 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 (see below and Note 4 for further discussion). 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 The Company periodically evaluates its long-lived assets, including its investments 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 and legal and environmental concerns, as well as the Company’s ability to hold and its intent with regard to each asset. Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted. If impairment indicators exist, the Company performs the following: ▪ For long-lived 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 record an impairment loss for the difference between the estimated fair value and the carrying amount of the asset. ▪ 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. Cost Capitalization See the Real Estate Assets and Depreciation of Investment in Real Estate section for a discussion of the Company’s policy with respect to capitalization vs. expensing of fixed asset/repair and maintenance costs. In addition, the Company capitalizes an allocation of the payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of major capital and/or renovation projects. These costs are reflected on the balance sheets as increases to depreciable property. For all development projects, the Company uses its professional judgment in determining whether such costs meet the criteria for capitalization or must be expensed as incurred. The Company capitalizes interest, real estate taxes and insurance and payroll and associated costs for those individuals directly responsible for and who spend their time on development activities, with capitalization ceasing no later than 90 days following issuance of the certificate of occupancy. These costs are reflected on the balance sheets as construction-in-progress for each specific property. The Company expenses as incurred all payroll costs of on-site employees working directly at our properties, except as noted above on our development properties prior to certificate of occupancy issuance and on specific major renovations at selected properties when additional incremental employees are hired. During the years ended December 31, 2016 , 2015 and 2014 , the Company capitalized $18.7 million , $22.3 million and $22.4 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 and repurchase agreements purchased 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 Depository 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. Investment Securities Investment securities are included in other assets in the consolidated balance sheets. These securities are classified as held-to-maturity and carried at amortized cost if management has the positive intent and ability to hold the securities to maturity. Otherwise, the securities are classified as available-for-sale and carried at estimated fair value with unrealized gains and losses included in accumulated other comprehensive (loss), a separate component of shareholders’ equity/partners' capital. As of December 31, 2016 and 2015 , the Company did not hold any investment securities. Fair Value of Financial Instruments, Including Derivative 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, including its derivative 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 seeks 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 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 from the use of derivatives it currently has in place. 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. Revenue Recognition Rental income attributable to residential leases is recorded on a straight-line basis, 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 retail/commercial leases is also recorded on a straight-line basis. Retail/commercial 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. Share-Based Compensation The Company expenses share-based compensation such as 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. The fair value of the option grants are recognized over the requisite service/vesting period of the options. The fair value for the Company's share options was estimated at the time the share options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions: 2016 2015 2014 Expected volatility (1) 26.3% 26.6% 27.0% Expected life (2) 5 years 5 years 5 years Expected dividend yield (3) 3.04% 3.13% 3.78% Risk-free interest rate (4) 1.27% 1.29% 1.50% Option valuation per share $13.02 $13.68 $9.12 (1) Expected volatility – Estimated based on the historical ten-year volatility of EQR’s share price measured on a monthly basis. (2) Expected life – Approximates the actual weighted average life of all share 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 prior to the grant date for a period matching the expected life of each grant. 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 share 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. Income and Other Taxes Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate 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. Deferred tax assets and liabilities applicable to the TRS are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled. The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted. The Company’s deferred tax assets are generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities. As of December 31, 2016 , the Company has recorded a deferred tax asset of approximately $38.7 million , which is fully offset by a valuation allowance due to the uncertainty of realization. The company currently anticipates electing REIT status in the third quarter of 2017 for its primary TRS, retroactive to January 1, 2016. The Company provided for income, franchise and excise taxes allocated as follows in the consolidated statements of operations and comprehensive income for the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 2015 2014 Income and other tax expense (benefit) (1) $ 1,613 $ 917 $ 1,394 Discontinued operations, net (2) 12 15 8 Provision for income, franchise and excise taxes (3) $ 1,625 $ 932 $ 1,402 (1) Primarily includes state and local income, excise and franchise taxes. (2) Primarily represents state and local income, excise and franchise taxes on operating properties sold prior to January 1, 2014 and included in discontinued operations. The amounts included in discontinued operations for the years ending December 31, 2016, 2015 and 2014 represent trailing activity for properties sold in 2013 and prior years. None of the properties sold during the years ended December 31, 2016, 2015 and 2014 met the new criteria for reporting discontinued operations. (3) All provisions for income tax amounts are current and none are deferred. The Company’s TRSs have approximately $16.4 million of net operating loss ("NOL") carryforwards available as of January 1, 2017 that will expire between 2030 and 2032 . During the years ended December 31, 2016 , 2015 and 2014 , the Company’s tax treatment of dividends and distributions were as follows (unaudited): Year Ended December 31, 2016 2015 2014 Tax treatment of dividends and distributions: Ordinary dividends $ 0.722 $ 1.591 $ 1.475 Qualified dividends — 0.037 0.088 Long-term capital gain 9.176 0.443 0.280 Unrecaptured section 1250 gain 3.117 0.139 0.157 Dividends and distributions declared per Common Share/Unit outstanding $ 13.015 $ 2.210 $ 2.000 The unaudited cost of land and depreciable property, net of accumulated depreciation, for federal income tax purposes as of December 31, 2016 and 2015 was approximately $15.8 billion and $17.0 billion , respectively. 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. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the "FASB") issued a comprehensive new revenue recognition standard entitled Revenue from Contracts with Customers that will supersede nearly all existing revenue recognition guidance. The new standard specifically excludes lease revenue. The new standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Companies will likely need to use more judgment and make more estimates than under current revenue recognition guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration, if any, to include in the transaction price and allocating the transaction price to each separate performance obligation. The new standard will be effective for the Company beginning on January 1, 2018 and early adoption will be permitted beginning on January 1, 2017. The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect recognized as of the date of adoption. The Company anticipates selecting the modified retrospective transition method with a cumulative effect recognized as of the date of adoption and will adopt the new standard effective January 1, 2018. The Company is continuing to evaluate the standard; however, we do not expect its adoption to have a significant impact on the consolidated financial statements, as in excess of 90% of total revenues consist of rental income from leasing arrangements, which is specifically excluded from the standard. In addition, the Company's fee and asset management activities are immaterial now that it sold its interest in Joint Base Lewis McChord (see Note 18 for further discussion) and given the nature of its disposition transactions, there should be no changes in accounting under the new standard. In August 2014, the FASB issued a new standard that will explicitly require management to assess an entity's ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. In connection with each annual and interim period, management will assess whether there is substantial doubt about an entity's ability to continue as a going concern within one year after the issuance date. Disclosures will be required if conditions give rise to substantial doubt. However, to determine the specific disclosures, management will need to assess whether its plans will alleviate substantial doubt. The Company adopted this new standard as required effective for the annual period ending after December 31, 2016. The adoption of this standard did not have a material impact on our consolidated results of operations or financial position. In February 2015, the FASB issued new consolidation guidance which makes changes to both the variable interest model and the voting model. Among other changes, the new standard specifically eliminated the presumption in the current voting model that a general partner controls a limited partnership or similar entity unless that presumption can be overcome. Generally, only a single limited partner that is able to exercise substantive kick-out rights will consolidate. The Company adopted this new standard as required effective January 1, 2016. While adoption of the new standard did not result in any changes to conclusions about whether a joint venture was consolidated or unconsolidated, the Company has determined that certain of its joint ventures and the Operating Partnership will now qualify as variable interest entities ("VIEs") and therefore will require additional disclosures. See Note 6 for further discussion. In April 2015, the FASB issued a new standard which requires companies to present debt financing costs as a direct deduction from the carrying amount of the associated debt liability rather than as an asset, consistent with the presentation of debt discounts on the consolidated balance sheets. Companies will be permitted to present debt issuance costs related to line of credit arrangements as an asset and amortize these costs over the term of the arrangement, regardless of whether there are any outstanding borrowings on the arrangement. The new standard must be applied retrospectively to all prior periods presented in the consolidated financial statements. The Company adopted this standard as required effective January 1, 2016 and other than presentation on the consolidated balance sheets, it did not have a material effect on its consolidated results of operations or financial position. As of December 31, 2016 , $12.1 million , $16.3 million and $26.4 million of deferred financing costs were included within other assets, mortgage notes payable, net and notes, net respectively, on the consolidated balance sheets. As of December 31, 2015, the following amounts of deferred financing costs were reclassified (amounts in thousands): As Originally Reclassification As Presented Deferred financing costs, net $ 54,004 $ (54,004 ) $ — Other assets $ 422,027 $ 6,872 $ 428,899 Mortgage notes payable, net $ 4,704,870 $ (19,736 ) $ 4,685,134 Notes, net $ 5,876,352 $ (27,396 ) $ 5,848,956 In January 2016, the FASB issued a new standard which requires companies to measure all equity securities with readily determinable fair values at fair value on the balance sheet, with changes in fair value recognized in net income. The new standard will be effective for the Company beginning on January 1, 2018. The Company does not expect that this will have a material effect on its consolidated results of operations or financial position. In February 2016, the FASB issued a new leases standard which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The new standard is expected to impact the Company’s consolidated financial statements as, among other things, the Company has certain operating ground lease arrangements for which it is the lessee. The new standard will be effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position. In March 2016, the FASB issued a new standard which simplifies several aspects of the accounting for employee share-based payment transactions, including income tax consequences, classification of awards as equity or liability, statement of cash flows classification and policy election options for forfeitures. The new standard was effective for the Company beginning on January 1, 2017. The Company will continue to estimate the number of awards expected to be forfeited and adjust the estimate when it is no longer probable that the employee will fulfill the service condition, as is currently required. The Company does not expect that this will have a material effect on its consolidated results of operations or financial position. In June 2016, the FASB issued a new 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 will require entities to estimate a lifetime expected credit loss for most financial instruments, including lease and other trade receivables. The new standard will be effective for the Company beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019. The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position. In August 2016 and October 2016, the FASB issued new standards to clarify how specific transactions are classified and presented on the statement of cash flows. Among other clarifications, the new standards specifically provide guidance for the following items within the statement of cash flows which have required significant judgment in the past: • Cash payments related to debt prepayments or extinguishment costs are to be classified within financing activities; • The portion of the cash payment made to settle a zero-coupon bond or a bond with an insignificant cash coupon attributable to accreted interest related to a debt discount is to be classified as a cash outflow within operating activities, and the portion attributable to the principal is to be classified within financing activities; • Insurance settlement proceeds are to be classified based on the nature of the loss; • Companies must elect to classify distributions received from equity method investees using either a cumulative earnings approach or a look-through approach and the election must be disclosed; and • Restricted

Equity, Capital and Other Inter

Equity, Capital and Other Interests	12 Months Ended
	Dec. 31, 2016
Equity, Capital and other Interests [Abstract]
Equity Capital And Other Interests [Text Block]	. Equity, Capital and Other Interests Equity and Redeemable Noncontrolling Interests of Equity Residential The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and restricted units) for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 Common Shares Common Shares outstanding at January 1, 364,755,444 362,855,454 360,479,260 Common Shares Issued: Conversion of OP Units 88,838 208,307 94,671 Exercise of share options 815,044 1,456,363 2,086,380 Employee Share Purchase Plan (ESPP) 63,909 68,462 68,807 Restricted share grants, net 147,689 168,142 169,722 Common Shares Other: Conversion of restricted shares to restricted units — (1,284 ) (12,146 ) Repurchased and retired — — (31,240 ) Common Shares outstanding at December 31, 365,870,924 364,755,444 362,855,454 Units Units outstanding at January 1, 14,427,164 14,298,691 14,180,376 Restricted unit grants, net 287,749 335,496 200,840 Conversion of restricted shares to restricted units — 1,284 12,146 Conversion of OP Units to Common Shares (88,838 ) (208,307 ) (94,671 ) Units outstanding at December 31, 14,626,075 14,427,164 14,298,691 Total Common Shares and Units outstanding at December 31, 380,496,999 379,182,608 377,154,145 Units Ownership Interest in Operating Partnership 3.8 % 3.8 % 3.8 % 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”. Subject to certain exceptions (including the “book-up” requirements of restricted units), the Noncontrolling Interests – Operating Partnership may exchange their Units with EQR for Common Shares on a one-for-one basis. The carrying value of the Noncontrolling Interests – Operating Partnership (including redeemable interests) is allocated based on the number of Noncontrolling Interests – Operating Partnership Units in total in proportion to the number of Noncontrolling Interests – Operating Partnership Units in total plus the number of Common Shares. Net income is allocated to the Noncontrolling Interests – Operating Partnership 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 Units requesting an exchange of their OP Units with EQR. Once the Operating Partnership elects not to redeem the Noncontrolling Interests – Operating Partnership Units for cash, EQR is obligated to deliver Common Shares to the exchanging holder of the Noncontrolling Interests – Operating Partnership Units. The Noncontrolling Interests – Operating Partnership Units 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 are differentiated and referred to as “Redeemable Noncontrolling Interests – Operating Partnership”. 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 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 Units that are classified in permanent equity at December 31, 2016 and 2015 . The carrying value of the Redeemable Noncontrolling Interests – Operating Partnership is allocated based on the number of Redeemable Noncontrolling Interests – Operating Partnership Units in proportion to the number of Noncontrolling Interests – Operating Partnership Units in total. Such percentage of the total carrying value of Units which is ascribed to the Redeemable Noncontrolling Interests – Operating Partnership is then adjusted to the greater of carrying value or fair market value as described above. As of December 31, 2016 , the Redeemable Noncontrolling Interests – Operating Partnership have a redemption value of approximately $442.1 million , which represents the value of Common Shares that would be issued in exchange with the Redeemable Noncontrolling Interests – Operating Partnership Units. The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership for the years ended December 31, 2016 , 2015 and 2014 , respectively (amounts in thousands): 2016 2015 2014 Balance at January 1, $ 566,783 $ 500,733 $ 363,144 Change in market value (115,093 ) 64,378 139,818 Change in carrying value (9,598 ) 1,672 (2,229 ) Balance at December 31, $ 442,092 $ 566,783 $ 500,733 Net proceeds from EQR Common Share and Preferred Share (see definition below) offerings 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 offering proceeds from Common Shares and Preferred Shares are allocated between shareholders’ equity and Noncontrolling Interests – Operating Partnership to account for the change in their respective percentage ownership of the underlying equity of ERPOP. 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 as of December 31, 2016 and 2015 : Amounts in thousands Redemption Annual December 31, 2016 December 31, 2015 Preferred Shares of beneficial interest, $0.01 par value; 8.29% Series K Cumulative Redeemable Preferred; liquidation 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the redemption date, redeemable preferred shares may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares are payable quarterly. During 2015, the Company repurchased and retired 254,400 Series K Preferred Shares with a par value of $12.7 million for total cash consideration of approximately $16.3 million . As a result of this partial redemption, the Company incurred a cash charge of approximately $3.5 million which was recorded as a premium on the redemption of Preferred Shares. Capital and Redeemable Limited Partners of ERP Operating Limited Partnership The following tables present the changes in the Operating Partnership's issued and outstanding Units and in the limited partners' Units for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 General and Limited Partner Units General and Limited Partner Units outstanding at January 1, 379,182,608 377,154,145 374,659,636 Issued to General Partner: Exercise of EQR share options 815,044 1,456,363 2,086,380 EQR's Employee Share Purchase Plan (ESPP) 63,909 68,462 68,807 EQR's restricted share grants, net 147,689 168,142 169,722 Issued to Limited Partners: Restricted unit grants, net 287,749 335,496 200,840 OP Units Other: Repurchased and retired — — (31,240 ) General and Limited Partner Units outstanding at December 31, 380,496,999 379,182,608 377,154,145 Limited Partner Units Limited Partner Units outstanding at January 1, 14,427,164 14,298,691 14,180,376 Limited Partner restricted unit grants, net 287,749 335,496 200,840 Conversion of EQR restricted shares to restricted units — 1,284 12,146 Conversion of Limited Partner OP Units to EQR Common Shares (88,838 ) (208,307 ) (94,671 ) Limited Partner Units outstanding at December 31, 14,626,075 14,427,164 14,298,691 Limited Partner Units Ownership Interest in Operating Partnership 3.8 % 3.8 % 3.8 % The Limited Partners of the Operating Partnership as of December 31, 2016 include 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. Subject to certain exceptions (including the “book-up” requirements of restricted units), Limited Partners may exchange their Units with EQR for Common Shares on a one-for-one basis. The carrying value of the Limited Partner Units (including redeemable interests) is allocated based on the number of Limited Partner Units in total in proportion to the number of Limited Partner Units in total plus the number of General Partner Units. Net income is allocated to the Limited Partner Units 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 Limited Partner Units requesting an exchange of their OP Units with EQR. Once the Operating Partnership elects not to redeem the Limited Partner Units for cash, EQR is obligated to deliver Common Shares to the exchanging limited partner. The Limited Partner Units 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 Limited Partner Units are differentiated and referred to as “Redeemable Limited Partner Units”. 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 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. EQR has the ability to deliver unregistered Common Shares for the remaining portion of the Limited Partner Units that are classified in permanent equity at December 31, 2016 and 2015. The carrying value of the Redeemable Limited Partner Units is allocated based on the number of Redeemable Limited Partner Units in proportion to the number of Limited Partner Units in total. Such percentage of the total carrying value of Limited Partner Units which is ascribed to the Redeemable Limited Partner Units is then adjusted to the greater of carrying value or fair market value as described above. As of December 31, 2016 , the Redeemable Limited Partner Units have a redemption value of approximately $442.1 million , which represents the value of Common Shares that would be issued in exchange with the Redeemable Limited Partner Units. The following table presents the changes in the redemption value of the Redeemable Limited Partners for the years ended December 31, 2016 , 2015 and 2014 , respectively (amounts in thousands): 2016 2015 2014 Balance at January 1, $ 566,783 $ 500,733 $ 363,144 Change in market value (115,093 ) 64,378 139,818 Change in carrying value (9,598 ) 1,672 (2,229 ) Balance at December 31, $ 442,092 $ 566,783 $ 500,733 EQR contributes all net proceeds from its various equity offerings (including proceeds from exercise of options for Common Shares) 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). The following table presents the Operating Partnership's issued and outstanding “Preference Units” as of December 31, 2016 and 2015 : Amounts in thousands Redemption Annual December 31, 2016 December 31, 2015 Preference Units: 8.29% Series K Cumulative Redeemable Preference Units; 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the redemption date, redeemable preference units may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares. (2) Dividends on Preference Units are payable quarterly. During 2015, the Operating Partnership repurchased and retired 254,400 Series K Preferred Shares with a par value of $12.7 million for total cash consideration of approximately $16.3 million , in conjunction with the concurrent redemption of the corresponding Company Preferred Shares. As a result of this partial redemption, the Operating Partnership incurred a cash charge of approximately $3.5 million which was recorded as a premium on the redemption of Preference Units. 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 on June 28, 2016 and expires on June 28, 2019. 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). In September 2009, the Company announced the establishment of an At-The-Market (“ATM”) share offering program which would allow EQR to sell Common Shares from time to time into the existing trading market at current market prices as well as through negotiated transactions. Per the terms of ERPOP's partnership agreement, EQR contributes the net proceeds from 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). The program currently has a maturity of June 2019. EQR has the authority to issue 13.0 million shares but has not issued any shares under this program since September 2012. The Company may repurchase up to 13.0 million Common Shares under its share repurchase program. No shares were repurchased during the years ended December 31, 2016 and 2015. As of December 31, 2016 , EQR has authorization to repurchase up to 13.0 million of its shares under the repurchase program. During the year ended December 31, 2014, EQR repurchased 31,240 of its Common Shares at an average price of $56.87 per share for total consideration of $1.8 million . These shares were retired subsequent to the repurchases. Concurrent with these transactions, ERPOP repurchased and retired 31,240 OP Units previously issued to EQR. All of the shares repurchased during the year ended December 31, 2014 were repurchased from employees at the then current market prices to cover the minimum statutory tax withholding obligations related to the vesting of employees' restricted shares. During the year ended December 31, 2014, the Company acquired all of its partners' interests in one consolidated partially owned property consisting of 268 apartment units and one consolidated partially owned land parcel for $5.5 million . In conjunction with these transactions, the Company reduced paid in capital (included in general partner's capital in the Operating Partnership's financial statements) by $2.3 million , Noncontrolling Interests – Partially Owned Properties by $2.2 million and other liabilities by $1.0 million .

Real Estate

Real Estate	12 Months Ended
	Dec. 31, 2016
Real Estate [Abstract]
Real Estate Disclosure [Text Block]	4. Real Estate, Real Estate Held for Sale and Lease Intangibles The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of December 31, 2016 and 2015 (amounts in thousands): 2016 2015 Land $ 5,899,862 $ 5,864,046 Depreciable property: Buildings and improvements 16,913,430 16,346,829 Furniture, fixtures and equipment 1,346,300 1,207,098 In-Place lease intangibles 470,849 483,160 Projects under development: Land 115,876 284,995 Construction-in-progress 521,292 837,381 Land held for development: Land 84,440 120,007 Construction-in-progress 34,376 38,836 Investment in real estate 25,386,425 25,182,352 Accumulated depreciation (5,360,389 ) (4,905,406 ) Investment in real estate, net $ 20,026,036 $ 20,276,946 The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of December 31, 2016 and 2015 (amounts in thousands): Description Balance Sheet Location 2016 2015 Assets Ground lease intangibles – below market Other Assets $ 178,251 $ 178,251 Retail lease intangibles – above market Other Assets 1,260 1,260 Lease intangible assets 179,511 179,511 Accumulated amortization (17,972 ) (13,451 ) Lease intangible assets, net $ 161,539 $ 166,060 Liabilities Ground lease intangibles – above market Other Liabilities $ 2,400 $ 2,400 Retail lease intangibles – below market Other Liabilities 5,270 5,270 Lease intangible liabilities 7,670 7,670 Accumulated amortization (4,509 ) (3,414 ) Lease intangible liabilities, net $ 3,161 $ 4,256 During the years ended December 31, 2016 , 2015 and 2014 , the Company amortized approximately $4.3 million in each year of above and below market ground lease intangibles which is included (net increase) in property and maintenance expense in the accompanying consolidated statements of operations and comprehensive income. During the years ended December 31, 2016 , 2015 and 2014 , the Company amortized approximately $0.9 million , $0.9 million and $1.1 million , respectively, of above and below market retail lease intangibles which is included (net increase) in rental income in the accompanying consolidated statements of operations and comprehensive income. The following table provides a summary of the aggregate amortization expense for above and below market ground lease intangibles and retail lease intangibles for each of the next five years (amounts in thousands): 2017 2018 2019 2020 2021 Ground lease intangibles $ 4,321 $ 4,321 $ 4,321 $ 4,321 $ 4,321 Retail lease intangibles (540 ) (71 ) (71 ) (71 ) (67 ) Total $ 3,781 $ 4,250 $ 4,250 $ 4,250 $ 4,254 Acquisitions and Dispositions During the year ended December 31, 2016 , the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 4 573 $ 249,334 Total 4 573 $ 249,334 (1) Purchase price includes an allocation of approximately $98.0 million to land and $151.3 million to depreciable property. During the year ended December 31, 2015 , the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 4 625 $ 296,037 Land Parcels (2) — — 27,800 Total 4 625 $ 323,837 (1) Purchase price includes an allocation of approximately $44.7 million to land and $251.3 million to depreciable property. (2) The Company acquired three contiguous land parcels in San Francisco during 2015 which will be combined for future development. During the year ended December 31, 2016 , the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Consolidated: Rental Properties (1) 98 29,440 $ 6,811,503 Land Parcels — — 57,455 Unconsolidated: Rental Properties (2) 1 336 74,500 Total 99 29,776 $ 6,943,458 (1) Includes the Starwood Portfolio sale (see further discussion below) representing 72 operating properties consisting of 23,262 apartment units for $5.365 billion . (2) The Company owned a 20% interest in this unconsolidated rental property. Sale price listed is the gross sale price. The Company's share of the net sales proceeds approximated $12.4 million . The Company recognized a net gain on sales of real estate properties of approximately $4.0 billion (inclusive of $3.2 billion on the Starwood Portfolio sale), a net gain on sales of land parcels of approximately $15.7 million and a net gain on sales of unconsolidated entities of approximately $8.9 million on the above sales. During the year ended December 31, 2015 , the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Consolidated: Rental Properties (1) 8 1,857 $ 513,312 Total 8 1,857 $ 513,312 (1) Includes a 193,230 square foot medical office building adjacent to our Longfellow Place property in Boston with a sales price of approximately $123.3 million which is not included in the Company's property and apartment unit counts. The Company recognized a net gain on sales of real estate properties of approximately $335.1 million on the above sales. Starwood Disposition Following the approval by the Company's Board of Trustees, the Company executed an agreement with controlled affiliates of Starwood Capital Group ("Starwood") on October 23, 2015 to sell a portfolio of 72 operating properties consisting of 23,262 apartment units located in five markets across the United States for $5.365 billion (the "Starwood Transaction" or "Starwood Portfolio"). As of December 31, 2015, Starwood had deposited $250.0 million in cash into escrow as earnest money, which was non-refundable unless the Company defaulted on the sales agreement. On January 26 and 27, 2016, the Company closed on the sale of the entire portfolio described above. As a result, the Starwood Transaction met the held for sale criteria at December 31, 2015 . In accordance with this classification, the Company ceased depreciation on all assets in the Starwood Portfolio as of November 1, 2015 and the following assets were classified as held for sale in the accompanying consolidated balance sheets at December 31, 2015 (amounts in thousands): December 31, 2015 Land $ 602,737 Depreciable property: Buildings and improvements 2,386,489 Furniture, fixtures and equipment 335,565 In-Place lease intangibles 35,554 Real estate held for sale before accumulated depreciation 3,360,345 Accumulated depreciation (1,179,210 ) Real estate held for sale $ 2,181,135 The following table provides the operating segments/locations of the properties and apartment units sold in the Starwood Transaction, which represents substantially all of the assets in the Company's South Florida and Denver markets and certain assets in the Washington D.C., Seattle and Los Angeles markets. The sale of these properties represents the continuation of the Company's long-term strategy of investing in six core coastal markets. See Note 11 for further discussion. Markets/Metro Areas Properties Apartment Units South Florida 33 10,742 Denver 18 6,635 Washington D.C. 10 3,020 Seattle 8 1,721 Los Angeles 3 1,144 Total 72 23,262 The Company used proceeds from the Starwood Transaction and other 2016 sales discussed above to pay special dividends of $8.00 per share/unit (approximately $3.0 billion ) on March 10, 2016 and $3.00 per share/unit (approximately $1.1 billion ) on October 14, 2016. The Company used the majority of the remaining proceeds to reduce aggregate indebtedness in order to make the transaction leverage neutral. See Note 8 for further discussion. Other In December 2011, the Company and Toll Brothers (NYSE: TOL) jointly acquired a vacant land parcel at 400 Park Avenue South in New York City. The Company's and Toll Brothers' allocated portions of the purchase price were approximately $76.1 million and $57.9 million , respectively. The acquisition was financed through contributions by the Company and Toll Brothers of approximately $102.5 million and $75.7 million , respectively, which included the land purchase noted above, restricted deposits and taxes and fees. Until the core and shell of the building were complete, the building and land were owned jointly and were required to be consolidated on the Company's balance sheet as the Company was the managing member and Toll Brothers did not have substantive kick-out or participating rights. In July 2015, the Company recorded the master condominium declaration for this development project and as a result, the Toll Brothers’ portion of the property was deconsolidated from the Company's balance sheet. The Company now solely owns the rental portion of the building (floors 2-22) and the ground floor retail and Toll Brothers solely owns the for sale portion of the building (floors 23-40). The joint venture no longer owns any real property. In conjunction with this transaction, the Company reduced investment in real estate by $116.7 million , noncontrolling interests in partially owned properties by $117.3 million and accrued retainage by $1.1 million and increased other liabilities by $1.7 million (to account for Toll Brothers' restricted cash still held by the Company). The deconsolidation of the Toll Brothers' portion of the project had no impact on the consolidated results of operations and comprehensive income.

Commitments to Acquire_Dispose

Commitments to Acquire/Dispose of Real Estate	12 Months Ended
	Dec. 31, 2016
Commitments to Acquire Dispose of Real Estate [Abstract]
Commitments To Acquire Dispose Of Real Estate Text Block	5. Commitments to Acquire/Dispose of Real Estate The Company has not entered into any separate agreements to acquire rental properties or land parcels as of February 17, 2017. The Company has entered into separate agreements to dispose of the following (sales price in thousands): Properties Apartment Units Sales Price Rental Properties 2 592 $ 98,700 Land Parcels (two) — — 36,150 Total 2 592 $ 134,850 The closings of these pending transactions are subject to certain conditions and restrictions, therefore, there can be no assurance that these transactions will be consummated or that the final terms will not differ in material respects from those summarized in the preceding paragraphs.

Investments in Partially Owned

Investments in Partially Owned Entities	12 Months Ended
	Dec. 31, 2016
Investments in Partially Owned Entities [Abstract]
Investments in Partially Owned Entities	6. Investments in Partially Owned Entities The Company has co-invested in various properties with unrelated third parties which are either consolidated or accounted for under the equity method of accounting (unconsolidated). The following tables and information summarize the Company’s investments in partially owned entities as of December 31, 2016 (amounts in thousands except for project and apartment unit amounts): Consolidated Unconsolidated (VIE) (Non-VIE) (VIE) (1) Total Total properties 17 2 — 2 Total apartment units 3,215 945 — 945 Balance sheet information at 12/31/16 (at 100%): ASSETS Investment in real estate $ 646,320 $ 235,821 $ 172,995 $ 408,816 Accumulated depreciation (211,038 ) (32,881 ) (44,544 ) (77,425 ) Investment in real estate, net 435,282 202,940 128,451 331,391 Cash and cash equivalents 30,271 5,287 47 5,334 Investments in unconsolidated entities 46,908 — — — Deposits – restricted 345 262 — 262 Other assets 26,203 157 334 491 Total assets $ 539,009 $ 208,646 $ 128,832 $ 337,478 LIABILITIES AND EQUITY/CAPITAL Mortgage notes payable, net (2) $ 301,110 $ 145,424 $ — $ 145,424 Accounts payable & accrued expenses 1,088 189 135 324 Accrued interest payable 1,037 691 — 691 Other liabilities 600 268 70 338 Security deposits 1,850 493 — 493 Total liabilities 305,685 147,065 205 147,270 Noncontrolling Interests – Partially Owned Properties/Partners' equity 10,609 59,115 86,120 145,235 Company equity/General and Limited Partners' Capital 222,715 2,466 42,507 44,973 Total equity/capital 233,324 61,581 128,627 190,208 Total liabilities and equity/capital $ 539,009 $ 208,646 $ 128,832 $ 337,478 Consolidated Unconsolidated (VIE) (Non-VIE) (VIE) (1) Total Operating information for the year ended 12/31/16 (at 100%): Operating revenue $ 90,634 $ 26,615 $ 5,214 $ 31,829 Operating expenses 21,647 9,088 2,023 11,111 Net operating income 68,987 17,527 3,191 20,718 Property management 3,190 776 75 851 General and administrative/other 328 2 81 83 Depreciation 20,764 10,510 5,501 16,011 Operating income (loss) 44,705 6,239 (2,466 ) 3,773 Interest and other income 53 — — — Other expenses (8 ) — — — Interest: Expense incurred, net (13,857 ) (8,289 ) — (8,289 ) Amortization of deferred financing costs (345 ) (1 ) — (1 ) Income (loss) before income and other taxes and (loss) 30,548 (2,051 ) (2,466 ) (4,517 ) Income and other tax (expense) benefit (73 ) (13 ) — (13 ) (Loss) from investments in unconsolidated entities (1,439 ) — — — Net income (loss) $ 29,036 $ (2,064 ) $ (2,466 ) $ (4,530 ) (1) Includes the Company's unconsolidated interest in an entity that owns the land underlying our Wisconsin Place apartment property and owns and operates the parking facility. This entity is excluded from the property and apartment unit count. (2) All debt is non-recourse to the Company. Note: The above tables exclude EQR's ownership interest in ERPOP and the Company's interests in unconsolidated joint ventures established in connection with the acquisition of certain real estate related assets from Archstone Enterprise LP (such assets are referred to herein as "Archstone"). These ventures owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation, as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries. The preferred interests had an aggregate liquidation value of $39.9 million at December 31, 2016 . The ventures are owned 60% by the Company. See below for further discussion. During the year ended December 31, 2016 , the Company and its joint venture partners sold two consolidated partially owned properties consisting of 556 apartment units and recognized a net gain on sale of $54.3 million as well as one unconsolidated partially owned property consisting of 336 apartment units and recognized a net gain on the sale of approximately $8.9 million . Operating Properties The Company has various equity interests in certain limited partnerships owning 16 properties containing 2,783 apartment units. Each partnership owns a multifamily property. The Company is the general partner of these limited partnerships and is responsible for managing the operations and affairs of the partnerships as well as making all decisions regarding the businesses of the partnerships. The limited partners are not able to exercise substantive kick-out or participating rights. As a result, the partnerships qualify as VIEs. The Company has a controlling financial interest in the VIEs and, thus, is the VIEs' primary beneficiary. The Company has both the power to direct the activities of the VIEs that most significantly impact the VIEs' economic performance as well as the obligation to absorb losses or the right to receive benefits from the VIEs that could potentially be significant to the VIEs. As a result, the partnerships are required to be consolidated on the Company's balance sheet. The Company has a 75% equity interest in the Wisconsin Place joint venture. The project contains a mixed-use site located in Chevy Chase, Maryland consisting of residential, retail, office and accessory uses, including underground parking facilities. The joint venture owns the 432 unit residential component, but has no ownership interest in the retail and office components. At December 31, 2016 , the residential component had a net book value of $170.8 million . The Company is the managing member and is responsible for conducting all administrative day-to-day matters and affairs of the joint venture as well as implementing all decisions with respect to the joint venture. The limited partner is not able to exercise substantive kick-out or participating rights. As a result, the joint venture qualifies as a VIE. The Company has a controlling financial interest in the VIE and, thus, is the VIE's primary beneficiary. The Company has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance as well as the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. As a result, the entity that owns the residential component is required to be consolidated on the Company's balance sheet. The Wisconsin Place joint venture also retains an unconsolidated interest in an entity that owns the land underlying the entire project and owns and operates the parking facility. At December 31, 2016 , the basis of this investment was $46.9 million . The joint venture, as a limited partner, does not have substantive kick-out or participating rights in the entity. As a result, the entity qualifies as a VIE. The joint venture does not have a controlling financial interest in the VIE and is not the VIE's primary beneficiary. The joint venture does not have the power to direct the activities of the VIE that most significantly impact the VIE's economic performance or the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. As a result, the entity that owns the land and owns and operates the parking facility is unconsolidated and recorded using the equity method of accounting. The Company has a 20% equity interest in each of the Nexus Sawgrass and Domain joint ventures. The Nexus Sawgrass joint venture owns a 501 unit apartment property located in Sunrise, Florida and the Company's interest had a basis of $5.0 million at December 31, 2016 . The Domain joint venture owns a 444 unit apartment property located in San Jose, California and the Company's interest had a basis of $9.3 million at December 31, 2016 . Nexus Sawgrass and Domain were completed and stabilized during the quarters ended September 30, 2014 and March 31, 2015, respectively. Construction on both properties was predominantly funded with long-term, non-recourse secured loans from the partner. The mortgage loan on Nexus Sawgrass has a current unconsolidated outstanding balance of $48.6 million , bears interest at 5.60% and matures January 1, 2021 . The mortgage loan on Domain has a current unconsolidated outstanding balance of $96.8 million , bears interest at 5.75% and matures January 1, 2022 . While the Company is the managing member of both of the joint ventures, was responsible for constructing both of the properties and gave certain construction cost overrun guarantees, the joint venture partner has significant participating rights and has active involvement in and oversight of the operations. As a result, the entities do not qualify as VIEs. The Company alone does not have the power to direct the activities of the entities that most significantly impact the entities' economic performance and as a result, the entities are unconsolidated and recorded using the equity method of accounting. The Company currently has no further funding obligations related to these properties. Other 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. As a result, ERPOP is required to be consolidated on EQR's balance sheet. On February 27, 2013, in connection with the acquisition of Archstone, subsidiaries of the Company entered into three limited liability company agreements (collectively, the “Residual JV”). The Residual JV owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation. The Residual JV is owned 60% by the Company and 40% by its joint venture partner. The Company's initial investment was $147.6 million and the Company's basis at December 31, 2016 was a net obligation of $1.1 million . The Residual JV is managed by a Management Committee consisting of two members from each of the Company and its joint venture partner. Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners. As a result, the Residual JV does not qualify as a VIE. The Company alone does not have the power to direct the activities of the Residual JV that most significantly impact the Residual JV's economic performance and as a reuslt, the Residual JV is unconsolidated and recorded using the equity method of accounting. The Residual JV has sold all of the real estate assets that were acquired as part of the acquisition of Archstone, including all of the German assets, and is in the process of winding down all remaining activities. On February 27, 2013, in connection with the acquisition of Archstone, a subsidiary of the Company entered into a limited liability company agreement (the “Legacy JV”), through which they assumed obligations of Archstone in the form of preferred interests, some of which are governed by tax protection arrangements. At December 31, 2016 , the remaining preferred interests had an aggregate liquidation value of $39.9 million , our share of which is included in other liabilities in the accompanying consolidated balance sheets. Obligations of the Legacy JV are borne 60% by the Company and 40% by its joint venture partner. The Legacy JV is managed by a Management Committee consisting of two members from each of the Company and its joint venture partner. Both partners have equal participation in the Management Committee and all significant participating rights are shared by both partners. As a result, the Legacy JV does not qualify as a VIE. The Company alone does not have the power to direct the activities of the Legacy JV that most significantly impact the Legacy JV's economic performance and as a result, the Legacy JV is unconsolidated and recorded using the equity method of accounting.

Deposits - Restricted

Deposits - Restricted	12 Months Ended
	Dec. 31, 2016
Deposits - Restricted [Abstract]
Restricted Assets Disclosure [Text Block]	7. Deposits – Restricted and Escrow Deposits – Mortgage The following table presents the Company’s restricted deposits as of December 31, 2016 and 2015 (amounts in thousands): December 31, December 31, Tax-deferred (1031) exchange proceeds $ 38,847 $ — Earnest money on pending acquisitions — 1,000 Restricted deposits on real estate investments 733 6,077 Resident security and utility deposits 37,007 48,458 Other 359 358 Totals $ 76,946 $ 55,893 The following table presents the Company’s escrow deposits as of December 31, 2016 and 2015 (amounts in thousands): December 31, December 31, Real estate taxes and insurance $ 2,003 $ 1,977 Replacement reserves 3,428 3,962 Mortgage principal reserves/sinking funds 58,652 50,155 Other 852 852 Totals $ 64,935 $ 56,946

Debt

Debt	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	8. Debt EQR does not have any indebtedness as all debt is incurred by the Operating Partnership. EQR guarantees the Operating Partnership’s revolving credit facility up to the maximum amount and for the full term of the facility. See Note 2 for a discussion regarding adoption of the new accounting standard impacting deferred financing costs. Mortgage Notes Payable As of December 31, 2016 , the Company had outstanding mortgage debt of approximately $4.1 billion . During the year ended December 31, 2016 , the Company: • Repaid $440.8 million of 6.256% mortgage debt held in a Fannie Mae loan pool maturing in 2017 and incurred a prepayment penalty of approximately $29.3 million ; • Repaid $65.5 million of various tax-exempt mortgage bonds maturing in 2026 through 2037 and incurred a prepayment penalty of approximately $0.2 million ; • Repaid $75.9 million of conventional fixed-rate mortgage loans and incurred prepayment penalties of approximately $2.2 million ; • Repaid $0.9 million of conventional floating-rate mortgage loans; • Repaid $8.5 million of scheduled principal repayments on various mortgage debt; and • Assumed $43.4 million of mortgage debt on one acquired property. The Company recorded $1.6 million of write-offs of unamortized deferred financing costs during the year ended December 31, 2016 as additional interest expense related to debt extinguishment of mortgages. The Company also recorded $20.7 million of write-offs of net unamortized premiums during the year ended December 31, 2016 as a reduction of interest expense related to debt extinguishment of mortgages. As of December 31, 2016 , the Company had $601.9 million of secured debt subject to third party credit enhancement. As of December 31, 2016 , scheduled maturities for the Company’s outstanding mortgage indebtedness were at various dates through May 28, 2061 . At December 31, 2016 , the interest rate range on the Company’s mortgage debt was 0.10% to 7.20% . During the year ended December 31, 2016 , the weighted average interest rate on the Company’s mortgage debt was 4.34% . The historical cost, net of accumulated depreciation, of encumbered properties was $5.0 billion and $6.0 billion at December 31, 2016 and 2015 , respectively. As of December 31, 2015 , the Company had outstanding mortgage debt of approximately $4.7 billion . During the year ended December 31, 2015 , the Company repaid $368.5 million of mortgage loans. The Company recorded $0.6 million of write-offs of unamortized deferred financing costs during the year ended December 31, 2015 as additional interest expense related to debt extinguishment of mortgages. The Company also recorded $1.4 million of write-offs of net unamortized premiums during the year ended December 31, 2015 as a reduction of interest expense related to debt extinguishment of mortgages. As of December 31, 2015 , the Company had $668.8 million of secured debt subject to third party credit enhancement. As of December 31, 2015 , scheduled maturities for the Company’s outstanding mortgage indebtedness were at various dates through May 28, 2061 . At December 31, 2015 , the interest rate range on the Company’s mortgage debt was 0.01% to 7.25% . During the year ended December 31, 2015 , the weighted average interest rate on the Company’s mortgage debt was 4.23% . Notes The following tables summarize the Company’s unsecured note balances and certain interest rate and maturity date information as of and for the years ended December 31, 2016 and 2015 , respectively: December 31, 2016 Net Principal Balance Interest Rate Ranges Weighted Average Interest Rate Maturity Date Ranges Fixed Rate Public Notes (1) $ 4,397,829 2.85% - 7.57% 4.90% 2017 - 2045 Floating Rate Public Notes (1) 450,250 (1) 1.28% 2019 Totals $ 4,848,079 December 31, 2015 Net Principal Balance Interest Rate Ranges Weighted Average Interest Rate Maturity Date Ranges Fixed Rate Public Notes (1) $ 5,397,552 3.00% - 7.57% 5.30% 2016 - 2045 Floating Rate Public Notes (1) 451,404 (1) 0.93% 2019 Totals $ 5,848,956 (1) Fair value interest rate swaps convert the $450.0 million 2.375% notes due July 1, 2019 to a floating interest rate of 90-Day LIBOR plus 0.61% . The Company’s unsecured public debt contains 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, 2016 and 2015 . 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 on June 28, 2016 and expires on June 28, 2019. 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). During the year ended December 31, 2016 , the Company: • Repaid $228.9 million of 5.125% unsecured notes maturing in 2016 and incurred a prepayment penalty of approximately $1.4 million and repaid the remaining $271.1 million of 5.125% unsecured notes at maturity; • Repaid $400.0 million of 5.375% unsecured notes maturing in 2016 and incurred a prepayment penalty of approximately $9.5 million ; • Repaid $255.9 million of 5.750% unsecured notes maturing in 2017 and incurred a prepayment penalty of approximately $16.5 million ; • Repaid $46.1 million of 7.125% unsecured notes maturing in 2017 and incurred a prepayment penalty of approximately $4.6 million ; • Repaid $250.0 million of 4.625% unsecured notes maturing in 2021 and incurred a prepayment penalty of approximately $31.6 million ; • Repaid $48.0 million of 7.570% unsecured notes maturing in 2026 and incurred a prepayment penalty of approximately $19.3 million ; and • Issued $500.0 million of ten-year 2.85% fixed rate public notes, receiving net proceeds of $496.7 million before underwriting fees, hedge termination costs and other expenses, at an all-in effective interest rate of approximately 3.10% after termination of a forward starting swap in conjunction with the issuance (see Note 9 for further discussion). The Company recorded $1.9 million of write-offs of unamortized deferred financing costs during the year ended December 31, 2016 as additional interest expense related to debt extinguishment of unsecured notes. The Company also recorded $25.2 million of write-offs of net unamortized premiums/discounts/OCI/treasury locks during the year ended December 31, 2016 as additional interest expense related to debt extinguishment of unsecured notes. During the year ended December 31, 2015 , the Company: • Repaid $300.0 million of 6.584% unsecured notes at maturity; • Issued $450.0 million of ten-year 3.375% fixed rate public notes, receiving net proceeds of $447.5 million before underwriting fees, hedge termination costs and other expenses, at an all-in effective interest rate of 3.81% after termination of various forward starting swaps in conjunction with the issuance (see Note 9 for further discussion); and • Issued $300.0 million of thirty-year 4.50% fixed rate public notes, receiving net proceeds of $298.9 million before underwriting fees and other expenses, at an all-in effective interest rate of 4.55% . Line of Credit and Commercial Paper On November 3, 2016, the Company replaced its existing $2.5 billion facility with a $2.0 billion unsecured revolving credit facility maturing January 10, 2022 . The Company has the ability to increase available borrowings by an additional $750.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments. The interest rate on advances under the facility will generally be LIBOR plus a spread (currently 0.825% ), or based on bids received from the lending group, and the Company pays an annual facility fee (currently 12.5 basis points ). Both the spread and the facility fee are dependent on the credit rating of the Company's long-term debt. The Company wrote off $0.4 million in unamortized deferred financing costs related to the old facility. The Company's previous $2.5 billion unsecured revolving credit facility was set to mature on April 2, 2018 . The Company had the ability to increase available borrowings by an additional $500.0 million by adding additional banks to the facility or obtaining the agreement of existing banks to increase their commitments. The interest rate on advances under the facility was generally LIBOR plus a spread (was 0.95% at termination), or based on bids received from the lending group, and the Company paid an annual facility fee (was 15 basis points at termination). Both the spread and the facility fee were dependent on the credit rating of the Company's long-term debt. On February 2, 2015 , the Company entered into an unsecured commercial paper note program in the United States. The Company may borrow up to a maximum of $500.0 million under this program subject to market conditions. The notes will be sold under customary terms in the United States commercial paper note market and will rank pari passu with all of the Company's other unsecured senior indebtedness. As of December 31, 2016 , there was a balance of $20.0 million outstanding on the commercial paper program. As of December 31, 2015 , there was a balance of $387.3 million on the commercial paper program ( $387.5 million in principal outstanding net of an unamortized discount of $0.2 million ). The notes bear interest at various floating rates with a weighted average of 0.90% and 0.56% for the years ended December 31, 2016 and 2015, respectively, and a weighted average maturity of 4 days and 19 days as of December 31, 2016 and 2015, respectively. As of December 31, 2016 , the amount available on the revolving credit facility was $1.96 billion (net of $20.6 million which was restricted/dedicated to support letters of credit and net of the $20.0 million outstanding on the commercial paper program). During the year ended December 31, 2016 , the weighted average interest rate on the revolving credit facility was 1.37% . As of December 31, 2015 , the amount available on the revolving credit facility was $2.07 billion (net of $45.1 million which was restricted/dedicated to support letters of credit and net of the $387.5 million outstanding on the commercial paper program). During the year ended December 31, 2015 , the weighted average interest rate on the revolving credit facility was 1.07% . Other 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, 2016 (amounts in thousands): Year Total 2017 $ 628,458 2018 184,369 2019 1,286,037 2020 1,690,090 2021 941,157 Thereafter 4,366,516 Deferred Financing Costs (42,617 ) Net Unamortized (Discount) (66,752 ) Total $ 8,987,258

Derivative and Other Fair Value

Derivative and Other Fair Value Instruments	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Derivatives and Fair Value [Text Block]	9. Derivative and Other Fair Value 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, including its derivative 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 seeks 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. 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 developed internally by the Company that use as their basis readily observable market parameters (such as forward yield curves and credit default swap data). Employee holdings other than Common Shares within the supplemental executive retirement plan (the “SERP”) are valued using quoted market prices for identical assets and are included in other assets and other liabilities on the consolidated balance sheets. Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners are valued using the quoted market price of Common Shares. The fair values disclosed for mortgage notes payable and unsecured debt (including its commercial paper) were calculated using indicative rates provided by lenders of similar loans in the case of mortgage notes payable and the private unsecured debt (including its commercial paper) and quoted market prices for each underlying issuance in the case of the public unsecured notes. The carrying values of the Company’s mortgage notes payable and unsecured debt (including its commercial paper) were approximately $4.1 billion and $4.9 billion , respectively, at December 31, 2016 . The fair values of the Company’s mortgage notes payable and unsecured debt (including its commercial paper) were approximately $4.2 billion (Level 2) and $5.0 billion (Level 2), respectively, at December 31, 2016 . The carrying values of the Company’s mortgage notes payable and unsecured debt (including its commercial paper) were approximately $4.7 billion and $6.2 billion respectively, at December 31, 2015 . The fair values of the Company’s mortgage notes payable and unsecured debt (including its commercial paper) were approximately $4.6 billion (Level 2) and $6.5 billion (Level 2), respectively, at December 31, 2015 . The fair values of the Company’s financial instruments (other than mortgage notes payable, unsecured notes, commercial paper and derivative instruments), including cash and cash equivalents and other financial instruments, approximate their carrying or contract values. The following table summarizes the Company’s consolidated derivative instruments at December 31, 2016 (dollar amounts are in thousands): Fair Value Current Notional Balance $ 450,000 Indicative Interest Rate 2.375 % Maturity Date 2019 (1) Fair Value Hedges – Converts outstanding fixed rate unsecured notes ( $450.0 million 2.375% notes due July 1, 2019 ) to a floating interest rate of 90-Day LIBOR plus 0.61% . 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, 2016 and 2015 , respectively (amounts in thousands): Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2016 Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Derivatives designated as hedging instruments: Interest Rate Contracts: Fair Value Hedges Other Assets $ 1,857 $ — $ 1,857 $ — Supplemental Executive Retirement Plan Other Assets 124,420 124,420 — — Total $ 126,277 $ 124,420 $ 1,857 $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 124,420 $ 124,420 $ — $ — Total $ 124,420 $ 124,420 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 442,092 $ — $ 442,092 $ — Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2015 Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Derivatives designated as hedging instruments: Interest Rate Contracts: Fair Value Hedges Other Assets $ 3,655 $ — $ 3,655 $ — Supplemental Executive Retirement Plan Other Assets 105,942 105,942 — — Total $ 109,597 $ 105,942 $ 3,655 $ — Liabilities Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps Other Liabilities $ 673 $ — $ 673 $ — Supplemental Executive Retirement Plan Other Liabilities 105,942 105,942 — — Total $ 106,615 $ 105,942 $ 673 $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 566,783 $ — $ 566,783 $ — 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, 2016 , 2015 and 2014 , respectively (amounts in thousands): December 31, 2016 Type of Fair Value Hedge Location of Amount of Hedged Item Income Statement Amount of Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ (1,798 ) Fixed rate debt Interest expense $ 1,798 Total $ (1,798 ) $ 1,798 December 31, 2015 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ 2,058 Fixed rate debt Interest expense $ (2,058 ) Total $ 2,058 $ (2,058 ) December 31, 2014 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ 1,597 Fixed rate debt Interest expense $ (1,597 ) Total $ 1,597 $ (1,597 ) 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, 2016 , 2015 and 2014 , respectively (amounts in thousands): Effective Portion Ineffective Portion December 31, 2016 Type of Cash Flow Hedge Amount of Location of Gain/(Loss) Amount of Gain/(Loss) Location of Amount of Gain/(Loss) Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (3,989 ) Interest expense $ (41,758 ) Interest expense $ (74 ) Total $ (3,989 ) $ (41,758 ) $ (74 ) Effective Portion Ineffective Portion December 31, 2015 Type of Cash Flow Hedge Amount of Location of Gain/(Loss) Amount of Gain/(Loss) Location of Amount of Gain/(Loss) Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (814 ) Interest expense $ (18,244 ) Interest expense $ (3,033 ) Total $ (814 ) $ (18,244 ) $ (3,033 ) Effective Portion Ineffective Portion December 31, 2014 Type of Cash Flow Hedge Amount of Location of Gain/(Loss) Amount of Gain/(Loss) Location of Amount of Gain/(Loss) Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (33,215 ) Interest expense $ (16,868 ) Interest expense $ 91 Total $ (33,215 ) $ (16,868 ) $ 91 As of December 31, 2016 and 2015 , there were approximately $113.9 million and $151.8 million in deferred losses, net, included in accumulated other comprehensive (loss), respectively, related to derivative instruments. Based on the estimated fair values of the net derivative instruments at December 31, 2016 , the Company may recognize an estimated $21.9 million of accumulated other comprehensive (loss) as additional interest expense during the year ending December 31, 2017 . In October 2016, the Company paid $4.7 million to settle a forward starting ten-year swap in conjunction with the issuance of $500.0 million of ten-year fixed rate public notes. The ineffective portion of approximately $74,000 and accrued interest of approximately $9,000 were recorded as increases to interest expense. The remaining amount of approximately $4.6 million will be deferred as a component of accumulated other comprehensive (loss) and recognized as an increase to interest expense over the approximate term of the notes. In May 2015, the Company paid a net $15.1 million to settle nine forward starting ten-year swaps in conjunction with the issuance of $450.0 million of ten-year fixed rate public notes. The ineffective portion of approximately $30,000 and accrued interest of approximately $1.2 million were recorded as increases to interest expense. The remaining amount of approximately $13.9 million will be deferred as a component of accumulated other comprehensive (loss) and recognized as an increase to interest expense over the first 9 years and 10.5 months of the notes. During the year ended December 31, 2015, the Company recorded approximately $3.0 million of deferred accumulated other comprehensive (loss) as additional interest expense due to the ineffectiveness of certain forward starting swaps. In June 2014, the Company paid a net $2.0 million to settle seven forward starting ten-year swaps in conjunction with the issuance of $750.0 million of thirty-year fixed rate public notes. The ineffective portion of approximately $0.1 million was recorded as a decrease to interest expense and accrued interest of approximately $1.3 million was recorded as an increase to interest expense. The remaining amount of approximately $0.8 million will be deferred as a component of accumulated other comprehensive (loss) and recognized as an increase to interest expense over the first nine years and ten months of the notes.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share And Earnings Per Unit [Text Block]	10. 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, 2016 2015 2014 Numerator for net income per share – basic: Income from continuing operations $ 4,479,586 $ 907,621 $ 657,101 Allocation to Noncontrolling Interests – Operating Partnership, net (171,491 ) (34,226 ) (24,771 ) Net (income) attributable to Noncontrolling Interests – Partially Owned Properties (16,430 ) (3,657 ) (2,544 ) Preferred distributions (3,091 ) (3,357 ) (4,145 ) Premium on redemption of Preferred Shares — (3,486 ) — Income from continuing operations available to Common Shares, net of Noncontrolling Interests 4,288,574 862,895 625,641 Discontinued operations, net of Noncontrolling Interests 498 382 1,522 Numerator for net income per share – basic $ 4,289,072 $ 863,277 $ 627,163 Numerator for net income per share – diluted: Income from continuing operations $ 4,479,586 $ 907,621 $ 657,101 Net (income) attributable to Noncontrolling Interests – Partially Owned Properties (16,430 ) (3,657 ) (2,544 ) Preferred distributions (3,091 ) (3,357 ) (4,145 ) Premium on redemption of Preferred Shares — (3,486 ) — Income from continuing operations available to Common Shares 4,460,065 897,121 650,412 Discontinued operations, net 518 397 1,582 Numerator for net income per share – diluted $ 4,460,583 $ 897,518 $ 651,994 Denominator for net income per share – basic and diluted: Denominator for net income per share – basic 365,002 363,498 361,181 Effect of dilutive securities: OP Units 13,827 13,576 13,718 Long-term compensation shares/units 3,163 3,546 2,836 Denominator for net income per share – diluted 381,992 380,620 377,735 Net income per share – basic $ 11.75 $ 2.37 $ 1.74 Net income per share – diluted $ 11.68 $ 2.36 $ 1.73 Net income per share – basic: Income from continuing operations available to Common Shares, net of $ 11.75 $ 2.37 $ 1.73 Discontinued operations, net of Noncontrolling Interests — — 0.01 Net income per share – basic $ 11.75 $ 2.37 $ 1.74 Net income per share – diluted: Income from continuing operations available to Common Shares $ 11.68 $ 2.36 $ 1.72 Discontinued operations, net — — 0.01 Net income per share – diluted $ 11.68 $ 2.36 $ 1.73 Note: For additional disclosures regarding the employee share options and restricted shares, see Notes 2 and 12. 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, 2016 2015 2014 Numerator for net income per Unit – basic and diluted: Income from continuing operations $ 4,479,586 $ 907,621 $ 657,101 Net (income) attributable to Noncontrolling Interests – Partially Owned Properties (16,430 ) (3,657 ) (2,544 ) Allocation to Preference Units (3,091 ) (3,357 ) (4,145 ) Allocation to premium on redemption of Preference Units — (3,486 ) — Income from continuing operations available to Units 4,460,065 897,121 650,412 Discontinued operations, net 518 397 1,582 Numerator for net income per Unit – basic and diluted $ 4,460,583 $ 897,518 $ 651,994 Denominator for net income per Unit – basic and diluted: Denominator for net income per Unit – basic 378,829 377,074 374,899 Effect of dilutive securities: Dilution for Units issuable upon assumed exercise/vesting of the Company's long-term compensation shares/units 3,163 3,546 2,836 Denominator for net income per Unit – diluted 381,992 380,620 377,735 Net income per Unit – basic $ 11.75 $ 2.37 $ 1.74 Net income per Unit – diluted $ 11.68 $ 2.36 $ 1.73 Net income per Unit – basic: Income from continuing operations available to Units $ 11.75 $ 2.37 $ 1.73 Discontinued operations, net — — 0.01 Net income per Unit – basic $ 11.75 $ 2.37 $ 1.74 Net income per Unit – diluted: Income from continuing operations available to Units $ 11.68 $ 2.36 $ 1.72 Discontinued operations, net — — 0.01 Net income per Unit – diluted $ 11.68 $ 2.36 $ 1.73 Note: For additional disclosures regarding the employee share options and restricted shares, see Notes 2 and 12.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	11. Individually Significant Dispositions and Discontinued Operations In April 2014, the FASB issued new guidance for reporting discontinued operations. Only disposals representing a strategic shift in operations that has a major effect on a company’s operations and financial results will be presented as discontinued operations. Companies are required to expand their disclosures about discontinued operations to provide more information on the assets, liabilities, income and expenses of the discontinued operations. Companies are also required to disclose the pre-tax income attributable to a disposal of a significant part of a company that does not qualify for discontinued operations reporting. Application of this guidance is prospective from the date of adoption and early adoption was permitted, but only for disposals (or classifications as held for sale) that had not been reported in financial statements previously issued. The new standard was effective January 1, 2015, but the Company early adopted it as allowed effective January 1, 2014. Adoption of this standard resulted in and will likely continue to result in substantially fewer of the Company's dispositions meeting the discontinued operations qualifications. Individually Significant Dispositions The Company concluded that the Starwood Transaction does not qualify for discontinued operations reporting as it does not represent a strategic shift that will have a major effect on the Company’s operations and financial results. The Company has been investing only in its six coastal markets (Boston, New York, Washington D.C., Southern California, San Francisco and Seattle) and has not been acquiring or developing any new assets in its other markets. Over the past several years, the Company has been repositioning its portfolio by selling its suburban assets located in markets outside its six core coastal markets. However, the Company concluded that the Starwood Transaction does qualify as an individually significant component of the Company as the amount received upon disposal exceeded 10% of total assets and NOI (see definition in Note 17) of the Starwood Portfolio represents approximately 1.2% (for the approximate one-month period owned in 2016), 15.7% and 15.4% , respectively, of consolidated NOI for the Company for the years ended December 31, 2016 , 2015 and 2014 . In addition, the Starwood Transaction met the held for sale criteria at December 31, 2015 and was classified as held for sale in the accompanying consolidated balance sheets at December 31, 2015 (see Note 4 for further discussion). In accordance with this classification, the Company ceased depreciation on all assets in the Starwood Portfolio as of November 1, 2015. As a result, the following table summarizes the results of operations attributable to the Starwood Transaction for the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 2015 2014 REVENUES Rental income $ 30,785 $ 427,433 $ 401,134 Total revenues 30,785 427,433 401,134 EXPENSES (1) Property and maintenance 7,838 78,189 76,579 Real estate taxes and insurance 2,912 48,403 46,416 Property management 2 11 11 General and administrative 23 38 24 Depreciation — 87,616 104,104 Total expenses 10,775 214,257 227,134 Operating income 20,010 213,176 174,000 Interest and other income 21 1 1 Other expenses — (35 ) (1 ) Interest (2): Expense incurred, net (380 ) (680 ) (701 ) Amortization of deferred financing costs (707 ) (559 ) (98 ) Income and other tax (expense) benefit (1 ) (1 ) (3 ) Net gain on sales of real estate properties 3,161,097 — — Income from operations 3,180,040 211,902 173,198 Income from operations attributable to Noncontrolling Interests – Partially Owned — — (14 ) Income from operations attributable to controlling interests – Operating Partnership 3,180,040 211,902 173,184 Income from operations attributable to Noncontrolling Interests – Operating Partnership (122,152 ) (8,083 ) (6,598 ) Income from operations attributable to controlling interests – Company $ 3,057,888 $ 203,819 $ 166,586 (1) Includes expenses paid in the current period for properties held for sale. (2) Includes only interest expense specific to secured mortgage notes payable for properties held for sale which was repaid at or before closing. Discontinued Operations The Company has presented separately as discontinued operations in all periods the results of operations for all consolidated assets disposed of and all properties held for sale, if any, for properties sold in 2013 and prior years. The amounts included in discontinued operations for the years ended December 31, 2016 , 2015 and 2014 represent trailing activity for properties sold in 2013 and prior years. None of the properties sold during the years ended December 31, 2016 , 2015 and 2014 met the new criteria for reporting discontinued operations. The components of discontinued operations are outlined below and include the results of operations for the respective periods that the Company owned such assets for properties sold in 2013 and prior years during each of the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands). Year Ended December 31, 2016 2015 2014 REVENUES Rental income $ 355 $ 499 $ 1,309 Total revenues 355 499 1,309 EXPENSES (1) Property and maintenance (46 ) (60 ) (141 ) Real estate taxes and insurance (461 ) 65 267 General and administrative 119 85 89 Total expenses (388 ) 90 215 Discontinued operating income 743 409 1,094 Interest and other income 24 3 317 Other expenses (280 ) — — Income and other tax (expense) benefit (12 ) (15 ) (8 ) Discontinued operations 475 397 1,403 Net gain on sales of discontinued operations 43 — 179 Discontinued operations, net $ 518 $ 397 $ 1,582 (1) Includes expenses paid in the current period for properties sold in prior periods related to the Company’s period of ownership.

Share Incentive Plans

Share Incentive Plans	12 Months Ended
	Dec. 31, 2016
Share-based Compensation [Abstract]
Share Incentive Plans	11. 12. 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. On June 16, 2011, the shareholders of EQR approved the Company's 2011 Share Incentive Plan, as amended (the "2011 Plan"). The 2011 Plan originally reserved 12,980,741 Common Shares for issuance, which was subsequently adjusted to 14,725,321 Common Shares in accordance with the provisions of the 2011 Plan as a result of the option adjustments required for the special dividends paid in conjunction with the Starwood Transaction. In conjunction with the approval of the 2011 Plan, no further awards may be granted under the 2002 Share Incentive Plan. The 2011 Plan expires on June 16, 2021. As of December 31, 2016, 8,595,553 shares were available for future issuance. Pursuant to the 2011 Plan and the 2002 Share Incentive Plan, as restated and amended (collectively the “Share Incentive Plans”), officers, trustees and key employees of the Company 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 performance-based awards), subject to conditions and restrictions as described in the Share Incentive Plans. Options, SARs, restricted shares (including performance awards) and restricted units (including performance awards) are sometimes collectively referred to herein as “Awards”. The Options are generally granted at the fair market value of the Company’s Common Shares at the date of grant, vest in three equal installments over a three -year period, are exercisable upon vesting and expire ten years from the date of grant (see additional valuation discussion in Note 2). The exercise price for all Options under the Share Incentive Plans is equal to the fair market value of the underlying Common Shares at the time the Option is granted. Options exercised result in new Common Shares being issued on the open market. The 2002 Share Incentive Plan, as restated and amended, will terminate at such time as 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. Any Options which had vested prior to such a termination would remain exercisable by the holder. Restricted shares are generally granted at the fair market value of the Company's Common Shares at the date of grant. Restricted shares that have been awarded through December 31, 2016 generally vest three years from the award date. In addition, the Company’s unvested restricted shareholders have the same voting rights as any other Common Share holder. During the three -year period of restriction, the Company’s unvested restricted shareholders receive quarterly dividend payments on their shares at the same rate and on the same date as any other Common Share holder. As a result, dividends paid on unvested restricted shares are included as a component of retained earnings (included in general partner's capital in the Operating Partnership's financial statements) 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. If employment is terminated prior to the lapsing of the restriction, the shares are generally canceled. Restricted units are a class of partnership interests that under certain conditions, including vesting, are convertible by the holder into an equal number of OP Units, which are redeemable by the holder for Common Shares on a one-for-one basis or the cash value of such shares at the option of the Company. In connection with the grant of long-term incentive compensation for services provided during a year, officers of the Company are allowed to choose between restricted shares and restricted units. In January 2011, March 2014 and June 2015, certain holders of restricted shares converted these shares into restricted units. Similar to restricted shares, restricted units are generally granted at the fair market value of the Company's Common Shares at the date of grant and generally vest three years from the award date. In addition, restricted unit holders receive quarterly dividend payments on their restricted units at the same rate and on the same date as any other OP Unit holder. As a result, dividends paid on restricted units are included as a component of Noncontrolling Interests – Operating Partnership/Limited Partners' capital 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. If employment is terminated prior to vesting, the restricted units are generally canceled. 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. 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. In January 2015, the Company revised its executive compensation program for the Chairman, Chief Executive Officer and certain other Executive Officers. The long-term portion of the revised program will allow these individuals to earn from 0% to 200% of the target number of performance awards, payable in the form of restricted shares and/or restricted units, as determined by the Company’s relative and absolute Total Shareholder Return (“TSR”) over a forward-looking three-year performance period. The Company’s TSR will be compared to pre-established quantitative performance metrics. In connection with the grant of long-term incentive compensation, the individuals are allowed to choose between restricted shares and restricted units. The grant date fair value of the awards is estimated using a Monte Carlo model, and the resulting expense is recorded regardless of whether the TSR performance measures are achieved, if the required service is delivered. These awards generally vest three years from the award date. The grant date fair value is amortized into expense over the service period. 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/vesting period. In addition, the awards granted as restricted units will receive quarterly partial dividend payments equal to 10% of any common share dividend on the same date as any other OP Unit holder during the three-year performance period. As a result, dividends paid on restricted units are included as a component of Noncontrolling Interests – Operating Partnership/Limited Partners' capital 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. The awards granted as restricted shares will not receive dividends during the three-year performance period. At the end of the three-year performance period, cumulative dividends will be paid for the three-year performance period for any restricted shares or restricted units actually earned, less any dividends already paid on the restricted units. If employment is terminated prior to vesting, the restricted shares and restricted units are generally canceled. Once the Company's absolute and relative TSR is calculated at the end of the three-year performance period, the executive will earn a certain number of restricted shares and/or restricted units. No payout would be made for any return below 50% of the target performance metric. All Trustees, with the exception of the Company's non-executive 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. The non-executive Chairman's grants vest over the same term or period as all other employees. The Company's Share Incentive Plans provide for certain benefits upon retirement. For employees hired prior to January 1, 2009, retirement generally means the termination of employment (other than for cause): (i) on or after age 62; or (ii) prior to age 62 after meeting the requirements of the Rule of 70 (described below). For employees hired after January 1, 2009, retirement generally means the termination of employment (other than for cause) after meeting the requirements of the Rule of 70. For Trustees, retirement generally means termination of service on the Board (other than for cause) on or after age 72. 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 6 months’ advance written notice of his or her intention to retire and sign a release upon termination of employment, releasing the Company from customary claims and agreeing to ongoing non-competition and employee non-solicitation provisions. Under the Company's definitions of retirement, several of its executive officers, including its Chief Executive Officer, and its non-executive Chairman, are retirement eligible. For employees hired prior to January 1, 2009 who retire at or after age 62 (or for Trustees who retire at or after age 72), such employee’s or Trustee's unvested restricted shares, restricted units and share options would immediately vest, and share options would continue to be exercisable for the balance of the applicable ten-year option period, as is provided under the Share Incentive Plans. For all other employees (those hired after January 1, 2009 and those hired before such date who choose to retire prior to age 62), upon such retirement under the Rule of 70 definition of retirement of employees, such employee’s unvested restricted shares, restricted units and share options would continue to vest per the original vesting schedule (subject to immediate vesting upon the occurrence of a subsequent change in control of the Company or the employee’s death), and options would continue to be exercisable for the balance of the applicable ten-year option period, subject to the employee’s compliance with the non-competition and employee non-solicitation provisions. The Rule of 70 does not apply to Trustees. For the individuals mentioned above who receive awards under the executive compensation program and retire at or after age 62 (age 72 for the Chairman of the Board) or under the Rule of 70, the award would be prorated in proportion to the number of days worked in the first year of the three-year performance period and the award would continue to vest per the original vesting schedule, subject to the individual’s compliance with the non-competition and employee non-solicitation provisions. The individual would not receive any payout of shares or units until the final payout is determined at the end of the three-year performance period. If an employee violates the non-competition and employee non-solicitation provisions after such retirement, all unvested restricted shares, unvested restricted units and unvested and vested share options at the time of the violation would be void, unless otherwise determined by the Compensation Committee of the Board of Trustees. The following tables summarize compensation information regarding the restricted shares, restricted units, share options and Employee Share Purchase Plan (“ESPP”) for the three years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 Compensation Expense Compensation Capitalized Restricted Units Compensation Equity Dividends Incurred Restricted shares (2) $ 13,539 $ 1,477 $ — $ 15,016 $ 6,494 Restricted units (2) 13,567 591 4,022 18,180 7,762 Share options 2,839 593 — 3,432 — ESPP discount 585 65 — 650 — Total $ 30,530 $ 2,726 $ 4,022 $ 37,278 $ 14,256 Year Ended December 31, 2015 Compensation Expense Compensation Capitalized Restricted Units In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 13,755 $ 1,311 $ — $ 15,066 $ 1,160 Restricted units (2) 17,311 538 3,654 21,503 1,619 Share options 2,746 1,010 — 3,756 — ESPP discount 795 89 — 884 — Total $ 34,607 $ 2,948 $ 3,654 $ 41,209 $ 2,779 Year Ended December 31, 2014 Compensation Expense Compensation Capitalized Compensation Equity Dividends Incurred Restricted shares $ 9,244 $ 660 $ 9,904 $ 1,012 Restricted units 11,049 920 11,969 1,248 Share options 6,453 896 7,349 — ESPP discount 797 62 859 — Total $ 27,543 $ 2,538 $ 30,081 $ 2,260 (1) Beginning in 2015, the Company allows officers the ability to receive immediately vested restricted units (subject to the book-up provisions and two-year hold restriction) in-lieu of any percentage of their annual cash bonus. (2) Includes performance awards granted under the executive compensation program. Compensation expense is generally recognized for Awards as follows: • Restricted shares, restricted units and share options – Straight-line method over the vesting period of the options, shares or units regardless of cliff or ratable vesting distinctions. • Performance awards – Target amount is recognized under the straight-line method over the vesting period of the shares or units regardless of cliff or ratable vesting distinctions. • 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, 2016 is $8.6 million (excluding 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 1.31 years. See Note 2 for additional information regarding the Company’s share-based compensation. The table below summarizes the Award activity of the Share Incentive Plans for the three years ended December 31, 2016 , 2015 and 2014 : Common Shares Subject to Options Weighted Average Exercise Price per Option Restricted Shares Weighted Average Fair Value per Restricted Share Restricted Weighted Balance at December 31, 2013 8,470,532 $43.67 500,234 $55.79 471,256 $55.67 Awards granted (1) 667,877 $56.72 176,457 $56.56 201,507 $53.82 Awards exercised/vested (2) (3) (4) (2,086,380 ) $39.34 (175,344 ) $53.44 (60,294 ) $53.71 Awards forfeited (19,022 ) $56.32 (6,735 ) $56.57 (667 ) $52.08 Awards expired (2,387 ) $55.24 — — — — Conversion of restricted shares — — (12,146 ) — 12,146 — Balance at December 31, 2014 7,030,620 $46.16 482,466 $56.89 623,948 $53.38 Awards granted (1) (5) 171,150 $80.15 174,112 $79.65 337,505 $81.87 Awards exercised/vested (2) (3) (4) (1,456,363 ) $42.64 (127,174 ) $60.21 (72,003 ) $57.12 Awards forfeited (9,550 ) $64.53 (5,970 ) $62.11 (2,009 ) $64.39 Awards expired (1,492 ) $39.86 — — — — Conversion of restricted shares — — (1,284 ) — 1,284 — Balance at December 31, 2015 5,734,365 $48.04 522,150 $63.67 888,725 $63.91 Awards granted (1) (5) 154,016 $64.99 154,296 $75.19 289,273 $81.05 Awards exercised/vested (2) (3) (4) (815,044 ) $38.01 (217,805 ) $57.75 (374,217 ) $52.73 Awards forfeited (10,512 ) $63.43 (6,607 ) $70.73 (1,524 ) $86.35 Awards expired (710 ) $68.40 — — — — Special dividend adjustment (6) 960,986 N/A — — — — Balance at December 31, 2016 6,023,101 $42.05 452,034 $70.35 802,257 $75.26 (1) The weighted average grant date fair value for Options granted during the years ended December 31, 2016 , 2015 and 2014 was $11.09 per share, $13.67 per share and $9.21 per share, respectively. (2) The aggregate intrinsic value of options exercised during the years ended December 31, 2016 , 2015 and 2014 was $26.2 million , $52.9 million and $50.8 million , respectively. 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. (3) The fair value of restricted shares vested during the years ended December 31, 2016 , 2015 and 2014 was $15.6 million , $10.2 million and $10.2 million , respectively. (4) The fair value of restricted units vested during the years ended December 31, 2016 , 2015 and 2014 was $27.2 million , $5.8 million and $3.4 million , respectively. (5) Includes performance awards granted under the executive compensation program. (6) In addition to the regular quarterly dividends, the Company paid two special dividends to its shareholders and holders of OP Units of $11.00 per share/unit in the aggregate in 2016. Option holders were not entitled to these special dividends, but pursuant to the terms of the Share Incentive Plans are due equitable adjustments of additional options. The special dividend adjustment's weighted average exercise price per option is reflected in the activity for 2016 for the awards granted, awards exercised/vested, and awards forfeited and the balance at December 31, 2016. The following table summarizes information regarding options outstanding and exercisable at December 31, 2016 : Options Outstanding (1) Options Exercisable (2) Range of Exercise Prices Options Weighted Average Remaining Contractual Life in Years Weighted Average Exercise Price Options Weighted Average Exercise Price $19.67 to $24.93 892,111 2.10 $19.67 892,111 $19.67 $24.94 to $37.39 930,884 2.54 $29.42 930,884 $29.42 $37.40 to $43.62 2,412 3.83 $41.44 2,412 $41.44 $43.63 to $49.86 2,715,880 5.50 $46.59 2,515,401 $46.47 $49.87 to $56.09 1,114,654 5.16 $51.30 1,114,654 $51.30 $56.10 to $62.32 2,761 8.48 $60.80 2,761 $60.80 $62.33 to $68.55 364,399 8.57 $66.77 152,454 67.27 $19.67 to $68.55 6,023,101 4.66 $42.05 5,610,677 $40.91 Vested and expected to vest 6,003,870 4.55 $41.97 (1) The aggregate intrinsic value of options outstanding that are vested and expected to vest as of December 31, 2016 is $135.3 million . (2) The aggregate intrinsic value and weighted average remaining contractual life in years of options exercisable as of December 31, 2016 is $132.0 million and 4.4 years, respectively. Note: The aggregate intrinsic values in Notes (1) and (2) above were both calculated as the excess, if any, between the Company’s closing share price of $64.36 per share on December 31, 2016 and the strike price of the underlying awards. As of December 31, 2015 and 2014 , 4,436,990 Options (with a weighted average exercise price of $45.11 ) and 5,011,784 Options (with a weighted average exercise price of $42.18 ) were exercisable, respectively.

Employee Plans

Employee Plans	12 Months Ended
	Dec. 31, 2016
Employee Plans [Abstract]
Employee Plans	13. 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 2,906,163 Common Shares remained available for purchase at December 31, 2016 . 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 (the net proceeds noted below were contributed to ERPOP in exchange for OP Units): Year Ended December 31, 2016 2015 2014 (Amounts in thousands except share and per share amounts) Shares issued 63,909 68,462 68,807 Issuance price ranges $51.85 – $63.37 $63.70 – $65.90 $45.90 – $55.95 Issuance proceeds $3,686 $4,404 $3,392 The Company established a defined contribution plan (the “401(k) Plan”) to provide retirement benefits for employees that meet minimum employment criteria. Prior to 2014, the Company matched dollar for dollar up to the first 3% of eligible compensation that a participant contributed to the 401(k) Plan. Beginning January 1, 2014, the Company increased its match to 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 remains at 3% . Participants are vested in the Company’s contributions over five years. The Company recognized an expense in the amount of $4.9 million , $5.5 million and $5.2 million for the years ended December 31, 2016 , 2015 and 2014 , 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 sheet, 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 and S

Distribution Reinvestment and Share Purchase Plan	12 Months Ended
	Dec. 31, 2016
Distribution Reinvestment and Share Purchase Plan [Abstract]
Distribution Reinvestment and Share Purchase Plan	14. Distribution Reinvestment Plan On November 18, 2011 , the Company filed with the SEC a Form S-3 Registration Statement to register 4,850,000 Common Shares pursuant to a Distribution Reinvestment and Share Purchase Plan (the "2011 DRIP"), which included the remaining shares available for issuance under a 2008 registration, which terminated as of such date. The registration statement was automatically declared effective the same day and was to expire at the earlier of the date on which all 4,850,000 shares had been issued or November 18, 2014. On September 30, 2014, the Company filed with the SEC a Form S-3 Registration Statement to register 4,790,000 Common Shares under an amended Distribution Reinvestment Plan (the "2014 DRIP"), which included the remaining shares available for issuance under the 2011 DRIP, which terminated as of such date. The registration was automatically declared effective the same day and will expire when all 4,790,000 shares have been issued. The Company has 4,704,608 Common Shares available for issuance under the 2014 DRIP at December 31, 2016 . 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, 2016
Transactions With Related Parties [Abstract]
Related Party Transactions Disclosure [Text Block]	15. Transactions with Related Parties The Company leases its corporate headquarters from an entity controlled by EQR’s Chairman of the Board of Trustees. The lease terminates on January 31, 2022 . Amounts incurred for such office space for the years ended December 31, 2016 , 2015 and 2014 , respectively, were approximately $2.7 million , $2.6 million and $2.5 million . The Company believes these amounts equal market rates for such rental space.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies [Abstract]
Commitments and Contingencies	16. Commitments and Contingencies The Company, as an owner of real estate, is subject to various Federal, state and local 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 on its current properties or on properties that it may acquire in the future. During the year ended December 31, 2016 , the Company recorded an environmental reserve of $4.7 million related to vacant land that it owns adjacent to one of its operating properties. The Company was party to a housing discrimination lawsuit brought by a non-profit civil rights organization in April 2006 in the U.S. District Court for the District of Maryland. The suit alleged that the Company designed and built many of its properties in violation of the accessibility requirements of the Fair Housing Act (“FHA”) and Americans With Disabilities Act (“ADA”). The suit sought actual and punitive damages, injunctive relief (including modification of non-compliant properties), costs and attorneys’ fees. On March 31, 2016, the Court found that certain features at seven of the Company’s properties did not satisfy the accessibility requirements of the FHA. During the fourth quarter of 2016, the Company settled the lawsuit for $3.1 million , net of insurance recoveries already received, which was recorded as other expenses in the consolidated statements of operations and comprehensive income. The Company also agreed to undertake the remediation of certain inaccessible features at a limited number of properties. The Company has established a reserve related to various litigation matters associated with its Massachusetts properties and periodically assesses the adequacy of the reserve and makes adjustments as necessary. During the year ended December 31, 2016 , the Company settled one matter, paying approximately $1.5 million , and recorded a reduction to the reserve of approximately $0.5 million , resulting in a total reserve of approximately $1.0 million at December 31, 2016 . While no assurances can be given, the Company does not believe that the ultimate resolution of any of these remaining litigation matters, if adversely determined, would have a material adverse effect on the Company. The Company does not believe there is any other 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. As of December 31, 2016 , the Company has six wholly owned projects totaling 2,064 apartment units in various stages of development with commitments to fund of approximately $260.6 million and estimated completion dates ranging through December 31, 2018 , as well as other completed development projects that are in various stages of lease up or are stabilized. As of December 31, 2016 , the Company has two completed unconsolidated development properties that are stabilized. Both properties were co-developed with the same third party development partner in different ventures. The development venture agreements with this partner are primarily deal-specific regarding profit-sharing, equity contributions, returns on investment, buy-sell agreements and other customary provisions. The Company currently has no further funding obligations related to these properties. While the Company is the managing member of both of the joint ventures, was responsible for constructing both of the properties and gave certain construction cost overrun guarantees, the joint venture partner has significant participating rights and has active involvement in and oversight of the ongoing operations. The buy-sell arrangements contain provisions that provide the right, but not the obligation, for the Company to acquire the partner’s interests or sell its interests at any time following the occurrence of certain pre-defined events (including at stabilization) described in the development venture agreements. See Note 6 for further discussion. During the years ended December 31, 2016 , 2015 and 2014 , total operating lease expense for ground leases and office space, including a portion of real estate taxes, insurance, repairs and utilities, aggregated $26.2 million , $24.5 million and $21.2 million , respectively. The Company has entered into a retirement benefits agreement with its Chairman of the Board of Trustees and deferred compensation agreements with its Vice Chairman and one former chief executive officer. During the years ended December 31, 2016 , 2015 and 2014 , the Company recognized compensation expense of $0.3 million , $0.4 million and $0.5 million , respectively, related to these agreements. The following table summarizes the Company’s contractual obligations for minimum rent payments under operating leases and deferred compensation for the next five years and thereafter as of December 31, 2016 : (Payments)/Receipts Due by Year (in thousands) 2017 2018 2019 2020 2021 Thereafter Total Operating Leases: Minimum Rent Payments (a) $ (15,917 ) $ (16,027 ) $ (15,890 ) $ (15,489 ) $ (15,256 ) $ (826,259 ) $ (904,838 ) Minimum Rent Receipts (b) 73,171 60,004 54,486 50,705 46,634 211,853 496,853 Other Long-Term Liabilities: Deferred Compensation (c) (1,387 ) (1,723 ) (1,128 ) (1,079 ) (1,079 ) (4,383 ) (10,779 ) (a) Minimum basic rent due for various office space the Company leases and fixed base rent due on ground leases for 11 properties. (b) Minimum basic rent receipts due for various retail/commercial space where the Company is the lessor. (c) Estimated payments to the Company's Chairman, Vice Chairman and one former CEO based on actual and planned retirement dates.

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2016
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Segment Reporting Disclosure [Text Block]	17. 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. The Company’s same store operating segments located in its coastal markets represent its reportable segments. As of January 1, 2016, the Company has revised the presentation of Southern California to show separate results for Los Angeles, San Diego and Orange County, along with a subtotal of the three markets combined, for both the current and comparable periods. The Company's operating segments located in its other markets (Phoenix) that are not material have been included in the tables presented below. See also Note 4 for further discussion of the Starwood Transaction and the operating segments/locations in which properties were sold. The Company’s fee and asset management and 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, 2016 , 2015 or 2014 . 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). As of January 1, 2016, NOI no longer includes an allocation of property management expenses either in the current or comparable periods. 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. The following table presents a reconciliation of NOI from our rental real estate specific to continuing operations for the years ended December 31, 2016 , 2015 and 2014 , respectively (amounts in thousands): Year Ended December 31, 2016 2015 2014 Rental income $ 2,422,233 $ 2,736,578 $ 2,605,311 Property and maintenance expense (406,823 ) (479,160 ) (473,098 ) Real estate taxes and insurance expense (317,387 ) (339,802 ) (325,401 ) Total operating expenses (724,210 ) (818,962 ) (798,499 ) Net operating income $ 1,698,023 $ 1,917,616 $ 1,806,812 The following tables present NOI for each segment from our rental real estate specific to continuing operations for the years ended December 31, 2016 , 2015 and 2014 , respectively, as well as total assets and capital expenditures at December 31, 2016 and 2015 , respectively (amounts in thousands): Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 368,734 $ 107,138 $ 261,596 $ 349,285 $ 104,614 $ 244,671 $ 259,437 $ 81,972 $ 177,465 San Diego 88,049 23,489 64,560 83,491 22,938 60,553 79,217 22,605 56,612 Orange County 79,602 18,931 60,671 75,068 18,550 56,518 71,440 18,211 53,229 Subtotal - Southern California 536,385 149,558 386,827 507,844 146,102 361,742 410,094 122,788 287,306 New York 457,882 160,772 297,110 450,460 152,682 297,778 455,598 156,881 298,717 Washington D.C. 424,055 126,154 297,901 417,985 123,450 294,535 451,973 131,964 320,009 San Francisco 365,019 88,141 276,878 343,089 84,603 258,486 340,252 96,217 244,035 Boston 237,683 66,283 171,400 232,462 67,252 165,210 244,612 70,070 174,542 Seattle 154,482 42,644 111,838 145,646 39,307 106,339 153,197 45,781 107,416 Other Markets 1,798 568 1,230 1,680 528 1,152 385,664 120,395 265,269 Total same store 2,177,304 634,120 1,543,184 2,099,166 613,924 1,485,242 2,441,390 744,096 1,697,294 Non-same store/other (2) (3) Non-same store 163,768 56,403 107,365 72,123 27,078 45,045 83,715 28,992 54,723 Other (3) 81,161 33,687 47,474 565,289 177,960 387,329 80,206 25,411 54,795 Total non-same store/other 244,929 90,090 154,839 637,412 205,038 432,374 163,921 54,403 109,518 Totals $ 2,422,233 $ 724,210 $ 1,698,023 $ 2,736,578 $ 818,962 $ 1,917,616 $ 2,605,311 $ 798,499 $ 1,806,812 (1) For the years ended December 31, 2016 and 2015 , same store primarily includes all properties acquired or completed that are stabilized prior to January 1, 2015 , less properties subsequently sold, which represented 69,879 apartment units. For the year ended December 31, 2014, same store primarily includes all properties acquired or completed that are stabilized prior to January 1, 2014, less properties subsequently sold, which represented 96,286 apartment units. (2) For the years ended December 31, 2016 and 2015, non-same store primarily includes properties acquired after January 1, 2015 , plus any properties in lease-up and not stabilized as of January 1, 2015 . For the year ended December 31, 2014, non-same store primarily includes properties acquired after January 1, 2014, plus any properties in lease-up and not stabilized as of January 1, 2014. (3) Other includes development, other corporate operations and operations prior to sale for properties sold in 2014 through 2016 that do not meet the new discontinued operations criteria. Year Ended December 31, 2016 Year Ended December 31, 2015 Total Assets Capital Expenditures Total Assets Capital Expenditures Same store (1) Los Angeles $ 2,513,979 $ 26,195 $ 2,586,859 $ 22,015 San Diego 471,937 5,172 488,260 4,608 Orange County 260,918 6,747 268,479 7,336 Subtotal - Southern California 3,246,834 38,114 3,343,598 33,959 New York 4,275,930 25,329 4,383,354 18,170 Washington D.C. 3,916,264 33,867 4,023,474 33,455 San Francisco 2,441,256 24,411 2,506,004 25,104 Boston 1,723,942 20,936 1,774,181 17,355 Seattle 1,031,764 13,464 1,061,351 9,106 Other Markets 12,902 67 13,162 182 Total same store 16,648,892 156,188 17,105,124 137,331 Non-same store/other (2) (3) Non-same store 2,864,250 12,179 2,441,637 6,341 Other (3) 1,191,006 3,810 3,563,435 38,441 Total non-same store/other 4,055,256 15,989 6,005,072 44,782 Totals $ 20,704,148 $ 172,177 $ 23,110,196 $ 182,113 (1) Same store primarily includes all properties acquired or completed that are stabilized prior to January 1, 2015 , less properties subsequently sold, which represented 69,879 apartment units. (2) Non-same store primarily includes properties acquired after January 1, 2015 , plus any properties in lease-up and not stabilized as of January 1, 2015 . (3) Other includes development, other corporate operations and capital expenditures for properties sold.

Subsequent Events_Other

Subsequent Events/Other	12 Months Ended
	Dec. 31, 2016
Subsequent Events Other [Abstract]
Subsequent Events/Other	18. Subsequent Events/Other Subsequent Events There have been no material subsequent events occurring since December 31, 2016 . Other During the year ended December 31, 20 14, the Operating Partnership issued the 3.00% Series P Cumulative Redeemable Preference Units with a liquidation value of approximately $18.4 million in conjunction with the buyout of its partner's 95% interest in a previously unconsolidated development property. The Series P Preference Units were classified as a liability due in part to the fact that the holder could put the units back to the Operating Partnership for cash. Dividends wer e paid quarterly on the Series P Preference Units. During the year ended December 31, 2016 , the Company purchased all of the issued and outstanding Series P Preference Units at a par value of $18.4 million and retired these units in conjunction with the purchase. In conjunction with this transaction, the Company reduced other liabilities by $18.4 million . During the year ended December 31, 2016 , the Company sold its entire interest in the management contracts and related rights associated with the military housing ventures at Joint Base Lewis McChord consisting of 5,161 apartment units for approximately $63.3 million and recognized a gain on sale of approximately $52.4 million , which is included in interest and other income in the accompanying consolidated statements of operations and comprehensive income. During the years ended December 31, 2016 , 2015 and 2014 , the Company incurred charges of $1.5 million , $1.0 million and $0.4 million , respectively, related to property acquisition costs, such as survey, title and legal fees, on the acquisition of operating properties and $4.1 million , $3.2 million and $3.6 million , respectively, related to the write-off of various pursuit and out-of-pocket costs for terminated acquisition, disposition and development transactions. These costs, totaling $5.6 million , $4.2 million and $4.0 million , respectively, are included in other expenses in the accompanying consolidated statements of operations and comprehensive income. During the years ended December 31, 2016 , 2015 and 2014 the Company received $3.2 million , $6.0 million and $2.8 million , respectively, for the settlement of various litigation/insurance claims, which are included in interest and other income in the accompanying consolidated statements of operations and comprehensive income.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Quarterly Financial Data (Unaudited)	19. Quarterly Financial Data (Unaudited) Equity Residential The following unaudited quarterly data has been prepared on the basis of a December 31 year-end. Amounts are in thousands, except for per share amounts. First Quarter Second Quarter Third Quarter Fourth Quarter 2016 3/31 6/30 9/30 12/31 Total revenues $ 619,083 $ 595,154 $ 606,074 $ 605,489 Operating income 216,625 206,018 209,373 224,070 Income from continuing operations 3,731,988 228,365 217,246 301,987 Discontinued operations, net (157 ) 35 246 394 Net income * 3,731,831 228,400 217,492 302,381 Net income available to Common Shares 3,586,985 218,067 207,543 276,477 Earnings per share – basic: Net income available to Common Shares $ 9.84 $ 0.60 $ 0.57 $ 0.76 Weighted average Common Shares outstanding 364,592 365,047 365,109 365,256 Earnings per share – diluted: Net income available to Common Shares $ 9.76 $ 0.59 $ 0.56 $ 0.75 Weighted average Common Shares outstanding 382,243 382,065 382,373 381,860 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 3/31 6/30 9/30 12/31 Total revenues $ 666,371 $ 679,112 $ 696,289 $ 703,193 Operating income 218,331 246,255 257,594 287,058 Income from continuing operations 190,069 298,504 205,375 213,673 Discontinued operations, net 155 114 81 47 Net income * 190,224 298,618 205,456 213,720 Net income available to Common Shares 178,842 285,587 195,859 202,989 Earnings per share – basic: Net income available to Common Shares $ 0.49 $ 0.79 $ 0.54 $ 0.56 Weighted average Common Shares outstanding 363,098 363,476 363,579 363,828 Earnings per share – diluted: Net income available to Common Shares $ 0.49 $ 0.78 $ 0.53 $ 0.55 Weighted average Common Shares outstanding 380,327 380,491 380,663 381,220 * The Company did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2016 and 2015 . Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above. ERP Operating Limited Partnership The following unaudited quarterly data has been prepared on the basis of a December 31 year-end. Amounts are in thousands, except for per Unit amounts. First Quarter Second Quarter Third Quarter Fourth Quarter 2016 3/31 6/30 9/30 12/31 Total revenues $ 619,083 $ 595,154 $ 606,074 $ 605,489 Operating income 216,625 206,018 209,373 224,070 Income from continuing operations 3,731,988 228,365 217,246 301,987 Discontinued operations, net (157 ) 35 246 394 Net income * 3,731,831 228,400 217,492 302,381 Net income available to Units 3,730,294 226,847 215,896 287,546 Earnings per Unit – basic: Net income available to Units $ 9.84 $ 0.60 $ 0.57 $ 0.76 Weighted average Units outstanding 378,289 378,934 379,008 379,081 Earnings per Unit – diluted: Net income available to Units $ 9.76 $ 0.59 $ 0.56 $ 0.75 Weighted average Units outstanding 382,243 382,065 382,373 381,860 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 3/31 6/30 9/30 12/31 Total revenues $ 666,371 $ 679,112 $ 696,289 $ 703,193 Operating income 218,331 246,255 257,594 287,058 Income from continuing operations 190,069 298,504 205,375 213,673 Discontinued operations, net 155 114 81 47 Net income * 190,224 298,618 205,456 213,720 Net income available to Units 185,901 296,941 203,637 211,039 Earnings per Unit – basic: Net income available to Units $ 0.49 $ 0.79 $ 0.54 $ 0.56 Weighted average Units outstanding 376,696 377,063 377,147 377,380 Earnings per Unit – diluted: Net income available to Units $ 0.49 $ 0.78 $ 0.53 $ 0.55 Weighted average Units outstanding 380,327 380,491 380,663 381,220 * The Operating Partnership did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2016 and 2015 . Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.

Real Estate and Accumulated Dep

Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2016
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Real Estate and Accumulated Depreciation	EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation Overall Summary December 31, 2016 Properties (H) Apartment Units (H) Investment in Real Estate, Gross Accumulated Depreciation Investment in Real Estate, Net Encumbrances (1) Wholly Owned Unencumbered 204 52,102 $ 18,448,319,778 $ (3,651,990,171 ) $ 14,796,329,607 $ — Wholly Owned Encumbered 79 21,196 6,291,785,512 (1,497,361,379 ) 4,794,424,133 3,818,071,013 Wholly Owned Properties 283 73,298 24,740,105,290 (5,149,351,550 ) 19,590,753,740 3,818,071,013 Partially Owned Unencumbered 9 1,527 288,230,337 (98,826,978 ) 189,403,359 — Partially Owned Encumbered 8 1,688 358,089,848 (112,210,888 ) 245,878,960 301,109,812 Partially Owned Properties 17 3,215 646,320,185 (211,037,866 ) 435,282,319 301,109,812 Total Unencumbered Properties 213 53,629 18,736,550,115 (3,750,817,149 ) 14,985,732,966 — Total Encumbered Properties 87 22,884 6,649,875,360 (1,609,572,267 ) 5,040,303,093 4,119,180,825 Total Consolidated Investment in Real Estate 300 76,513 $ 25,386,425,475 $ (5,360,389,416 ) $ 20,026,036,059 $ 4,119,180,825 (1) See attached Encumbrances Reconciliation. EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation Encumbrances Reconciliation December 31, 2016 Portfolio/Entity Encumbrances Number of Properties Encumbered by See Properties With Note: Amount EQR-Fanwell 2007 LP 4 I $ 299,795,866 EQR-Wellfan 2008 LP (R) 10 J 549,337,934 Archstone Master Property Holdings LLC 13 K 796,845,087 Portfolio/Entity Encumbrances 27 1,645,978,887 Individual Property Encumbrances 2,473,201,938 Total Encumbrances per Financial Statements $ 4,119,180,825 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, 2016 , 2015 and 2014 are as follows: 2016 2015 2014 Balance, beginning of year $ 28,542,697 $ 27,675,383 $ 26,800,948 Acquisitions and development 832,803 964,645 1,121,423 Improvements 174,981 186,104 191,243 Dispositions and other (4,164,056 ) (283,435 ) (438,231 ) Balance, end of year (1) $ 25,386,425 $ 28,542,697 $ 27,675,383 The changes in accumulated depreciation for the years ended December 31, 2016 , 2015 and 2014 are as follows: 2016 2015 2014 Balance, beginning of year $ 6,084,616 $ 5,432,805 $ 4,807,709 Depreciation 705,649 765,895 758,861 Dispositions and other (1,429,876 ) (114,084 ) (133,765 ) Balance, end of year (1) $ 5,360,389 $ 6,084,616 $ 5,432,805 (1) Balances at December 31, 2015 include assets classified as real estate held for sale. EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2016 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/16 Apartment Name Location Retail/Commercial Space Date of Construction Apartment Units (H) Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/16 Encumbrances Wholly Owned Unencumbered: 100 K Street Washington, D.C. — (F) — $ 15,600,000 $ 10,782,320 $ — $ 15,600,000 $ 10,782,320 $ 26,382,320 $ — $ 26,382,320 $ — 140 Riverside Boulevard New York, NY G 2003 354 103,539,100 94,082,725 6,750,405 103,539,100 100,833,130 204,372,230 (41,010,422 ) 163,361,808 — 160 Riverside Boulevard New York, NY G 2001 455 139,933,500 190,964,745 12,780,175 139,933,500 203,744,920 343,678,420 (81,836,307 ) 261,842,113 — 170 Amsterdam New York, NY G 2015 236 — 111,872,438 60,750 — 111,933,188 111,933,188 (7,014,736 ) 104,918,452 — 175 Kent Brooklyn, NY G 2011 113 22,037,831 53,962,169 1,396,338 22,037,831 55,358,507 77,396,338 (12,584,288 ) 64,812,050 — 180 Montague (fka Brooklyn Heights) Brooklyn, NY G 2000 193 32,400,000 92,675,228 2,910,862 32,400,000 95,586,090 127,986,090 (16,638,099 ) 111,347,991 — 180 Riverside Boulevard New York, NY G 1998 516 144,968,250 138,346,681 11,344,206 144,968,250 149,690,887 294,659,137 (61,661,842 ) 232,997,295 — 1111 Belle Pre (fka The Madison) Alexandria, VA G 2014 360 18,937,702 94,758,679 101,850 18,937,702 94,860,529 113,798,231 (12,803,962 ) 100,994,269 — 1210 Mass Washington, D.C. G 2004 144 9,213,513 36,559,189 2,112,056 9,213,513 38,671,245 47,884,758 (15,416,324 ) 32,468,434 — 1401 E. Madison Seattle, WA — (F) — 10,401,958 4,932,954 — 10,401,958 4,932,954 15,334,912 — 15,334,912 — 1500 Mass Ave Washington, D.C. G 1951 556 54,638,298 40,361,702 14,505,801 54,638,298 54,867,503 109,505,801 (21,697,139 ) 87,808,662 — 1800 Oak (fka Rosslyn) Arlington, VA G 2003 314 31,400,000 109,005,734 2,999,587 31,400,000 112,005,321 143,405,321 (19,795,492 ) 123,609,829 — 2201 Pershing Drive Arlington, VA G 2012 188 11,321,198 49,674,175 2,103,036 11,321,198 51,777,211 63,098,409 (9,394,581 ) 53,703,828 — 2201 Wilson Arlington, VA G 2000 219 21,900,000 78,724,663 2,390,730 21,900,000 81,115,393 103,015,393 (13,936,506 ) 89,078,887 — 2400 M St Washington, D.C. G 2006 359 30,006,593 114,013,785 4,082,076 30,006,593 118,095,861 148,102,454 (45,418,266 ) 102,684,188 — 315 on A Boston, MA G 2013 202 14,450,070 115,824,930 517,562 14,450,070 116,342,492 130,792,562 (10,319,919 ) 120,472,643 — 340 Fremont (fka Rincon Hill) San Francisco, CA — 2016 348 42,000,000 244,995,446 88 42,000,000 244,995,534 286,995,534 (4,611,169 ) 282,384,365 — 3003 Van Ness (fka Van Ness) Washington, D.C. — 1970 625 56,300,000 141,191,580 4,018,369 56,300,000 145,209,949 201,509,949 (27,557,126 ) 173,952,823 — 45 Worthington (CityView II) Boston, MA — (F) — — 2,058,673 — — 2,058,673 2,058,673 — 2,058,673 — 420 East 80th Street New York, NY — 1961 155 39,277,000 23,026,984 4,252,598 39,277,000 27,279,582 66,556,582 (12,559,376 ) 53,997,206 — 425 Mass Washington, D.C. G 2009 559 28,150,000 138,600,000 3,740,413 28,150,000 142,340,413 170,490,413 (39,542,039 ) 130,948,374 — 455 Eye Street Washington, D.C. G (F) — 12,762,857 45,794,997 — 12,762,857 45,794,997 58,557,854 — 58,557,854 — 4885 Edgemoor Lane Bethesda, MD — (F) — — 1,237,673 — — 1,237,673 1,237,673 — 1,237,673 — 4th and Hill Los Angeles, CA — (F) — 13,131,456 11,144,682 — 13,131,456 11,144,682 24,276,138 — 24,276,138 — 600 Washington New York, NY G 2004 135 32,852,000 43,140,551 734,411 32,852,000 43,874,962 76,726,962 (17,905,409 ) 58,821,553 — 660 Washington (fka Boston Common) Boston, MA G 2006 420 106,100,000 166,311,679 2,325,428 106,100,000 168,637,107 274,737,107 (29,635,573 ) 245,101,534 — 70 Greene Jersey City, NJ G 2010 480 28,108,899 236,763,553 1,103,051 28,108,899 237,866,604 265,975,503 (57,907,087 ) 208,068,416 — 71 Broadway New York, NY G 1997 238 22,611,600 77,492,171 12,799,538 22,611,600 90,291,709 112,903,309 (39,723,414 ) 73,179,895 — 77 Bluxome San Francisco, CA — 2007 102 5,249,124 18,609,876 264,502 5,249,124 18,874,378 24,123,502 (4,400,965 ) 19,722,537 — 77 Park Avenue (fka Hoboken) Hoboken, NJ G 2000 301 27,900,000 168,992,440 5,319,200 27,900,000 174,311,640 202,211,640 (28,587,488 ) 173,624,152 — 777 Sixth New York, NY G 2002 294 65,352,706 65,747,294 1,975,718 65,352,706 67,723,012 133,075,718 (24,056,905 ) 109,018,813 — 88 Hillside Daly City, CA G 2011 95 7,786,800 31,587,325 1,965,143 7,786,800 33,552,468 41,339,268 (7,400,305 ) 33,938,963 — 855 Brannan San Francisco, CA G (F) — 41,363,921 166,903,627 — 41,363,921 166,903,627 208,267,548 — 208,267,548 — Acton Courtyard Berkeley, CA G 2003 71 5,550,000 15,785,509 199,531 5,550,000 15,985,040 21,535,040 (6,078,896 ) 15,456,144 — Alban Towers Washington, D.C. — 1934 229 18,900,000 89,794,201 1,712,897 18,900,000 91,507,098 110,407,098 (15,639,767 ) 94,767,331 — Altitude (fka Village at Howard Hughes, The (Lots 1 & 2)) Los Angeles, CA — 2016 545 43,783,485 147,918,661 25,744 43,783,485 147,944,405 191,727,890 (2,490,933 ) 189,236,957 — Alton, The (fka Millikan) Irvine, CA — (F) — 11,049,027 90,857,975 — 11,049,027 90,857,975 101,907,002 — 101,907,002 — Arbor Terrace Sunnyvale, CA — 1979 175 9,057,300 18,483,642 4,162,140 9,057,300 22,645,782 31,703,082 (13,943,284 ) 17,759,798 — Artech Building Berkeley, CA G 2002 27 1,642,000 9,152,518 329,292 1,642,000 9,481,810 11,123,810 (3,371,389 ) 7,752,421 — Artisan on Second Los Angeles, CA — 2008 118 8,000,400 36,074,600 670,299 8,000,400 36,744,899 44,745,299 (9,258,909 ) 35,486,390 — Artistry Emeryville (fka Emeryville) Emeryville, CA — 1994 261 12,300,000 61,466,267 2,277,634 12,300,000 63,743,901 76,043,901 (12,191,117 ) 63,852,784 — Atelier Brooklyn, NY — 2015 120 32,401,680 47,135,432 90,854 32,401,680 47,226,286 79,627,966 (3,149,449 ) 76,478,517 — Avenue Two Redwood City, CA — 1972 123 7,995,000 18,005,000 1,749,322 7,995,000 19,754,322 27,749,322 (5,134,751 ) 22,614,571 — Azure (fka Mission Bay-Block 13) San Francisco, CA — 2015 273 32,855,115 152,254,155 26,494 32,855,115 152,280,649 185,135,764 (7,791,579 ) 177,344,185 — Bay Hill Long Beach, CA — 2002 160 7,600,000 27,437,239 2,909,175 7,600,000 30,346,414 37,946,414 (13,103,323 ) 24,843,091 — Beatrice, The New York, NY G 2010 302 114,351,405 165,648,595 1,000,140 114,351,405 166,648,735 281,000,140 (35,148,328 ) 245,851,812 — Belle Arts Condominium Homes, LLC Bellevue, WA — 2000 1 63,158 248,928 (5,320 ) 63,158 243,608 306,766 — 306,766 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2016 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition(Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/16 Apartment Name Location Retail/Commercial Space Date of Construction Apartment Units (H) Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/16 Encumbrances Belle Fontaine Marina Del Rey, CA — 2003 102 9,098,808 28,701,192 683,777 9,098,808 29,384,969 38,483,777 (6,820,566 ) 31,663,211 — Breakwater at Marina Del Rey Marina Del Rey, CA — 1964-1969 224 — 73,189,262 1,050,136 — 74,239,398 74,239,398 (14,067,543 ) 60,171,855 — Briarwood (CA) Sunnyvale, CA — 1985 192 9,991,500 22,247,278 3,599,062 9,991,500 25,846,340 35,837,840 (15,933,244 ) 19,904,596 — Bridford Lakes II Greensboro, NC — (F) — 1,100,564 792,508 — 1,100,564 792,508 1,893,072 — 1,893,072 — Brooklyner, The (fka 111 Lawrence) Brooklyn, NY G 2010 490 40,099,922 221,438,631 1,827,017 40,099,922 223,265,648 263,365,570 (46,337,376 ) 217,028,194 — C on Pico Los Angeles, CA — 2014 94 17,125,766 28,074,234 7,841 17,125,766 28,082,075 45,207,841 (978,707 ) 44,229,134 — Cambridge Park Cambridge, MA G 2002 312 31,200,000 106,048,587 4,107,045 31,200,000 110,155,632 141,355,632 (19,695,291 ) 121,660,341 — Carlyle Mill Alexandria, VA — 2002 317 10,000,000 51,367,913 7,872,672 10,000,000 59,240,585 69,240,585 (28,386,923 ) 40,853,662 — Cascade Seattle, WA G (F) — 23,751,564 99,710,750 — 23,751,564 99,710,750 123,462,314 — 123,462,314 — Centennial (fka Centennial Court & Centennial Tower) Seattle, WA G 1991/2001 408 9,700,000 70,080,378 10,056,055 9,700,000 80,136,433 89,836,433 (33,705,547 ) 56,130,886 — Centre Club Combined Ontario, CA — 1994 & 2002 412 7,436,000 33,014,789 7,413,964 7,436,000 40,428,753 47,864,753 (21,574,006 ) 26,290,747 — Church Corner Cambridge, MA G 1987 85 5,220,000 16,744,643 2,266,923 5,220,000 19,011,566 24,231,566 (8,540,355 ) 15,691,211 — City Gate at Cupertino (fka Cupertino) Cupertino, CA — 1998 311 40,400,000 95,937,046 5,626,705 40,400,000 101,563,751 141,963,751 (17,548,498 ) 124,415,253 — City Pointe Fullerton, CA G 2004 183 6,863,792 36,476,208 857,946 6,863,792 37,334,154 44,197,946 (11,712,818 ) 32,485,128 — City Square Bellevue (fka Bellevue) Bellevue, WA G 1998 191 15,100,000 41,876,257 3,126,524 15,100,000 45,002,781 60,102,781 (7,953,824 ) 52,148,957 — CityView at Longwood Boston, MA G 1970 295 14,704,898 79,195,102 10,574,412 14,704,898 89,769,514 104,474,412 (25,961,856 ) 78,512,556 — Clarendon, The Arlington, VA G 2005 292 30,400,340 103,824,660 2,143,113 30,400,340 105,967,773 136,368,113 (26,624,877 ) 109,743,236 — Cleo, The Los Angeles, CA — 1989 92 6,615,467 14,829,335 3,832,717 6,615,467 18,662,052 25,277,519 (8,171,402 ) 17,106,117 — Connecticut Heights Washington, D.C. — 1974 518 27,600,000 114,002,295 4,856,602 27,600,000 118,858,897 146,458,897 (20,124,977 ) 126,333,920 — Corcoran House at DuPont Circle (fka DuPont Circle) Washington, D.C. G 1961 138 13,500,000 26,913,113 1,796,515 13,500,000 28,709,628 42,209,628 (5,801,661 ) 36,407,967 — Courthouse Plaza Arlington, VA G 1990 396 — 87,386,024 4,635,703 — 92,021,727 92,021,727 (17,966,254 ) 74,055,473 — Creekside (San Mateo) San Mateo, CA — 1985 192 9,606,600 21,193,231 4,013,129 9,606,600 25,206,360 34,812,960 (15,771,922 ) 19,041,038 — Cronins Landing Waltham, MA G 1998 281 32,300,000 85,119,324 3,914,279 32,300,000 89,033,603 121,333,603 (15,979,321 ) 105,354,282 — Crystal Place Arlington, VA — 1986 181 17,200,000 47,918,975 3,157,515 17,200,000 51,076,490 68,276,490 (9,260,208 ) 59,016,282 — Eagle Canyon Chino Hills, CA — 1985 252 1,808,900 16,274,361 8,800,432 1,808,900 25,074,793 26,883,693 (17,314,590 ) 9,569,103 — Edgemont at Bethesda Metro Bethesda, MD — 1989 122 13,092,552 43,907,448 1,125,457 13,092,552 45,032,905 58,125,457 (10,423,583 ) 47,701,874 — Elevé Glendale, CA G 2013 208 14,080,560 56,419,440 415,204 14,080,560 56,834,644 70,915,204 (7,584,216 ) 63,330,988 — Emerson Place Boston, MA G 1962 444 14,855,000 57,566,636 22,690,975 14,855,000 80,257,611 95,112,611 (52,167,424 ) 42,945,187 — Encinitas Heights (fka Encinitas) Encinitas, CA G 2002 120 12,000,000 29,207,497 617,199 12,000,000 29,824,696 41,824,696 (5,889,783 ) 35,934,913 — Encore at Sherman Oaks, The Sherman Oaks, CA — 1988 174 8,700,000 25,446,003 1,211,820 8,700,000 26,657,823 35,357,823 (7,869,084 ) 27,488,739 — Fountains at Emerald Park (fka Emerald Park) Dublin, CA — 2000 324 25,900,000 83,986,217 927,144 25,900,000 84,913,361 110,813,361 (15,751,998 ) 95,061,363 — Fremont Center Fremont, CA G 2002 322 25,800,000 78,753,114 2,733,097 25,800,000 81,486,211 107,286,211 (14,742,488 ) 92,543,723 — Gallery, The Hermosa Beach, CA — 1971 169 18,144,000 46,567,941 2,651,435 18,144,000 49,219,376 67,363,376 (19,871,531 ) 47,491,845 — Garden Garage Boston, MA — (F) — — 4,917,373 — — 4,917,373 4,917,373 — 4,917,373 — Gateway at Malden Center Malden, MA G 1988 203 9,209,780 25,722,666 13,834,746 9,209,780 39,557,412 48,767,192 (21,301,983 ) 27,465,209 — Geary Court Yard San Francisco, CA — 1990 164 1,722,400 15,471,429 4,477,710 1,722,400 19,949,139 21,671,539 (12,574,169 ) 9,097,370 — Glen Meadow Franklin, MA — 1971 288 2,339,331 16,133,588 4,347,422 2,339,331 20,481,010 22,820,341 (12,813,162 ) 10,007,179 — Hampshire Place Los Angeles, CA — 1989 259 10,806,000 30,335,330 4,042,761 10,806,000 34,378,091 45,184,091 (15,493,262 ) 29,690,829 — Harbor Steps Seattle, WA G 2000 758 59,387,158 158,829,432 20,957,019 59,387,158 179,786,451 239,173,609 (73,216,856 ) 165,956,753 — Helios (fka 2nd & Pine) Seattle, WA G (F) — 18,061,674 162,443,822 — 18,061,674 162,443,822 180,505,496 — 180,505,496 — Heritage at Stone Ridge Burlington, MA — 2005 180 10,800,000 31,808,335 1,839,852 10,800,000 33,648,187 44,448,187 (14,133,220 ) 30,314,967 — Heritage Ridge Lynwood, WA — 1999 197 6,895,000 18,983,597 1,741,466 6,895,000 20,725,063 27,620,063 (9,305,589 ) 18,314,474 — Hesby North Hollywood, CA — 2013 308 23,299,892 102,700,108 323,337 23,299,892 103,023,445 126,323,337 (13,208,612 ) 113,114,725 — Highlands at Cherry Hill Cherry Hills, NJ — 2002 170 6,800,000 21,459,108 1,219,837 6,800,000 22,678,945 29,478,945 (9,622,596 ) 19,856,349 — Highlands at South Plainfield South Plainfield, NJ — 2000 252 10,080,000 37,526,912 1,671,208 10,080,000 39,198,120 49,278,120 (15,870,459 ) 33,407,661 — Hikari Los Angeles, CA G 2007 128 9,435,760 32,564,240 623,527 9,435,760 33,187,767 42,623,527 (8,254,511 ) 34,369,016 — Hudson Crossing New York, NY G 2003 259 23,420,000 69,977,699 2,182,860 23,420,000 72,160,559 95,580,559 (30,934,660 ) 64,645,899 — Hudson Crossing II New York, NY — (F) — 10,599,287 3,293,787 — 10,599,287 3,293,787 13,893,074 — 13,893,074 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2016 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition (Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/16 Apartment Name Location Retail/Commercial Space Date of Construction Apartment Units (H) Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/16 Encumbrances Hudson Pointe Jersey City, NJ — 2003 182 5,350,000 41,114,074 4,844,133 5,350,000 45,958,207 51,308,207 (20,241,451 ) 31,066,756 — Hunt Club II Charlotte, NC — (F) — 100,000 — — 100,000 — 100,000 — 100,000 — Ivory Wood Bothell, WA — 2000 144 2,732,800 13,888,282 992,859 2,732,800 14,881,141 17,613,941 (6,865,471 ) 10,748,470 — Jia (fka Chinatown Gateway) Los Angeles, CA G 2014 280 14,791,831 76,417,368 160,373 14,791,831 76,577,741 91,369,572 (11,450,392 ) 79,919,180 — Junction 47 (fka West Seattle) Seattle, WA G 2015 206 11,726,305 55,592,607 10,285 11,726,305 55,602,892 67,329,197 (2,870,469 ) 64,458,728 — Kelvin, The (fka Modera) Irvine, CA — 2015 194 15,521,552 64,853,448 140,201 15,521,552 64,993,649 80,515,201 (5,226,037 ) 75,289,164 — Kendall Square II Cambridge, MA — (F) — — 2,361,587 — — 2,361,587 2,361,587 — 2,361,587 — Landings at Port Imperial W. New York, NJ — 1999 276 27,246,045 37,741,050 8,727,114 27,246,045 46,468,164 73,714,209 (27,123,316 ) 46,590,893 — Lincoln Heights Quincy, MA — 1991 336 5,928,400 33,595,262 12,900,751 5,928,400 46,496,013 52,424,413 (32,166,271 ) 20,258,142 — Lindley Apartments Encino, CA — 2004 129 5,805,000 25,705,000 927,140 5,805,000 26,632,140 32,437,140 (7,515,112 ) 24,922,028 — Lofts 590 Arlington, VA — 2005 212 20,100,000 67,909,023 593,626 20,100,000 68,502,649 88,602,649 (11,467,543 ) 77,135,106 — Lofts at Kendall Square (fka Kendall Square) Cambridge, MA — 1998 186 23,300,000 78,445,657 4,430,000 23,300,000 82,875,657 106,175,657 (14,293,167 ) 91,882,490 — Longacre House New York, NY G 2000 293 73,170,045 53,962,510 1,952,072 73,170,045 55,914,582 129,084,627 (20,862,433 ) 108,222,194 — Longfellow Place Boston, MA G 1975 710 47,096,917 150,143,916 77,175,848 47,096,917 227,319,764 274,416,681 (140,185,560 ) 134,231,121 — Mantena New York, NY G 2012 98 22,346,513 61,501,158 726,983 22,346,513 62,228,141 84,574,654 (11,547,865 ) 73,026,789 — Marina 41 (fka Marina Del Rey) Marina Del Rey, CA — 1973 623 — 168,842,442 5,590,178 — 174,432,620 174,432,620 (34,075,934 ) 140,356,686 — Mariposa at Playa Del Rey (fka Playa Del Rey) Playa Del Rey, CA — 2004 354 60,900,000 89,311,482 4,874,252 60,900,000 94,185,734 155,085,734 (17,348,528 ) 137,737,206 — Milano Lofts Los Angeles, CA G 1925/2006 99 8,125,216 27,378,784 419,390 8,125,216 27,798,174 35,923,390 (5,879,972 ) 30,043,418 — Mountain View Redevelopment Mountain View, CA — (F) — — 11,539 — — 11,539 11,539 — 11,539 — Mozaic at Union Station Los Angeles, CA — 2007 272 8,500,000 52,529,446 1,742,611 8,500,000 54,272,057 62,772,057 (20,324,720 ) 42,447,337 — Murray Hill Tower (fka Murray Hill) New York, NY G 1974 270 75,800,000 102,705,401 5,632,060 75,800,000 108,337,461 184,137,461 (21,534,636 ) 162,602,825 — Northglen Valencia, CA — 1988 234 9,360,000 20,778,553 3,216,250 9,360,000 23,994,803 33,354,803 (13,232,302 ) 20,122,501 — Northpark Burlingame, CA — 1972 510 38,607,000 77,472,217 12,538,178 38,607,000 90,010,395 128,617,395 (29,143,721 ) 99,473,674 — Northridge Pleasant Hill, CA — 1974 221 5,524,000 14,691,705 10,511,874 5,524,000 25,203,579 30,727,579 (17,391,149 ) 13,336,430 — Oak Park Combined Agoura Hills, CA — 1989 & 1990 444 3,390,700 30,517,274 9,746,651 3,390,700 40,263,925 43,654,625 (28,656,591 ) 14,998,034 — Oakwood Boston Boston, MA G 1901 94 22,200,000 28,672,979 1,529,010 22,200,000 30,201,989 52,401,989 (5,884,677 ) 46,517,312 — Oakwood Crystal City Arlington, VA — 1987 162 15,400,000 35,474,336 2,425,184 15,400,000 37,899,520 53,299,520 (6,786,525 ) 46,512,995 — Oakwood Marina Del Rey Marina Del Rey, CA — 1969 597 — 120,795,359 2,437,138 — 123,232,497 123,232,497 (24,113,286 ) 99,119,211 — Oaks Santa Clarita, CA — 2000 520 23,400,000 61,020,438 5,042,217 23,400,000 66,062,655 89,462,655 (31,804,000 ) 57,658,655 — Ocean Crest Solana Beach, CA — 1986 146 5,111,200 11,910,438 3,961,557 5,111,200 15,871,995 20,983,195 (9,843,174 ) 11,140,021 — Odin (fka Tallman) Seattle, WA — 2015 301 16,807,519 63,703,105 4,853 16,807,519 63,707,958 80,515,477 (3,220,384 ) 77,295,093 — Old Town Lofts Redmond, WA G 2014 149 7,740,467 44,146,181 615,810 7,740,467 44,761,991 52,502,458 (3,368,591 ) 49,133,867 — One Henry Adams San Francisco, CA G 2016 241 30,224,393 132,422,943 — 30,224,393 132,422,943 162,647,336 — 162,647,336 — Pacific Place Los Angeles, CA — 2008 430 32,250,000 110,750,000 1,114,418 32,250,000 111,864,418 144,114,418 (18,609,682 ) 125,504,736 — Packard Building Seattle, WA G 2010 61 5,911,041 19,954,959 25,690 5,911,041 19,980,649 25,891,690 (1,315,590 ) 24,576,100 — Parc 77 New York, NY G 1903 137 40,504,000 18,025,679 5,639,147 40,504,000 23,664,826 64,168,826 (11,317,834 ) 52,850,992 — Parc Cameron New York, NY G 1927 166 37,600,000 9,855,597 6,917,858 37,600,000 16,773,455 54,373,455 (9,519,277 ) 44,854,178 — Parc Coliseum New York, NY G 1910 177 52,654,000 23,045,751 8,635,413 52,654,000 31,681,164 84,335,164 (15,575,683 ) 68,759,481 — Parc East Towers New York, NY G 1977 324 102,163,000 108,989,402 8,841,139 102,163,000 117,830,541 219,993,541 (44,109,145 ) 175,884,396 — Parc on Powell (fka Parkside at Emeryville) Emeryville, CA G 2015 173 16,667,059 67,690,072 48,612 16,667,059 67,738,684 84,405,743 (4,037,098 ) 80,368,645 — Park at Pentagon Row (fka Pentagon City) Arlington, VA G 1990 298 28,300,000 78,838,184 1,353,525 28,300,000 80,191,709 108,491,709 (14,341,704 ) 94,150,005 — Park Connecticut Washington, D.C. — 2000 142 13,700,000 59,087,519 1,138,671 13,700,000 60,226,190 73,926,190 (10,132,810 ) 63,793,380 — Park Hacienda (fka Hacienda) Pleasanton, CA — 2000 540 43,200,000 128,753,359 1,303,861 43,200,000 130,057,220 173,257,220 (24,868,371 ) 148,388,849 — Park West (CA) Los Angeles, CA — 1987/1990 444 3,033,500 27,302,383 9,833,303 3,033,500 37,135,686 40,169,186 (26,282,067 ) 13,887,119 — Parkside Union City, CA — 1979 208 6,246,700 11,827,453 4,057,554 6,246,700 15,885,007 22,131,707 (11,039,298 ) 11,092,409 — Pearl, The Seattle, WA G 2008 80 6,972,585 26,527,415 86,236 6,972,585 26,613,651 33,586,236 (1,802,018 ) 31,784,218 — Pegasus Los Angeles, CA G 1949/2003 322 18,094,052 81,905,948 4,353,371 18,094,052 86,259,319 104,353,371 (23,034,817 ) 81,318,554 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2016 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition(Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/16 Apartment Name Location Retail/Commercial Space Date of Construction Apartment Units (H) Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/16 Encumbrances Playa Pacifica Hermosa Beach, CA — 1972 285 35,100,000 33,473,822 21,252,912 35,100,000 54,726,734 89,826,734 (22,557,639 ) 67,269,095 — Portofino Chino Hills, CA — 1989 176 3,572,400 14,660,994 3,619,935 3,572,400 18,280,929 21,853,329 (12,064,192 ) 9,789,137 — Portofino (Val) Valencia, CA — 1989 216 8,640,000 21,487,126 4,531,435 8,640,000 26,018,561 34,658,561 (14,294,138 ) 20,364,423 — Portside Towers Jersey City, NJ G 1992-1997 527 22,487,006 96,842,913 20,261,246 22,487,006 117,104,159 139,591,165 (75,662,868 ) 63,928,297 — Potrero 1010 San Francisco, CA G 2016 453 40,830,011 178,838,375 2,685 40,830,011 178,841,060 219,671,071 (4,297,727 ) 215,373,344 — Prado (fka Glendale) Glendale, CA — 1988 264 — 67,977,313 2,474,023 — 70,451,336 70,451,336 (12,649,164 ) 57,802,172 — Prime, The Arlington, VA — 2002 256 32,000,000 64,436,539 1,366,624 32,000,000 65,803,163 97,803,163 (25,533,405 ) 72,269,758 — Prism at Park Avenue South (fka 400 Park Avenue South) New York, NY G 2015 269 76,292,169 171,532,416 40,159 76,292,169 171,572,575 247,864,744 (12,053,844 ) 235,810,900 — Promenade at Town Center I & II Valencia, CA — 2001 564 28,200,000 69,795,915 6,603,855 28,200,000 76,399,770 104,599,770 (35,742,052 ) 68,857,718 — Quarry Hills Quincy, MA — 2006 316 26,900,000 84,411,162 1,276,264 26,900,000 85,687,426 112,587,426 (15,916,309 ) 96,671,117 — Red 160 (fka Redmond Way) Redmond, WA G 2011 250 15,546,376 65,320,010 1,069,525 15,546,376 66,389,535 81,935,911 (13,743,779 ) 68,192,132 — Redmond Court Bellevue, WA — 1977 206 10,300,000 33,488,745 828,734 10,300,000 34,317,479 44,617,479 (6,900,171 ) 37,717,308 — Regency Palms Huntington Beach, CA — 1969 310 1,857,400 16,713,254 5,843,205 1,857,400 22,556,459 24,413,859 (16,685,572 ) 7,728,287 — Renaissance Villas Berkeley, CA G 1998 34 2,458,000 4,542,000 157,541 2,458,000 4,699,541 7,157,541 (1,716,722 ) 5,440,819 — Reserve at Mountain View (fka Mountain View) Mountain View, CA — 1965 180 27,000,000 33,029,605 3,985,141 27,000,000 37,014,746 64,014,746 (7,098,473 ) 56,916,273 — Reserve at Potomac Yard Alexandria, VA — 2002 588 11,918,917 68,862,641 10,012,055 11,918,917 78,874,696 90,793,613 (34,843,070 ) 55,950,543 — Reserve at Town Center I-III (WA) Mill Creek, WA G 2001, 2009, 2014 584 16,769,205 77,511,523 2,904,720 16,769,205 80,416,243 97,185,448 (27,282,993 ) 69,902,455 — Residences at Westgate I (fka Westgate II) Pasadena, CA G 2014 252 17,859,785 108,596,287 152,142 17,859,785 108,748,429 126,608,214 (11,706,631 ) 114,901,583 — Residences at Westgate II (fka Westgate III) Pasadena, CA G 2015 88 12,118,248 40,458,283 28,122 12,118,248 40,486,405 52,604,653 (2,670,021 ) 49,934,632 — Rianna I Seattle, WA G 2000 78 2,268,160 14,864,482 570,971 2,268,160 15,435,453 17,703,613 (4,912,805 ) 12,790,808 — Ridgewood Village I&II San Diego, CA — 1997 408 11,809,500 34,004,048 5,443,381 11,809,500 39,447,429 51,256,929 (23,108,949 ) 28,147,980 — Riva Terra I (fka Redwood Shores) Redwood City, CA — 1986 304 34,963,355 84,587,658 1,530,506 34,963,355 86,118,164 121,081,519 (16,714,984 ) 104,366,535 — Riva Terra II (fka Harborside) Redwood City, CA — 1986 149 17,136,645 40,536,531 1,833,334 17,136,645 42,369,865 59,506,510 (7,532,830 ) 51,973,680 — Riverpark Redmond, WA G 2009 319 14,355,000 80,894,049 1,100,173 14,355,000 81,994,222 96,349,222 (18,616,561 ) 77,732,661 — Rolling Green (Milford) Milford, MA — 1970 304 2,012,350 13,452,150 7,325,804 2,012,350 20,777,954 22,790,304 (12,541,523 ) 10,248,781 — Rosecliff II Quincy, MA — 2005 130 4,922,840 30,202,160 873,630 4,922,840 31,075,790 35,998,630 (7,963,684 ) 28,034,946 — Sakura Crossing Los Angeles, CA G 2009 230 14,641,990 42,858,010 703,088 14,641,990 43,561,098 58,203,088 (11,836,842 ) 46,366,246 — Seventh & James Seattle, WA — 1992 96 663,800 5,974,803 3,798,267 663,800 9,773,070 10,436,870 (7,029,871 ) 3,406,999 — Sheffield Court Arlington, VA — 1986 597 3,342,381 31,337,332 14,316,432 3,342,381 45,653,764 48,996,145 (33,910,069 ) 15,086,076 — Skycrest Valencia, CA — 1999 264 10,560,000 25,574,457 3,079,215 10,560,000 28,653,672 39,213,672 (16,045,953 ) 23,167,719 — Skylark Union City, CA — 1986 174 1,781,600 16,731,916 4,194,009 1,781,600 20,925,925 22,707,525 (12,497,731 ) 10,209,794 — Skyline Terrace Burlingame, CA — 1967 & 1987 138 16,836,000 35,414,000 4,638,329 16,836,000 40,052,329 56,888,329 (11,663,739 ) 45,224,590 — Skyline Towers Falls Church, VA G 1971 939 78,278,200 91,485,591 39,225,721 78,278,200 130,711,312 208,989,512 (66,807,948 ) 142,181,564 — SoMa II San Francisco, CA — (F) — 29,406,606 3,589,891 — 29,406,606 3,589,891 32,996,497 — 32,996,497 — Sonterra at Foothill Ranch Foothill Ranch, CA — 1997 300 7,503,400 24,048,507 4,962,421 7,503,400 29,010,928 36,514,328 (17,403,278 ) 19,111,050 — South City Station (fka South San Francisco) San Francisco, CA G 2007 360 68,900,000 79,476,861 2,331,779 68,900,000 81,808,640 150,708,640 (15,596,819 ) 135,111,821 — Southwood Palo Alto, CA — 1985 100 6,936,600 14,324,069 3,202,676 6,936,600 17,526,745 24,463,345 (11,356,629 ) 13,106,716 — Springbrook Estates Riverside, CA — (F) — 18,200,000 — — 18,200,000 — 18,200,000 — 18,200,000 — Summerset Village II Chatsworth, CA — (F) — 260,646 — — 260,646 — 260,646 — 260,646 — Summit at Sausalito (fka Sausalito) Sausalito, CA — 1978 198 26,000,000 28,435,024 3,586,242 26,000,000 32,021,266 58,021,266 (7,628,434 ) 50,392,832 — Ten23 (fka 500 West 23rd Street) New York, NY G 2011 111 — 58,881,873 165,340 — 59,047,213 59,047,213 (10,287,817 ) 48,759,396 — Terraces, The San Francisco, CA G 1975 117 14,087,610 16,314,151 982,446 14,087,610 17,296,597 31,384,207 (5,171,269 ) 26,212,938 — Third Square Cambridge, MA G 2008/2009 471 26,767,171 218,822,728 5,396,605 26,767,171 224,219,333 250,986,504 (62,174,271 ) 188,812,233 — Three20 Seattle, WA G 2013 134 7,030,766 29,005,762 703,110 7,030,766 29,708,872 36,739,638 (4,264,421 ) 32,475,217 — Town Center South Commercial Tract St. Charles, MD — (F) — 1,500,000 9,394 — 1,500,000 9,394 1,509,394 — 1,509,394 — EQUITY RESIDENTIAL ERP OPERATING LIMITED PARTNERSHIP Schedule III - Real Estate and Accumulated Depreciation December 31, 2016 Description Initial Cost to Company Cost Capitalized Subsequent to Acquisition(Improvements, net) (E) Gross Amount Carried at Close of Period 12/31/16 Apartment Name Location Retail/Commercial Space Date of Construction Apartment Units (H) Land Building & Fixtures Building & Fixtures Land Building & Fixtures (A) Total (B) Accumulated Depreciation (C) Investment in Real Estate, Net at 12/31/16 Encumbrances Town Square at Mark Center II Alexandria, VA — 2001 272 15,568,464 55,029,607 2,117,754 15,568,464 57,147,361 72,715,825 (17,050,654 ) 55,665,171 — Urbana (fka Market Street Landing) Seattle, WA G 2014 287 12,542,418 75,766,505 283,439 12,542,418 76,049,944 88,592,362 (10,215,162 ) 78,377,200 — Uwajimaya Village Seattle, WA — 2002 176 8,800,000 22,188,288 724,720 8,800,000 22,913,008 31,713,008 (10,116,792 ) 21,596,216 — Vantage Pointe San Diego, CA G 2009 679 9,403,960 190,596,040 8,156,057 9,403,960 198,752,097 208,156,057 (52,465,809 ) 155,690,248 — Veloce Redmond, WA G 2009 322 15,322,724 76,176,594 750,251 15,322,724 76,926,845 92,249,569 (14,412,958 ) 77,836,611 — Verde Condominium Homes (fka Mission Verde, LLC) San Jose, CA — 1986 108 5,190,700 9,679,109 4,206,652 5,190,700 13,885,761 19,076,461 (9,342,080 ) 9,734,381 — Veridian (fka Silver Spring) Silver Spring, MD G 2009 457 18,539,817 130,407,365 1,921,459 18,539,817 132,328,824 150,868,641 (34,495,297 ) 116,373,344 — Villa Solana Laguna Hills, CA — 1984 272 1,665,100 14,985,678 9,397,116 1,665,100 24,382,794 26,047,894 (18,569,428 ) 7,478,466 — Village at Del Mar Heights, The (fka Del Mar Heights) San Diego, CA — 1986 168 15,100,000 40,859,396 814,553 15,100,000 41,673,949 56,773,949 (7,931,652 ) 48,842,297 — Virginia Square Arlington, VA G 2002 231 — 85,940,003 2,598,732 — 88,538,735 88,538,735 (15,463,270 ) 73,075,465 — Vista 99 (fka Tasman) San Jose, CA — 2016 554 27,709,329 175,174,600 15,853 27,709,329 175,190,453 202,899,782 (5,630,074 ) 197,269,708 — Vista Del Lago Mission Viejo, CA — 1986-1988 608 4,525,800 40,736,293 16,333,057 4,525,800 57,069,350 61,595,150 (43,829,076 ) 17,766,074 — Vista on Courthouse Arlington, VA — 2008 220 15,550,260 69,449,740 1,412,841 15,550,260 70,862,581 86,412,841 (21,083,205 ) 65,329,636 — Walden Park Cambridge, MA — 1966 232 12,448,888 52,044,448 4,033,426 12,448,888 56,077,874 68,526,762 (15,551,486 ) 52,975,276 — Water Park Towers Arlington, VA — 1989 362 34,400,000 108,485,859 6,380,938 34,400,000 114,866,797 149,266,797 (20,648,479 ) 128,618,318 — Watertown Square Watertown, MA G 2005 134 16,800,000 34,074,056 1,145,350 16,800,000 35,219,406 52,019,406 (6,303,140 ) 45,716,266 — West 96th New York, NY G 1987 207 84,800,000 67,055,502 4,128,963 84,800,000 71,184,465 155,984,465 (15,247,357 ) 140,737,108 — West End Apartments (fka Emerson Place/CRP II) Boston, MA G 2008 310 469,546 163,123,022 2,430,837 469,546 165,553,859 166,023,405 (50,041,771 ) 115,981,634 — W

Summary of Significant Accoun33

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
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 two unconsolidated operating properties.
Real Estate Assets And Depreciation Of Investment In Real Estate	Real Estate Assets and Depreciation of Investment in Real Estate An acquiring entity is required to recognize all assets acquired and liabilities assumed in a transaction at the acquisition-date fair value with limited exceptions. In addition, an acquiring entity is required to expense acquisition-related costs as incurred, value noncontrolling interests at fair value at the acquisition date and expense restructuring costs associated with an acquired business. The Company allocates the purchase price of properties to net tangible and identified intangible assets acquired based on their fair values. In making estimates of 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 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 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 fair value (as necessary) if acquired separately or market research/comparables if acquired with an operating property. • Furniture, Fixtures and Equipment – Ranges between $10,000 and $25,000 per apartment unit acquired as an estimate of the 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 building 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 retail leases' term at acquisition approximates the average remaining term of all acquired retail leases. See Note 4 for more information on above and below market 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 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. • Site Improvements – Based on replacement cost, which approximates fair value. Depreciation is calculated on the straight-line method over an estimated useful life of eight years. • Long-Term Debt – The Company calculates the 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 sales or dispositions are recorded when title 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 (see below and Note 4 for further discussion). 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 The Company periodically evaluates its long-lived assets, including its investments 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 and legal and environmental concerns, as well as the Company’s ability to hold and its intent with regard to each asset. Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted. If impairment indicators exist, the Company performs the following: ▪ For long-lived 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 record an impairment loss for the difference between the estimated fair value and the carrying amount of the asset. ▪ 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.
Cost Capitalization	Cost Capitalization See the Real Estate Assets and Depreciation of Investment in Real Estate section for a discussion of the Company’s policy with respect to capitalization vs. expensing of fixed asset/repair and maintenance costs. In addition, the Company capitalizes an allocation of the payroll and associated costs of employees directly responsible for and who spend their time on the execution and supervision of major capital and/or renovation projects. These costs are reflected on the balance sheets as increases to depreciable property. For all development projects, the Company uses its professional judgment in determining whether such costs meet the criteria for capitalization or must be expensed as incurred. The Company capitalizes interest, real estate taxes and insurance and payroll and associated costs for those individuals directly responsible for and who spend their time on development activities, with capitalization ceasing no later than 90 days following issuance of the certificate of occupancy. These costs are reflected on the balance sheets as construction-in-progress for each specific property. The Company expenses as incurred all payroll costs of on-site employees working directly at our properties, except as noted above on our development properties prior to certificate of occupancy issuance and on specific major renovations at selected properties when additional incremental employees are hired. During the years ended December 31, 2016 , 2015 and 2014 , the Company capitalized $18.7 million , $22.3 million and $22.4 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 and repurchase agreements purchased 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 Depository 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.
Investment Securities	Investment Securities Investment securities are included in other assets in the consolidated balance sheets. These securities are classified as held-to-maturity and carried at amortized cost if management has the positive intent and ability to hold the securities to maturity. Otherwise, the securities are classified as available-for-sale and carried at estimated fair value with unrealized gains and losses included in accumulated other comprehensive (loss), a separate component of shareholders’ equity/partners' capital. As of December 31, 2016 and 2015 , the Company did not hold any investment securities.
Fair Value of Financial Instruments, Including Derivative Instruments	Fair Value of Financial Instruments, Including Derivative 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, including its derivative 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 seeks 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 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 from the use of derivatives it currently has in place. 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.
Revenue Recognition	Revenue Recognition Rental income attributable to residential leases is recorded on a straight-line basis, 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 retail/commercial leases is also recorded on a straight-line basis. Retail/commercial 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.
Share-Based Compensation	Share-Based Compensation The Company expenses share-based compensation such as 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. The fair value of the option grants are recognized over the requisite service/vesting period of the options. The fair value for the Company's share options was estimated at the time the share options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions: 2016 2015 2014 Expected volatility (1) 26.3% 26.6% 27.0% Expected life (2) 5 years 5 years 5 years Expected dividend yield (3) 3.04% 3.13% 3.78% Risk-free interest rate (4) 1.27% 1.29% 1.50% Option valuation per share $13.02 $13.68 $9.12 (1) Expected volatility – Estimated based on the historical ten-year volatility of EQR’s share price measured on a monthly basis. (2) Expected life – Approximates the actual weighted average life of all share 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 prior to the grant date for a period matching the expected life of each grant. 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 share 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.
Income and Other Taxes	Income and Other Taxes Due to the structure of EQR as a REIT and the nature of the operations of its operating properties, no provision for federal income taxes has been made at the EQR level. In addition, ERPOP generally is not liable for federal income taxes as the partners recognize their proportionate 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. Deferred tax assets and liabilities applicable to the TRS are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. These assets and liabilities are measured using enacted tax rates for which the temporary differences are expected to be recovered or settled. The effects of changes in tax rates on deferred tax assets and liabilities are recognized in earnings in the period enacted. The Company’s deferred tax assets are generally the result of tax affected suspended interest deductions, net operating losses, differing depreciable lives on capitalized assets and the timing of expense recognition for certain accrued liabilities. As of December 31, 2016 , the Company has recorded a deferred tax asset of approximately $38.7 million , which is fully offset by a valuation allowance due to the uncertainty of realization. The company currently anticipates electing REIT status in the third quarter of 2017 for its primary TRS, retroactive to January 1, 2016. The Company provided for income, franchise and excise taxes allocated as follows in the consolidated statements of operations and comprehensive income for the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 2015 2014 Income and other tax expense (benefit) (1) $ 1,613 $ 917 $ 1,394 Discontinued operations, net (2) 12 15 8 Provision for income, franchise and excise taxes (3) $ 1,625 $ 932 $ 1,402 (1) Primarily includes state and local income, excise and franchise taxes. (2) Primarily represents state and local income, excise and franchise taxes on operating properties sold prior to January 1, 2014 and included in discontinued operations. The amounts included in discontinued operations for the years ending December 31, 2016, 2015 and 2014 represent trailing activity for properties sold in 2013 and prior years. None of the properties sold during the years ended December 31, 2016, 2015 and 2014 met the new criteria for reporting discontinued operations. (3) All provisions for income tax amounts are current and none are deferred. The Company’s TRSs have approximately $16.4 million of net operating loss ("NOL") carryforwards available as of January 1, 2017 that will expire between 2030 and 2032 . During the years ended December 31, 2016 , 2015 and 2014 , the Company’s tax treatment of dividends and distributions were as follows (unaudited): Year Ended December 31, 2016 2015 2014 Tax treatment of dividends and distributions: Ordinary dividends $ 0.722 $ 1.591 $ 1.475 Qualified dividends — 0.037 0.088 Long-term capital gain 9.176 0.443 0.280 Unrecaptured section 1250 gain 3.117 0.139 0.157 Dividends and distributions declared per Common Share/Unit outstanding $ 13.015 $ 2.210 $ 2.000 The unaudited cost of land and depreciable property, net of accumulated depreciation, for federal income tax purposes as of December 31, 2016 and 2015 was approximately $15.8 billion and $17.0 billion , respectively.
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.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the "FASB") issued a comprehensive new revenue recognition standard entitled Revenue from Contracts with Customers that will supersede nearly all existing revenue recognition guidance. The new standard specifically excludes lease revenue. The new standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Companies will likely need to use more judgment and make more estimates than under current revenue recognition guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration, if any, to include in the transaction price and allocating the transaction price to each separate performance obligation. The new standard will be effective for the Company beginning on January 1, 2018 and early adoption will be permitted beginning on January 1, 2017. The new standard may be applied retrospectively to each prior period presented or prospectively with the cumulative effect recognized as of the date of adoption. The Company anticipates selecting the modified retrospective transition method with a cumulative effect recognized as of the date of adoption and will adopt the new standard effective January 1, 2018. The Company is continuing to evaluate the standard; however, we do not expect its adoption to have a significant impact on the consolidated financial statements, as in excess of 90% of total revenues consist of rental income from leasing arrangements, which is specifically excluded from the standard. In addition, the Company's fee and asset management activities are immaterial now that it sold its interest in Joint Base Lewis McChord (see Note 18 for further discussion) and given the nature of its disposition transactions, there should be no changes in accounting under the new standard. In August 2014, the FASB issued a new standard that will explicitly require management to assess an entity's ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. In connection with each annual and interim period, management will assess whether there is substantial doubt about an entity's ability to continue as a going concern within one year after the issuance date. Disclosures will be required if conditions give rise to substantial doubt. However, to determine the specific disclosures, management will need to assess whether its plans will alleviate substantial doubt. The Company adopted this new standard as required effective for the annual period ending after December 31, 2016. The adoption of this standard did not have a material impact on our consolidated results of operations or financial position. In February 2015, the FASB issued new consolidation guidance which makes changes to both the variable interest model and the voting model. Among other changes, the new standard specifically eliminated the presumption in the current voting model that a general partner controls a limited partnership or similar entity unless that presumption can be overcome. Generally, only a single limited partner that is able to exercise substantive kick-out rights will consolidate. The Company adopted this new standard as required effective January 1, 2016. While adoption of the new standard did not result in any changes to conclusions about whether a joint venture was consolidated or unconsolidated, the Company has determined that certain of its joint ventures and the Operating Partnership will now qualify as variable interest entities ("VIEs") and therefore will require additional disclosures. See Note 6 for further discussion. In April 2015, the FASB issued a new standard which requires companies to present debt financing costs as a direct deduction from the carrying amount of the associated debt liability rather than as an asset, consistent with the presentation of debt discounts on the consolidated balance sheets. Companies will be permitted to present debt issuance costs related to line of credit arrangements as an asset and amortize these costs over the term of the arrangement, regardless of whether there are any outstanding borrowings on the arrangement. The new standard must be applied retrospectively to all prior periods presented in the consolidated financial statements. The Company adopted this standard as required effective January 1, 2016 and other than presentation on the consolidated balance sheets, it did not have a material effect on its consolidated results of operations or financial position. As of December 31, 2016 , $12.1 million , $16.3 million and $26.4 million of deferred financing costs were included within other assets, mortgage notes payable, net and notes, net respectively, on the consolidated balance sheets. As of December 31, 2015, the following amounts of deferred financing costs were reclassified (amounts in thousands): As Originally Reclassification As Presented Deferred financing costs, net $ 54,004 $ (54,004 ) $ — Other assets $ 422,027 $ 6,872 $ 428,899 Mortgage notes payable, net $ 4,704,870 $ (19,736 ) $ 4,685,134 Notes, net $ 5,876,352 $ (27,396 ) $ 5,848,956 In January 2016, the FASB issued a new standard which requires companies to measure all equity securities with readily determinable fair values at fair value on the balance sheet, with changes in fair value recognized in net income. The new standard will be effective for the Company beginning on January 1, 2018. The Company does not expect that this will have a material effect on its consolidated results of operations or financial position. In February 2016, the FASB issued a new leases standard which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The new standard is expected to impact the Company’s consolidated financial statements as, among other things, the Company has certain operating ground lease arrangements for which it is the lessee. The new standard will be effective for the Company beginning on January 1, 2019, with early adoption permitted. The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position. In March 2016, the FASB issued a new standard which simplifies several aspects of the accounting for employee share-based payment transactions, including income tax consequences, classification of awards as equity or liability, statement of cash flows classification and policy election options for forfeitures. The new standard was effective for the Company beginning on January 1, 2017. The Company will continue to estimate the number of awards expected to be forfeited and adjust the estimate when it is no longer probable that the employee will fulfill the service condition, as is currently required. The Company does not expect that this will have a material effect on its consolidated results of operations or financial position. In June 2016, the FASB issued a new 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 will require entities to estimate a lifetime expected credit loss for most financial instruments, including lease and other trade receivables. The new standard will be effective for the Company beginning on January 1, 2020, with early adoption permitted beginning January 1, 2019. The Company is currently evaluating the impact of adopting the new standard on its consolidated results of operations and financial position. In August 2016 and October 2016, the FASB issued new standards to clarify how specific transactions are classified and presented on the statement of cash flows. Among other clarifications, the new standards specifically provide guidance for the following items within the statement of cash flows which have required significant judgment in the past: • Cash payments related to debt prepayments or extinguishment costs are to be classified within financing activities; • The portion of the cash payment made to settle a zero-coupon bond or a bond with an insignificant cash coupon attributable to accreted interest related to a debt discount is to be classified as a cash outflow within operating activities, and the portion attributable to the principal is to be classified within financing activities; • Insurance settlement proceeds are to be classified based on the nature of the loss; • Companies must elect to classify distributions received from equity method investees using either a cumulative earnings approach or a look-through approach and the election must be disclosed; and • Restricted cash will be included with cash and cash equivalents on the statement of cash flows. Total cash and cash equivalents and restricted cash are to be reconciled to the related line items on the balance sheet. The new standards must be applied retrospectively to all periods presented in the consolidated financial statements and they will be effective for the Company beginning on January 1, 2018, with early adoption permitted. The Company is currently evaluating the impact of adopting the new standards on its consolidated results of operations and financial position. In January 2017, the FASB issued a new standard which clarifies definition of a business. The standard's objective is to add additional guidance that assists companies in determining whether transactions should be accounted for as an asset acquistion or a business combination. The new standard first requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. If this threshold is met, the set is not a business. If this threshold is not met, the entity next evaluates whether the set meets the requirement that a business include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. Among other differences, transaction costs associated with asset acquisitions are capitalized while those associated with business combinations are expensed as incurred. In addition, purchase price in an asset acquisition is allocated on a relative fair value basis while in a business combination is generally measured at fair value. The new standard will be applied prospectively to any transactions occurring within the period of adoption. The new standard will be effective for the Company beginning on January 1, 2018, but the Company early adopted it as allowed effective January 1, 2017. The Company anticipates that substantially all of its transactions will now be accounted for as asset acquisitions, which means transaction costs will largely be capitalized as noted above.
Other	Other The Company is the controlling partner in various consolidated partnerships owning 17 properties and 3,215 apartment units having a noncontrolling interest book value of $10.6 million at December 31, 2016 . 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 four properties having a noncontrolling interest deficit balance of $7.7 million . These four 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, 2016 , the Company estimates the value of Noncontrolling Interest distributions for these four properties would have been approximately $62.6 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 four 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, 2016 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, 2016
Business [Abstract]
Schedule of Real Estate Properties	The ownership breakdown includes (table does not include various uncompleted development properties): Properties Apartment Units Wholly Owned Properties 280 72,445 Master-Leased Properties – Consolidated 3 853 Partially Owned Properties – Consolidated 17 3,215 Partially Owned Properties – Unconsolidated 2 945 302 77,458

Summary of Significant Accoun35

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Abstract]
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Table Text Block]	The fair value for the Company's share options was estimated at the time the share options were granted using the Black-Scholes option pricing model with the primary grant in each year having the following weighted average assumptions: 2016 2015 2014 Expected volatility (1) 26.3% 26.6% 27.0% Expected life (2) 5 years 5 years 5 years Expected dividend yield (3) 3.04% 3.13% 3.78% Risk-free interest rate (4) 1.27% 1.29% 1.50% Option valuation per share $13.02 $13.68 $9.12 (1) Expected volatility – Estimated based on the historical ten-year volatility of EQR’s share price measured on a monthly basis. (2) Expected life – Approximates the actual weighted average life of all share 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 prior to the grant date for a period matching the expected life of each grant.
Allocation Of Income Franchise And Excise Taxes In Consolidated Statements Of Operations [Table Text Block]	The Company provided for income, franchise and excise taxes allocated as follows in the consolidated statements of operations and comprehensive income for the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 2015 2014 Income and other tax expense (benefit) (1) $ 1,613 $ 917 $ 1,394 Discontinued operations, net (2) 12 15 8 Provision for income, franchise and excise taxes (3) $ 1,625 $ 932 $ 1,402 (1) Primarily includes state and local income, excise and franchise taxes. (2) Primarily represents state and local income, excise and franchise taxes on operating properties sold prior to January 1, 2014 and included in discontinued operations. The amounts included in discontinued operations for the years ending December 31, 2016, 2015 and 2014 represent trailing activity for properties sold in 2013 and prior years. None of the properties sold during the years ended December 31, 2016, 2015 and 2014 met the new criteria for reporting discontinued operations. (3) All provisions for income tax amounts are current and none are deferred.
Tax Treatment Of Dividends And Distributions [Table Text Block]	During the years ended December 31, 2016 , 2015 and 2014 , the Company’s tax treatment of dividends and distributions were as follows (unaudited): Year Ended December 31, 2016 2015 2014 Tax treatment of dividends and distributions: Ordinary dividends $ 0.722 $ 1.591 $ 1.475 Qualified dividends — 0.037 0.088 Long-term capital gain 9.176 0.443 0.280 Unrecaptured section 1250 gain 3.117 0.139 0.157 Dividends and distributions declared per Common Share/Unit outstanding $ 13.015 $ 2.210 $ 2.000
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	As of December 31, 2015, the following amounts of deferred financing costs were reclassified (amounts in thousands): As Originally Reclassification As Presented Deferred financing costs, net $ 54,004 $ (54,004 ) $ — Other assets $ 422,027 $ 6,872 $ 428,899 Mortgage notes payable, net $ 4,704,870 $ (19,736 ) $ 4,685,134 Notes, net $ 5,876,352 $ (27,396 ) $ 5,848,956

Equity, Capital and Other Int36

Equity, Capital and Other Interests (Tables)	12 Months Ended
	Dec. 31, 2016
Common shares and units rollforward	The following tables present the changes in the Company’s issued and outstanding Common Shares and “Units” (which includes OP Units and restricted units) for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 Common Shares Common Shares outstanding at January 1, 364,755,444 362,855,454 360,479,260 Common Shares Issued: Conversion of OP Units 88,838 208,307 94,671 Exercise of share options 815,044 1,456,363 2,086,380 Employee Share Purchase Plan (ESPP) 63,909 68,462 68,807 Restricted share grants, net 147,689 168,142 169,722 Common Shares Other: Conversion of restricted shares to restricted units — (1,284 ) (12,146 ) Repurchased and retired — — (31,240 ) Common Shares outstanding at December 31, 365,870,924 364,755,444 362,855,454 Units Units outstanding at January 1, 14,427,164 14,298,691 14,180,376 Restricted unit grants, net 287,749 335,496 200,840 Conversion of restricted shares to restricted units — 1,284 12,146 Conversion of OP Units to Common Shares (88,838 ) (208,307 ) (94,671 ) Units outstanding at December 31, 14,626,075 14,427,164 14,298,691 Total Common Shares and Units outstanding at December 31, 380,496,999 379,182,608 377,154,145 Units Ownership Interest in Operating Partnership 3.8 % 3.8 % 3.8 %
Redeemable Noncontrolling Interest [Table Text Block]	The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership for the years ended December 31, 2016 , 2015 and 2014 , respectively (amounts in thousands): 2016 2015 2014 Balance at January 1, $ 566,783 $ 500,733 $ 363,144 Change in market value (115,093 ) 64,378 139,818 Change in carrying value (9,598 ) 1,672 (2,229 ) Balance at December 31, $ 442,092 $ 566,783 $ 500,733
Schedule Of Preferred Stock [Table Text Block]	The following table presents the Company’s issued and outstanding Preferred Shares as of December 31, 2016 and 2015 : Amounts in thousands Redemption Annual December 31, 2016 December 31, 2015 Preferred Shares of beneficial interest, $0.01 par value; 8.29% Series K Cumulative Redeemable Preferred; liquidation 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the redemption date, redeemable preferred shares may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares are payable quarterly.
ERPOP [Member]
Common shares and units rollforward	The following tables present the changes in the Operating Partnership's issued and outstanding Units and in the limited partners' Units for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 General and Limited Partner Units General and Limited Partner Units outstanding at January 1, 379,182,608 377,154,145 374,659,636 Issued to General Partner: Exercise of EQR share options 815,044 1,456,363 2,086,380 EQR's Employee Share Purchase Plan (ESPP) 63,909 68,462 68,807 EQR's restricted share grants, net 147,689 168,142 169,722 Issued to Limited Partners: Restricted unit grants, net 287,749 335,496 200,840 OP Units Other: Repurchased and retired — — (31,240 ) General and Limited Partner Units outstanding at December 31, 380,496,999 379,182,608 377,154,145 Limited Partner Units Limited Partner Units outstanding at January 1, 14,427,164 14,298,691 14,180,376 Limited Partner restricted unit grants, net 287,749 335,496 200,840 Conversion of EQR restricted shares to restricted units — 1,284 12,146 Conversion of Limited Partner OP Units to EQR Common Shares (88,838 ) (208,307 ) (94,671 ) Limited Partner Units outstanding at December 31, 14,626,075 14,427,164 14,298,691 Limited Partner Units Ownership Interest in Operating Partnership 3.8 % 3.8 % 3.8 %
Redeemable Noncontrolling Interest [Table Text Block]	The following table presents the changes in the redemption value of the Redeemable Limited Partners for the years ended December 31, 2016 , 2015 and 2014 , respectively (amounts in thousands): 2016 2015 2014 Balance at January 1, $ 566,783 $ 500,733 $ 363,144 Change in market value (115,093 ) 64,378 139,818 Change in carrying value (9,598 ) 1,672 (2,229 ) Balance at December 31, $ 442,092 $ 566,783 $ 500,733
Schedule Of Preferred Stock [Table Text Block]	The following table presents the Operating Partnership's issued and outstanding “Preference Units” as of December 31, 2016 and 2015 : Amounts in thousands Redemption Annual December 31, 2016 December 31, 2015 Preference Units: 8.29% Series K Cumulative Redeemable Preference Units; 12/10/26 $ 4.145 $ 37,280 $ 37,280 $ 37,280 $ 37,280 (1) On or after the redemption date, redeemable preference units may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares. (2) Dividends on Preference Units are payable quarterly.

Real Estate (Tables)

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule Of Real Estate Investments And Accumulated Depreciation [Table Text Block]	The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of December 31, 2016 and 2015 (amounts in thousands): 2016 2015 Land $ 5,899,862 $ 5,864,046 Depreciable property: Buildings and improvements 16,913,430 16,346,829 Furniture, fixtures and equipment 1,346,300 1,207,098 In-Place lease intangibles 470,849 483,160 Projects under development: Land 115,876 284,995 Construction-in-progress 521,292 837,381 Land held for development: Land 84,440 120,007 Construction-in-progress 34,376 38,836 Investment in real estate 25,386,425 25,182,352 Accumulated depreciation (5,360,389 ) (4,905,406 ) Investment in real estate, net $ 20,026,036 $ 20,276,946
Schedule of Finite-Lived Intangible Assets [Table Text Block]	The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of December 31, 2016 and 2015 (amounts in thousands): Description Balance Sheet Location 2016 2015 Assets Ground lease intangibles – below market Other Assets $ 178,251 $ 178,251 Retail lease intangibles – above market Other Assets 1,260 1,260 Lease intangible assets 179,511 179,511 Accumulated amortization (17,972 ) (13,451 ) Lease intangible assets, net $ 161,539 $ 166,060 Liabilities Ground lease intangibles – above market Other Liabilities $ 2,400 $ 2,400 Retail lease intangibles – below market Other Liabilities 5,270 5,270 Lease intangible liabilities 7,670 7,670 Accumulated amortization (4,509 ) (3,414 ) Lease intangible liabilities, net $ 3,161 $ 4,256
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	The following table provides a summary of the aggregate amortization expense for above and below market ground lease intangibles and retail lease intangibles for each of the next five years (amounts in thousands): 2017 2018 2019 2020 2021 Ground lease intangibles $ 4,321 $ 4,321 $ 4,321 $ 4,321 $ 4,321 Retail lease intangibles (540 ) (71 ) (71 ) (71 ) (67 ) Total $ 3,781 $ 4,250 $ 4,250 $ 4,250 $ 4,254
Acquired Properties Table	During the year ended December 31, 2016 , the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 4 573 $ 249,334 Total 4 573 $ 249,334 (1) Purchase price includes an allocation of approximately $98.0 million to land and $151.3 million to depreciable property. During the year ended December 31, 2015 , the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands): Properties Apartment Units Purchase Price Rental Properties – Consolidated (1) 4 625 $ 296,037 Land Parcels (2) — — 27,800 Total 4 625 $ 323,837 (1) Purchase price includes an allocation of approximately $44.7 million to land and $251.3 million to depreciable property. (2) The Company acquired three contiguous land parcels in San Francisco during 2015 which will be combined for future development.
Disposed Properties Table	During the year ended December 31, 2015 , the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Consolidated: Rental Properties (1) 8 1,857 $ 513,312 Total 8 1,857 $ 513,312 (1) Includes a 193,230 square foot medical office building adjacent to our Longfellow Place property in Boston with a sales price of approximately $123.3 million which is not included in the Company's property and apartment unit counts. During the year ended December 31, 2016 , the Company disposed of the following to unaffiliated parties (sales price in thousands): Properties Apartment Units Sales Price Consolidated: Rental Properties (1) 98 29,440 $ 6,811,503 Land Parcels — — 57,455 Unconsolidated: Rental Properties (2) 1 336 74,500 Total 99 29,776 $ 6,943,458 (1) Includes the Starwood Portfolio sale (see further discussion below) representing 72 operating properties consisting of 23,262 apartment units for $5.365 billion . (2) The Company owned a 20% interest in this unconsolidated rental property. Sale price listed is the gross sale price. The Company's share of the net sales proceeds approximated $12.4 million .
Schedule of Real Estate Properties [Table Text Block]	The ownership breakdown includes (table does not include various uncompleted development properties): Properties Apartment Units Wholly Owned Properties 280 72,445 Master-Leased Properties – Consolidated 3 853 Partially Owned Properties – Consolidated 17 3,215 Partially Owned Properties – Unconsolidated 2 945 302 77,458
Starwood Portfolio [Member]
Disclosure of Long Lived Assets Held-for-sale [Table Text Block]	In accordance with this classification, the Company ceased depreciation on all assets in the Starwood Portfolio as of November 1, 2015 and the following assets were classified as held for sale in the accompanying consolidated balance sheets at December 31, 2015 (amounts in thousands): December 31, 2015 Land $ 602,737 Depreciable property: Buildings and improvements 2,386,489 Furniture, fixtures and equipment 335,565 In-Place lease intangibles 35,554 Real estate held for sale before accumulated depreciation 3,360,345 Accumulated depreciation (1,179,210 ) Real estate held for sale $ 2,181,135
Schedule of Real Estate Properties [Table Text Block]	The following table provides the operating segments/locations of the properties and apartment units sold in the Starwood Transaction, which represents substantially all of the assets in the Company's South Florida and Denver markets and certain assets in the Washington D.C., Seattle and Los Angeles markets. The sale of these properties represents the continuation of the Company's long-term strategy of investing in six core coastal markets. See Note 11 for further discussion. Markets/Metro Areas Properties Apartment Units South Florida 33 10,742 Denver 18 6,635 Washington D.C. 10 3,020 Seattle 8 1,721 Los Angeles 3 1,144 Total 72 23,262

Commitments To Acquire_Dispos38

Commitments To Acquire/Dispose of Real Estate (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments to Acquire Dispose of Real Estate [Abstract]
Real Estate To Be Disposed Table Text Block	The Company has entered into separate agreements to dispose of the following (sales price in thousands): Properties Apartment Units Sales Price Rental Properties 2 592 $ 98,700 Land Parcels (two) — — 36,150 Total 2 592 $ 134,850

Investments in Partially Owne39

Investments in Partially Owned Entities (Tables)	12 Months Ended
	Dec. 31, 2016
Investments in Partially Owned Entities [Abstract]
Partially Owned Property Balance Sheet Schedule [Table Text Block]	The following tables and information summarize the Company’s investments in partially owned entities as of December 31, 2016 (amounts in thousands except for project and apartment unit amounts): Consolidated Unconsolidated (VIE) (Non-VIE) (VIE) (1) Total Total properties 17 2 — 2 Total apartment units 3,215 945 — 945 Balance sheet information at 12/31/16 (at 100%): ASSETS Investment in real estate $ 646,320 $ 235,821 $ 172,995 $ 408,816 Accumulated depreciation (211,038 ) (32,881 ) (44,544 ) (77,425 ) Investment in real estate, net 435,282 202,940 128,451 331,391 Cash and cash equivalents 30,271 5,287 47 5,334 Investments in unconsolidated entities 46,908 — — — Deposits – restricted 345 262 — 262 Other assets 26,203 157 334 491 Total assets $ 539,009 $ 208,646 $ 128,832 $ 337,478 LIABILITIES AND EQUITY/CAPITAL Mortgage notes payable, net (2) $ 301,110 $ 145,424 $ — $ 145,424 Accounts payable & accrued expenses 1,088 189 135 324 Accrued interest payable 1,037 691 — 691 Other liabilities 600 268 70 338 Security deposits 1,850 493 — 493 Total liabilities 305,685 147,065 205 147,270 Noncontrolling Interests – Partially Owned Properties/Partners' equity 10,609 59,115 86,120 145,235 Company equity/General and Limited Partners' Capital 222,715 2,466 42,507 44,973 Total equity/capital 233,324 61,581 128,627 190,208 Total liabilities and equity/capital $ 539,009 $ 208,646 $ 128,832 $ 337,478
Partially Owned Property Income Statement Schedule [Table Text Block]	Consolidated Unconsolidated (VIE) (Non-VIE) (VIE) (1) Total Operating information for the year ended 12/31/16 (at 100%): Operating revenue $ 90,634 $ 26,615 $ 5,214 $ 31,829 Operating expenses 21,647 9,088 2,023 11,111 Net operating income 68,987 17,527 3,191 20,718 Property management 3,190 776 75 851 General and administrative/other 328 2 81 83 Depreciation 20,764 10,510 5,501 16,011 Operating income (loss) 44,705 6,239 (2,466 ) 3,773 Interest and other income 53 — — — Other expenses (8 ) — — — Interest: Expense incurred, net (13,857 ) (8,289 ) — (8,289 ) Amortization of deferred financing costs (345 ) (1 ) — (1 ) Income (loss) before income and other taxes and (loss) 30,548 (2,051 ) (2,466 ) (4,517 ) Income and other tax (expense) benefit (73 ) (13 ) — (13 ) (Loss) from investments in unconsolidated entities (1,439 ) — — — Net income (loss) $ 29,036 $ (2,064 ) $ (2,466 ) $ (4,530 ) (1) Includes the Company's unconsolidated interest in an entity that owns the land underlying our Wisconsin Place apartment property and owns and operates the parking facility. This entity is excluded from the property and apartment unit count. (2) All debt is non-recourse to the Company. Note: The above tables exclude EQR's ownership interest in ERPOP and the Company's interests in unconsolidated joint ventures established in connection with the acquisition of certain real estate related assets from Archstone Enterprise LP (such assets are referred to herein as "Archstone"). These ventures owned certain Archstone assets and succeeded to certain residual Archstone liabilities/litigation, as well as responsibility for tax protection arrangements and third-party preferred interests in former Archstone subsidiaries. The preferred interests had an aggregate liquidation value of $39.9 million at December 31, 2016 . The ventures are owned 60% by the Company. See below for further discussion.

Deposits - Restricted (Tables)

Deposits - Restricted (Tables)	12 Months Ended
	Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]
Schedule of Restricted Cash and Cash Equivalents [Table Text Block]	The following table presents the Company’s restricted deposits as of December 31, 2016 and 2015 (amounts in thousands): December 31, December 31, Tax-deferred (1031) exchange proceeds $ 38,847 $ — Earnest money on pending acquisitions — 1,000 Restricted deposits on real estate investments 733 6,077 Resident security and utility deposits 37,007 48,458 Other 359 358 Totals $ 76,946 $ 55,893
Escrow Deposits [Table Text Block]	The following table presents the Company’s escrow deposits as of December 31, 2016 and 2015 (amounts in thousands): December 31, December 31, Real estate taxes and insurance $ 2,003 $ 1,977 Replacement reserves 3,428 3,962 Mortgage principal reserves/sinking funds 58,652 50,155 Other 852 852 Totals $ 64,935 $ 56,946

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The following tables summarize the Company’s unsecured note balances and certain interest rate and maturity date information as of and for the years ended December 31, 2016 and 2015 , respectively: December 31, 2016 Net Principal Balance Interest Rate Ranges Weighted Average Interest Rate Maturity Date Ranges Fixed Rate Public Notes (1) $ 4,397,829 2.85% - 7.57% 4.90% 2017 - 2045 Floating Rate Public Notes (1) 450,250 (1) 1.28% 2019 Totals $ 4,848,079 December 31, 2015 Net Principal Balance Interest Rate Ranges Weighted Average Interest Rate Maturity Date Ranges Fixed Rate Public Notes (1) $ 5,397,552 3.00% - 7.57% 5.30% 2016 - 2045 Floating Rate Public Notes (1) 451,404 (1) 0.93% 2019 Totals $ 5,848,956 (1) Fair value interest rate swaps convert the $450.0 million 2.375% notes due July 1, 2019 to a floating interest rate of 90-Day LIBOR plus 0.61% .
Aggregate payments of principal on unsecured notes payable	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, 2016 (amounts in thousands): Year Total 2017 $ 628,458 2018 184,369 2019 1,286,037 2020 1,690,090 2021 941,157 Thereafter 4,366,516 Deferred Financing Costs (42,617 ) Net Unamortized (Discount) (66,752 ) Total $ 8,987,258

Derivative and Other Fair Val42

Derivative and Other Fair Value Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Derivative Instrument Table	The following table summarizes the Company’s consolidated derivative instruments at December 31, 2016 (dollar amounts are in thousands): Fair Value Current Notional Balance $ 450,000 Indicative Interest Rate 2.375 % Maturity Date 2019 (1) Fair Value Hedges – Converts outstanding fixed rate unsecured notes ( $450.0 million 2.375% notes due July 1, 2019 ) to a floating interest rate of 90-Day LIBOR plus 0.61% .
Schedule of Location and Amount of Financial Instruments on Balanace Sheet	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, 2016 and 2015 , respectively (amounts in thousands): Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2016 Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Derivatives designated as hedging instruments: Interest Rate Contracts: Fair Value Hedges Other Assets $ 1,857 $ — $ 1,857 $ — Supplemental Executive Retirement Plan Other Assets 124,420 124,420 — — Total $ 126,277 $ 124,420 $ 1,857 $ — Liabilities Supplemental Executive Retirement Plan Other Liabilities $ 124,420 $ 124,420 $ — $ — Total $ 124,420 $ 124,420 $ — $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 442,092 $ — $ 442,092 $ — Fair Value Measurements at Reporting Date Using Description Balance Sheet Location 12/31/2015 Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Derivatives designated as hedging instruments: Interest Rate Contracts: Fair Value Hedges Other Assets $ 3,655 $ — $ 3,655 $ — Supplemental Executive Retirement Plan Other Assets 105,942 105,942 — — Total $ 109,597 $ 105,942 $ 3,655 $ — Liabilities Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps Other Liabilities $ 673 $ — $ 673 $ — Supplemental Executive Retirement Plan Other Liabilities 105,942 105,942 — — Total $ 106,615 $ 105,942 $ 673 $ — Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners Mezzanine $ 566,783 $ — $ 566,783 $ —
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]	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, 2016 , 2015 and 2014 , respectively (amounts in thousands): December 31, 2016 Type of Fair Value Hedge Location of Amount of Hedged Item Income Statement Amount of Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ (1,798 ) Fixed rate debt Interest expense $ 1,798 Total $ (1,798 ) $ 1,798 December 31, 2015 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ 2,058 Fixed rate debt Interest expense $ (2,058 ) Total $ 2,058 $ (2,058 ) December 31, 2014 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 Derivatives designated as hedging instruments: Interest Rate Contracts: Interest Rate Swaps Interest expense $ 1,597 Fixed rate debt Interest expense $ (1,597 ) Total $ 1,597 $ (1,597 )
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	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, 2016 , 2015 and 2014 , respectively (amounts in thousands): Effective Portion Ineffective Portion December 31, 2016 Type of Cash Flow Hedge Amount of Location of Gain/(Loss) Amount of Gain/(Loss) Location of Amount of Gain/(Loss) Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (3,989 ) Interest expense $ (41,758 ) Interest expense $ (74 ) Total $ (3,989 ) $ (41,758 ) $ (74 ) Effective Portion Ineffective Portion December 31, 2015 Type of Cash Flow Hedge Amount of Location of Gain/(Loss) Amount of Gain/(Loss) Location of Amount of Gain/(Loss) Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (814 ) Interest expense $ (18,244 ) Interest expense $ (3,033 ) Total $ (814 ) $ (18,244 ) $ (3,033 ) Effective Portion Ineffective Portion December 31, 2014 Type of Cash Flow Hedge Amount of Location of Gain/(Loss) Amount of Gain/(Loss) Location of Amount of Gain/(Loss) Derivatives designated as hedging instruments: Interest Rate Contracts: Forward Starting Swaps $ (33,215 ) Interest expense $ (16,868 ) Interest expense $ 91 Total $ (33,215 ) $ (16,868 ) $ 91

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	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, 2016 2015 2014 Numerator for net income per share – basic: Income from continuing operations $ 4,479,586 $ 907,621 $ 657,101 Allocation to Noncontrolling Interests – Operating Partnership, net (171,491 ) (34,226 ) (24,771 ) Net (income) attributable to Noncontrolling Interests – Partially Owned Properties (16,430 ) (3,657 ) (2,544 ) Preferred distributions (3,091 ) (3,357 ) (4,145 ) Premium on redemption of Preferred Shares — (3,486 ) — Income from continuing operations available to Common Shares, net of Noncontrolling Interests 4,288,574 862,895 625,641 Discontinued operations, net of Noncontrolling Interests 498 382 1,522 Numerator for net income per share – basic $ 4,289,072 $ 863,277 $ 627,163 Numerator for net income per share – diluted: Income from continuing operations $ 4,479,586 $ 907,621 $ 657,101 Net (income) attributable to Noncontrolling Interests – Partially Owned Properties (16,430 ) (3,657 ) (2,544 ) Preferred distributions (3,091 ) (3,357 ) (4,145 ) Premium on redemption of Preferred Shares — (3,486 ) — Income from continuing operations available to Common Shares 4,460,065 897,121 650,412 Discontinued operations, net 518 397 1,582 Numerator for net income per share – diluted $ 4,460,583 $ 897,518 $ 651,994 Denominator for net income per share – basic and diluted: Denominator for net income per share – basic 365,002 363,498 361,181 Effect of dilutive securities: OP Units 13,827 13,576 13,718 Long-term compensation shares/units 3,163 3,546 2,836 Denominator for net income per share – diluted 381,992 380,620 377,735 Net income per share – basic $ 11.75 $ 2.37 $ 1.74 Net income per share – diluted $ 11.68 $ 2.36 $ 1.73 Net income per share – basic: Income from continuing operations available to Common Shares, net of $ 11.75 $ 2.37 $ 1.73 Discontinued operations, net of Noncontrolling Interests — — 0.01 Net income per share – basic $ 11.75 $ 2.37 $ 1.74 Net income per share – diluted: Income from continuing operations available to Common Shares $ 11.68 $ 2.36 $ 1.72 Discontinued operations, net — — 0.01 Net income per share – diluted $ 11.68 $ 2.36 $ 1.73
ERPOP [Member]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	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, 2016 2015 2014 Numerator for net income per Unit – basic and diluted: Income from continuing operations $ 4,479,586 $ 907,621 $ 657,101 Net (income) attributable to Noncontrolling Interests – Partially Owned Properties (16,430 ) (3,657 ) (2,544 ) Allocation to Preference Units (3,091 ) (3,357 ) (4,145 ) Allocation to premium on redemption of Preference Units — (3,486 ) — Income from continuing operations available to Units 4,460,065 897,121 650,412 Discontinued operations, net 518 397 1,582 Numerator for net income per Unit – basic and diluted $ 4,460,583 $ 897,518 $ 651,994 Denominator for net income per Unit – basic and diluted: Denominator for net income per Unit – basic 378,829 377,074 374,899 Effect of dilutive securities: Dilution for Units issuable upon assumed exercise/vesting of the Company's long-term compensation shares/units 3,163 3,546 2,836 Denominator for net income per Unit – diluted 381,992 380,620 377,735 Net income per Unit – basic $ 11.75 $ 2.37 $ 1.74 Net income per Unit – diluted $ 11.68 $ 2.36 $ 1.73 Net income per Unit – basic: Income from continuing operations available to Units $ 11.75 $ 2.37 $ 1.73 Discontinued operations, net — — 0.01 Net income per Unit – basic $ 11.75 $ 2.37 $ 1.74 Net income per Unit – diluted: Income from continuing operations available to Units $ 11.68 $ 2.36 $ 1.72 Discontinued operations, net — — 0.01 Net income per Unit – diluted $ 11.68 $ 2.36 $ 1.73

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations [Table Text Block]	The components of discontinued operations are outlined below and include the results of operations for the respective periods that the Company owned such assets for properties sold in 2013 and prior years during each of the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands). Year Ended December 31, 2016 2015 2014 REVENUES Rental income $ 355 $ 499 $ 1,309 Total revenues 355 499 1,309 EXPENSES (1) Property and maintenance (46 ) (60 ) (141 ) Real estate taxes and insurance (461 ) 65 267 General and administrative 119 85 89 Total expenses (388 ) 90 215 Discontinued operating income 743 409 1,094 Interest and other income 24 3 317 Other expenses (280 ) — — Income and other tax (expense) benefit (12 ) (15 ) (8 ) Discontinued operations 475 397 1,403 Net gain on sales of discontinued operations 43 — 179 Discontinued operations, net $ 518 $ 397 $ 1,582 (1) Includes expenses paid in the current period for properties sold in prior periods related to the Company’s period of ownership.
Starwood Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Condensed Income Statement [Table Text Block]	As a result, the following table summarizes the results of operations attributable to the Starwood Transaction for the years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 2015 2014 REVENUES Rental income $ 30,785 $ 427,433 $ 401,134 Total revenues 30,785 427,433 401,134 EXPENSES (1) Property and maintenance 7,838 78,189 76,579 Real estate taxes and insurance 2,912 48,403 46,416 Property management 2 11 11 General and administrative 23 38 24 Depreciation — 87,616 104,104 Total expenses 10,775 214,257 227,134 Operating income 20,010 213,176 174,000 Interest and other income 21 1 1 Other expenses — (35 ) (1 ) Interest (2): Expense incurred, net (380 ) (680 ) (701 ) Amortization of deferred financing costs (707 ) (559 ) (98 ) Income and other tax (expense) benefit (1 ) (1 ) (3 ) Net gain on sales of real estate properties 3,161,097 — — Income from operations 3,180,040 211,902 173,198 Income from operations attributable to Noncontrolling Interests – Partially Owned — — (14 ) Income from operations attributable to controlling interests – Operating Partnership 3,180,040 211,902 173,184 Income from operations attributable to Noncontrolling Interests – Operating Partnership (122,152 ) (8,083 ) (6,598 ) Income from operations attributable to controlling interests – Company $ 3,057,888 $ 203,819 $ 166,586 (1) Includes expenses paid in the current period for properties held for sale. (2) Includes only interest expense specific to secured mortgage notes payable for properties held for sale which was repaid at or before closing.

Share Incentive Plans (Tables)

Share Incentive Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Share-based Compensation [Abstract]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	The following tables summarize compensation information regarding the restricted shares, restricted units, share options and Employee Share Purchase Plan (“ESPP”) for the three years ended December 31, 2016 , 2015 and 2014 (amounts in thousands): Year Ended December 31, 2016 Compensation Expense Compensation Capitalized Restricted Units Compensation Equity Dividends Incurred Restricted shares (2) $ 13,539 $ 1,477 $ — $ 15,016 $ 6,494 Restricted units (2) 13,567 591 4,022 18,180 7,762 Share options 2,839 593 — 3,432 — ESPP discount 585 65 — 650 — Total $ 30,530 $ 2,726 $ 4,022 $ 37,278 $ 14,256 Year Ended December 31, 2015 Compensation Expense Compensation Capitalized Restricted Units In-Lieu of Bonus (1) Compensation Equity Dividends Incurred Restricted shares (2) $ 13,755 $ 1,311 $ — $ 15,066 $ 1,160 Restricted units (2) 17,311 538 3,654 21,503 1,619 Share options 2,746 1,010 — 3,756 — ESPP discount 795 89 — 884 — Total $ 34,607 $ 2,948 $ 3,654 $ 41,209 $ 2,779 Year Ended December 31, 2014 Compensation Expense Compensation Capitalized Compensation Equity Dividends Incurred Restricted shares $ 9,244 $ 660 $ 9,904 $ 1,012 Restricted units 11,049 920 11,969 1,248 Share options 6,453 896 7,349 — ESPP discount 797 62 859 — Total $ 27,543 $ 2,538 $ 30,081 $ 2,260 (1) Beginning in 2015, the Company allows officers the ability to receive immediately vested restricted units (subject to the book-up provisions and two-year hold restriction) in-lieu of any percentage of their annual cash bonus. (2) Includes performance 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, 2016 , 2015 and 2014 : Common Shares Subject to Options Weighted Average Exercise Price per Option Restricted Shares Weighted Average Fair Value per Restricted Share Restricted Weighted Balance at December 31, 2013 8,470,532 $43.67 500,234 $55.79 471,256 $55.67 Awards granted (1) 667,877 $56.72 176,457 $56.56 201,507 $53.82 Awards exercised/vested (2) (3) (4) (2,086,380 ) $39.34 (175,344 ) $53.44 (60,294 ) $53.71 Awards forfeited (19,022 ) $56.32 (6,735 ) $56.57 (667 ) $52.08 Awards expired (2,387 ) $55.24 — — — — Conversion of restricted shares — — (12,146 ) — 12,146 — Balance at December 31, 2014 7,030,620 $46.16 482,466 $56.89 623,948 $53.38 Awards granted (1) (5) 171,150 $80.15 174,112 $79.65 337,505 $81.87 Awards exercised/vested (2) (3) (4) (1,456,363 ) $42.64 (127,174 ) $60.21 (72,003 ) $57.12 Awards forfeited (9,550 ) $64.53 (5,970 ) $62.11 (2,009 ) $64.39 Awards expired (1,492 ) $39.86 — — — — Conversion of restricted shares — — (1,284 ) — 1,284 — Balance at December 31, 2015 5,734,365 $48.04 522,150 $63.67 888,725 $63.91 Awards granted (1) (5) 154,016 $64.99 154,296 $75.19 289,273 $81.05 Awards exercised/vested (2) (3) (4) (815,044 ) $38.01 (217,805 ) $57.75 (374,217 ) $52.73 Awards forfeited (10,512 ) $63.43 (6,607 ) $70.73 (1,524 ) $86.35 Awards expired (710 ) $68.40 — — — — Special dividend adjustment (6) 960,986 N/A — — — — Balance at December 31, 2016 6,023,101 $42.05 452,034 $70.35 802,257 $75.26 (1) The weighted average grant date fair value for Options granted during the years ended December 31, 2016 , 2015 and 2014 was $11.09 per share, $13.67 per share and $9.21 per share, respectively. (2) The aggregate intrinsic value of options exercised during the years ended December 31, 2016 , 2015 and 2014 was $26.2 million , $52.9 million and $50.8 million , respectively. 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. (3) The fair value of restricted shares vested during the years ended December 31, 2016 , 2015 and 2014 was $15.6 million , $10.2 million and $10.2 million , respectively. (4) The fair value of restricted units vested during the years ended December 31, 2016 , 2015 and 2014 was $27.2 million , $5.8 million and $3.4 million , respectively. (5) Includes performance awards granted under the executive compensation program. (6) In addition to the regular quarterly dividends, the Company paid two special dividends to its shareholders and holders of OP Units of $11.00 per share/unit in the aggregate in 2016. Option holders were not entitled to these special dividends, but pursuant to the terms of the Share Incentive Plans are due equitable adjustments of additional options. The special dividend adjustment's weighted average exercise price per option is reflected in the activity for 2016 for the awards granted, awards exercised/vested, and awards forfeited and the balance at December 31, 2016.
Information regarding options outstanding and exercisable	The following table summarizes information regarding options outstanding and exercisable at December 31, 2016 : Options Outstanding (1) Options Exercisable (2) Range of Exercise Prices Options Weighted Average Remaining Contractual Life in Years Weighted Average Exercise Price Options Weighted Average Exercise Price $19.67 to $24.93 892,111 2.10 $19.67 892,111 $19.67 $24.94 to $37.39 930,884 2.54 $29.42 930,884 $29.42 $37.40 to $43.62 2,412 3.83 $41.44 2,412 $41.44 $43.63 to $49.86 2,715,880 5.50 $46.59 2,515,401 $46.47 $49.87 to $56.09 1,114,654 5.16 $51.30 1,114,654 $51.30 $56.10 to $62.32 2,761 8.48 $60.80 2,761 $60.80 $62.33 to $68.55 364,399 8.57 $66.77 152,454 67.27 $19.67 to $68.55 6,023,101 4.66 $42.05 5,610,677 $40.91 Vested and expected to vest 6,003,870 4.55 $41.97 (1) The aggregate intrinsic value of options outstanding that are vested and expected to vest as of December 31, 2016 is $135.3 million . (2) The aggregate intrinsic value and weighted average remaining contractual life in years of options exercisable as of December 31, 2016 is $132.0 million and 4.4 years, respectively. Note: The aggregate intrinsic values in Notes (1) and (2) above were both calculated as the excess, if any, between the Company’s closing share price of $64.36 per share on December 31, 2016 and the strike price of the underlying awards.

Employee Plans (Tables)

Employee Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Employee Plans [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 (the net proceeds noted below were contributed to ERPOP in exchange for OP Units): Year Ended December 31, 2016 2015 2014 (Amounts in thousands except share and per share amounts) Shares issued 63,909 68,462 68,807 Issuance price ranges $51.85 – $63.37 $63.70 – $65.90 $45.90 – $55.95 Issuance proceeds $3,686 $4,404 $3,392

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies [Abstract]
Schedule of Contractual Obligations [Table Text Block]	The following table summarizes the Company’s contractual obligations for minimum rent payments under operating leases and deferred compensation for the next five years and thereafter as of December 31, 2016 : (Payments)/Receipts Due by Year (in thousands) 2017 2018 2019 2020 2021 Thereafter Total Operating Leases: Minimum Rent Payments (a) $ (15,917 ) $ (16,027 ) $ (15,890 ) $ (15,489 ) $ (15,256 ) $ (826,259 ) $ (904,838 ) Minimum Rent Receipts (b) 73,171 60,004 54,486 50,705 46,634 211,853 496,853 Other Long-Term Liabilities: Deferred Compensation (c) (1,387 ) (1,723 ) (1,128 ) (1,079 ) (1,079 ) (4,383 ) (10,779 ) (a) Minimum basic rent due for various office space the Company leases and fixed base rent due on ground leases for 11 properties. (b) Minimum basic rent receipts due for various retail/commercial space where the Company is the lessor. (c) Estimated payments to the Company's Chairman, Vice Chairman and one former CEO based on actual and planned retirement dates.

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Reconciliation of NOI	The following table presents a reconciliation of NOI from our rental real estate specific to continuing operations for the years ended December 31, 2016 , 2015 and 2014 , respectively (amounts in thousands): Year Ended December 31, 2016 2015 2014 Rental income $ 2,422,233 $ 2,736,578 $ 2,605,311 Property and maintenance expense (406,823 ) (479,160 ) (473,098 ) Real estate taxes and insurance expense (317,387 ) (339,802 ) (325,401 ) Total operating expenses (724,210 ) (818,962 ) (798,499 ) Net operating income $ 1,698,023 $ 1,917,616 $ 1,806,812
Reportable Segments Schedule	The following tables present NOI for each segment from our rental real estate specific to continuing operations for the years ended December 31, 2016 , 2015 and 2014 , respectively, as well as total assets and capital expenditures at December 31, 2016 and 2015 , respectively (amounts in thousands): Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Rental Income Operating Expenses NOI Same store (1) Los Angeles $ 368,734 $ 107,138 $ 261,596 $ 349,285 $ 104,614 $ 244,671 $ 259,437 $ 81,972 $ 177,465 San Diego 88,049 23,489 64,560 83,491 22,938 60,553 79,217 22,605 56,612 Orange County 79,602 18,931 60,671 75,068 18,550 56,518 71,440 18,211 53,229 Subtotal - Southern California 536,385 149,558 386,827 507,844 146,102 361,742 410,094 122,788 287,306 New York 457,882 160,772 297,110 450,460 152,682 297,778 455,598 156,881 298,717 Washington D.C. 424,055 126,154 297,901 417,985 123,450 294,535 451,973 131,964 320,009 San Francisco 365,019 88,141 276,878 343,089 84,603 258,486 340,252 96,217 244,035 Boston 237,683 66,283 171,400 232,462 67,252 165,210 244,612 70,070 174,542 Seattle 154,482 42,644 111,838 145,646 39,307 106,339 153,197 45,781 107,416 Other Markets 1,798 568 1,230 1,680 528 1,152 385,664 120,395 265,269 Total same store 2,177,304 634,120 1,543,184 2,099,166 613,924 1,485,242 2,441,390 744,096 1,697,294 Non-same store/other (2) (3) Non-same store 163,768 56,403 107,365 72,123 27,078 45,045 83,715 28,992 54,723 Other (3) 81,161 33,687 47,474 565,289 177,960 387,329 80,206 25,411 54,795 Total non-same store/other 244,929 90,090 154,839 637,412 205,038 432,374 163,921 54,403 109,518 Totals $ 2,422,233 $ 724,210 $ 1,698,023 $ 2,736,578 $ 818,962 $ 1,917,616 $ 2,605,311 $ 798,499 $ 1,806,812 (1) For the years ended December 31, 2016 and 2015 , same store primarily includes all properties acquired or completed that are stabilized prior to January 1, 2015 , less properties subsequently sold, which represented 69,879 apartment units. For the year ended December 31, 2014, same store primarily includes all properties acquired or completed that are stabilized prior to January 1, 2014, less properties subsequently sold, which represented 96,286 apartment units. (2) For the years ended December 31, 2016 and 2015, non-same store primarily includes properties acquired after January 1, 2015 , plus any properties in lease-up and not stabilized as of January 1, 2015 . For the year ended December 31, 2014, non-same store primarily includes properties acquired after January 1, 2014, plus any properties in lease-up and not stabilized as of January 1, 2014. (3) Other includes development, other corporate operations and operations prior to sale for properties sold in 2014 through 2016 that do not meet the new discontinued operations criteria. Year Ended December 31, 2016 Year Ended December 31, 2015 Total Assets Capital Expenditures Total Assets Capital Expenditures Same store (1) Los Angeles $ 2,513,979 $ 26,195 $ 2,586,859 $ 22,015 San Diego 471,937 5,172 488,260 4,608 Orange County 260,918 6,747 268,479 7,336 Subtotal - Southern California 3,246,834 38,114 3,343,598 33,959 New York 4,275,930 25,329 4,383,354 18,170 Washington D.C. 3,916,264 33,867 4,023,474 33,455 San Francisco 2,441,256 24,411 2,506,004 25,104 Boston 1,723,942 20,936 1,774,181 17,355 Seattle 1,031,764 13,464 1,061,351 9,106 Other Markets 12,902 67 13,162 182 Total same store 16,648,892 156,188 17,105,124 137,331 Non-same store/other (2) (3) Non-same store 2,864,250 12,179 2,441,637 6,341 Other (3) 1,191,006 3,810 3,563,435 38,441 Total non-same store/other 4,055,256 15,989 6,005,072 44,782 Totals $ 20,704,148 $ 172,177 $ 23,110,196 $ 182,113 (1) Same store primarily includes all properties acquired or completed that are stabilized prior to January 1, 2015 , less properties subsequently sold, which represented 69,879 apartment units. (2) Non-same store primarily includes properties acquired after January 1, 2015 , plus any properties in lease-up and not stabilized as of January 1, 2015 . (3) Other includes development, other corporate operations and capital expenditures for properties sold.

Quarterly Financial Data (Una49

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Schedule of Quarterly Financial Information [Table Text Block]	The following unaudited quarterly data has been prepared on the basis of a December 31 year-end. Amounts are in thousands, except for per share amounts. First Quarter Second Quarter Third Quarter Fourth Quarter 2016 3/31 6/30 9/30 12/31 Total revenues $ 619,083 $ 595,154 $ 606,074 $ 605,489 Operating income 216,625 206,018 209,373 224,070 Income from continuing operations 3,731,988 228,365 217,246 301,987 Discontinued operations, net (157 ) 35 246 394 Net income * 3,731,831 228,400 217,492 302,381 Net income available to Common Shares 3,586,985 218,067 207,543 276,477 Earnings per share – basic: Net income available to Common Shares $ 9.84 $ 0.60 $ 0.57 $ 0.76 Weighted average Common Shares outstanding 364,592 365,047 365,109 365,256 Earnings per share – diluted: Net income available to Common Shares $ 9.76 $ 0.59 $ 0.56 $ 0.75 Weighted average Common Shares outstanding 382,243 382,065 382,373 381,860 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 3/31 6/30 9/30 12/31 Total revenues $ 666,371 $ 679,112 $ 696,289 $ 703,193 Operating income 218,331 246,255 257,594 287,058 Income from continuing operations 190,069 298,504 205,375 213,673 Discontinued operations, net 155 114 81 47 Net income * 190,224 298,618 205,456 213,720 Net income available to Common Shares 178,842 285,587 195,859 202,989 Earnings per share – basic: Net income available to Common Shares $ 0.49 $ 0.79 $ 0.54 $ 0.56 Weighted average Common Shares outstanding 363,098 363,476 363,579 363,828 Earnings per share – diluted: Net income available to Common Shares $ 0.49 $ 0.78 $ 0.53 $ 0.55 Weighted average Common Shares outstanding 380,327 380,491 380,663 381,220 * The Company did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2016 and 2015 . Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.
ERPOP [Member]
Schedule of Quarterly Financial Information [Table Text Block]	The following unaudited quarterly data has been prepared on the basis of a December 31 year-end. Amounts are in thousands, except for per Unit amounts. First Quarter Second Quarter Third Quarter Fourth Quarter 2016 3/31 6/30 9/30 12/31 Total revenues $ 619,083 $ 595,154 $ 606,074 $ 605,489 Operating income 216,625 206,018 209,373 224,070 Income from continuing operations 3,731,988 228,365 217,246 301,987 Discontinued operations, net (157 ) 35 246 394 Net income * 3,731,831 228,400 217,492 302,381 Net income available to Units 3,730,294 226,847 215,896 287,546 Earnings per Unit – basic: Net income available to Units $ 9.84 $ 0.60 $ 0.57 $ 0.76 Weighted average Units outstanding 378,289 378,934 379,008 379,081 Earnings per Unit – diluted: Net income available to Units $ 9.76 $ 0.59 $ 0.56 $ 0.75 Weighted average Units outstanding 382,243 382,065 382,373 381,860 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 3/31 6/30 9/30 12/31 Total revenues $ 666,371 $ 679,112 $ 696,289 $ 703,193 Operating income 218,331 246,255 257,594 287,058 Income from continuing operations 190,069 298,504 205,375 213,673 Discontinued operations, net 155 114 81 47 Net income * 190,224 298,618 205,456 213,720 Net income available to Units 185,901 296,941 203,637 211,039 Earnings per Unit – basic: Net income available to Units $ 0.49 $ 0.79 $ 0.54 $ 0.56 Weighted average Units outstanding 376,696 377,063 377,147 377,380 Earnings per Unit – diluted: Net income available to Units $ 0.49 $ 0.78 $ 0.53 $ 0.55 Weighted average Units outstanding 380,327 380,491 380,663 381,220 * The Operating Partnership did not have any extraordinary items or cumulative effect of change in accounting principle during the years ended December 31, 2016 and 2015 . Therefore, income before extraordinary items and cumulative effect of change in accounting principle is not shown as it was equal to the net income amounts disclosed above.

Business (Details)

Business (Details)	Dec. 31, 2016
Business (Textuals) [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	96.20%
Number of States in which Entity Operates	10
Number of operating properties under long-term ground leases	13
Property/Unit schedule
Properties	302
Apartment Units	77,458
Wholly Owned Properties
Property/Unit schedule
Properties	280
Apartment Units	72,445
Master-Leased Properties – Consolidated
Property/Unit schedule
Properties	3
Apartment Units	853
Partially Owned Properties – Consolidated
Property/Unit schedule
Properties	17
Apartment Units	3,215
Partially Owned Properties – Unconsolidated
Property/Unit schedule
Properties	2
Apartment Units	945

Summary of Significant Accoun51

Summary of Significant Accounting Policies Text (Details)	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Properties	302
Value of furniture and fixtures minimum range	$ 10,000
Value of furniture and fixtures maximum range	$ 25,000
Lease Intangibles, Average Term	6 months
Capitalized Costs Development and Renovation	$ 18,700,000	$ 22,300,000	$ 22,400,000
Debt Issuance Costs, Net	42,617,000	0
Other assets	398,883,000	428,899,000
Secured Debt	4,119,181,000	4,685,134,000
Notes, net	$ 4,848,079,000	5,848,956,000
Apartment Units	77,458
Noncontrolling Interests Partially Owned Properties	$ 10,609,000	4,608,000
Minimum [Member]
Retail/Commercial Leases Term	5
Maximum [Member]
Retail/Commercial Leases Term	10
Adjustments for New Accounting Pronouncement [Member]
Debt Issuance Costs, Net		(54,004,000)
Other assets		6,872,000
Secured Debt		(19,736,000)
Notes, net		(27,396,000)
Scenario, Previously Reported [Member]
Debt Issuance Costs, Net		54,004,000
Other assets		422,027,000
Secured Debt		4,704,870,000
Notes, net		5,876,352,000
Other Assets [Member]
Debt Issuance Costs, Net	$ 12,100,000	16,300,000	$ 26,400,000
Furniture and Fixtures [Member]
Property, Plant and Equipment, Estimated Useful Lives	5
Furniture and Fixtures Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives	10
Building [Member]
Property, Plant and Equipment, Estimated Useful Lives	30
Building Improvements [Member]
Property, Plant and Equipment, Estimated Useful Lives	8
Replacements Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives	5
Replacements Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives	10
Renovations and Improvements Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives	5
Renovations and Improvements Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives	15
Partially Owned Properties – Unconsolidated
Properties	2
Other assets	$ 491,000
Secured Debt	$ 145,424,000
Apartment Units	945
Noncontrolling Interests Partially Owned Properties	$ 145,235,000
Partially Owned Properties – Consolidated
Properties	17
Apartment Units	3,215
Limited Life Partnership Properties [Member]
Properties	4
Noncontrolling Interests Partially Owned Properties		$ 7,700,000
Noncontrolling Interests Settlement Value	$ 62,600,000

Summary of Significant Accoun52

Summary of Significant Accounting Policies Compensation (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	26.30%	26.60%	27.00%
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	3.04%	3.13%	3.78%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.27%	1.29%	1.50%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 13.02	$ 13.68	$ 9.12
Historical Volatility Period Basis	10 years

Summary of Significant Accoun53

Summary of Significant Accounting Policies Tax (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets Gross	$ 38,700
Income and other tax (expense) benefit	1,613	$ 917	$ 1,394
Discontinued Operation, Tax Effect of Discontinued Operation	12	$ 15	$ 8
Operating Loss Carryforwards	$ 16,400
Tax Treatment Of Dividends And Distributions Ordinary Dividends	$ 0.722	$ 1.591	$ 1.475
Tax Treatment Of Dividends And Distributions Qualified Dividends	0	0.037	0.088
Tax Treatment Of Dividends And Distributions Long Term Capital Gain	9.176	0.443	0.280
Tax Treatment Of Dividends And Distributions Unrecaptured Section Twelve Hundred And Fifty Gain	3.117	0.139	0.157
Distributions declared per Common Share outstanding	$ 13.015	$ 2.210	$ 2
Land And Depreciable Property Net	$ 15,800,000	$ 17,000,000
Minimum [Member]
Operating Loss Carryforwards, Expiration Dates	Jan. 1, 2030
Maximum [Member]
Operating Loss Carryforwards, Expiration Dates	Dec. 31, 2032
Income, Franchise, and Exise Taxes [Member]
Income and other tax (expense) benefit	$ 1,613	917	$ 1,394
Discontinued Operation, Tax Effect of Discontinued Operation	12	15	8
Provision for income, franchise and excise taxes	$ 1,625	$ 932	$ 1,402

Equity and Redeemable Noncontro

Equity and Redeemable Noncontrolling Interests of Equity Residential - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Common Stock, Shares, Outstanding	365,870,924	364,755,444	362,855,454	360,479,260
Common Shares Issued:
Conversion of OP Units	88,838	208,307	94,671
Exercise of share options	815,044	1,456,363	2,086,380
Employee Share Purchase Plan (ESPP)	63,909	68,462	68,807
Restricted share grants, net	147,689	168,142	169,722
Common Shares Other:
Conversion of restricted shares to restricted units	0	(1,284)	(12,146)
Stock Repurchased and Retired During Period, Shares	0	0	(31,240)
Units
Units Ownership Interest in Operating Partnership	3.80%	3.80%	3.80%
Redeemable Noncontrolling Interests – Operating Partnership	$ 442,092	$ 566,783	$ 500,733	$ 363,144
Change in market value of Redeemable Noncontrolling Interests – Operating Partnership	$ (115,093)	$ 64,378	$ 139,818
Common Shares And Units Outstanding	380,496,999	379,182,608	377,154,145
Change in carrying value	$ (9,598)	$ 1,672	$ (2,229)
ERPOP [Member]
Common Shares Issued:
Exercise of share options	815,044	1,456,363	2,086,380
Employee Share Purchase Plan (ESPP)	63,909	68,462	68,807
Restricted share grants, net	147,689	168,142	169,722
Common Shares Other:
Conversion of restricted shares to restricted units	0	1,284	12,146
Stock Repurchased and Retired During Period, Shares	0	0	(31,240)
Units
Total Units Outstanding	14,626,075	14,427,164	14,298,691	14,180,376
Restricted unit grants, net	287,749	335,496	200,840
Shares Issued During Period Shares Conversion Of Units To Common Shares	(88,838)	(208,307)	(94,671)
Units Ownership Interest in Operating Partnership	3.80%	3.80%	3.80%
Common Shares And Units Outstanding	380,496,999	379,182,608	377,154,145	374,659,636

Capital and Redeemable Limited

Capital and Redeemable Limited Partners of ERP Operating Limited Partnership - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Common Shares And Units Outstanding	380,496,999	379,182,608	377,154,145
Exercise of EQR share options	815,044	1,456,363	2,086,380
EQR's Employee Share Purchase Plan (ESPP)	63,909	68,462	68,807
EQR's restricted share grants, net	147,689	168,142	169,722
Stock Repurchased and Retired During Period, Shares	0	0	(31,240)
Conversion of restricted shares to restricted units	0	(1,284)	(12,146)
Units Ownership Interest in Operating Partnership	3.80%	3.80%	3.80%
ERPOP [Member]
Common Shares And Units Outstanding	380,496,999	379,182,608	377,154,145	374,659,636
Exercise of EQR share options	815,044	1,456,363	2,086,380
EQR's Employee Share Purchase Plan (ESPP)	63,909	68,462	68,807
EQR's restricted share grants, net	147,689	168,142	169,722
Restricted unit grants, net	287,749	335,496	200,840
Stock Repurchased and Retired During Period, Shares	0	0	(31,240)
Conversion of restricted shares to restricted units	0	1,284	12,146
Shares Issued During Period Shares Conversion Of Units To Common Shares	(88,838)	(208,307)	(94,671)
Total Units Outstanding	14,626,075	14,427,164	14,298,691	14,180,376
Units Ownership Interest in Operating Partnership	3.80%	3.80%	3.80%
Redeemable Limited Partners	$ 442,092	$ 566,783	$ 500,733	$ 363,144
Limited Partners Change In Redemption Value	(115,093)	64,378	139,818
Limited Partners Change In Carrying Value	$ (9,598)	$ 1,672	$ (2,229)

Issued and Outstanding Preferre

Issued and Outstanding Preferred Shares and Preference Units - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at December 31, 2016 and 2015	$ 37,280	$ 37,280
Premium on redemption of Preferred Shares	$ 0	$ (3,486)	$ 0
Series K 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 Unit	$ 50	$ 50
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%	8.29%
Preferred Stocks Preference Units Redemption Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at December 31, 2016 and 2015	$ 37,280	$ 37,280
Treasury Stock, Shares, Retired		254,400
Redemption of Preferred Shares		$ 12,700
Treasury Stock Retired, Cash Consideration		16,300
Premium on redemption of Preferred Shares		3,500
ERPOP [Member]
Class of Stock [Line Items]
8.29% Series K Cumulative Redeemable Preference Units; liquidation value $50 per unit; 745,600 units issued and outstanding at December 31, 2016 and 2015	37,280	37,280
Premium on redemption of Preferred Shares	$ 0	$ 3,486	$ 0
ERPOP [Member] | Series K 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 Unit	$ 50	$ 50
Preferred Stock Preference Units Dividend Rate Percentage	8.29%	8.29%
Preferred Stocks Preference Units Redemption Date	Dec. 10, 2026
Annual Dividend Per Preferred Share Preference Unit	$ 4.145
8.29% Series K Cumulative Redeemable Preference Units; liquidation value $50 per unit; 745,600 units issued and outstanding at December 31, 2016 and 2015	$ 37,280	$ 37,280
Treasury Stock, Shares, Retired		254,400
Redemption of Preferred Shares		$ 12,700
Treasury Stock Retired, Cash Consideration		16,300
Premium on redemption of Preferred Shares		$ 3,500

Other

Other $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)$ / sharesshares
Additional Common Shares Authorized | shares	13,000,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | shares	13,000,000
Stock Repurchased and Retired During Period, Shares | shares	0	0	31,240
Treasury Stock Acquired, Average Cost Per Share | $ / shares			$ 56.87
OP units repurchased and retired	$ 0	$ 0	$ 1,777
Partially Owned Properties Acquired Properties			1
Partially Owned Units Acquired Units			268
Change in Paid In Capital			$ 2,300
Reduction In Partially Owned Properties			2,200
Reduction In Other Liabilities			1,000
Partner Buyout [Member]
Purchase Price, Business Acquisition, Cost of Acquired Entity			$ 5,500
ERPOP [Member]
Stock Repurchased and Retired During Period, Shares | shares	0	0	31,240
OP units repurchased and retired	$ 0	$ 0	$ 1,777
NONCONTROLLING INTERESTS – PARTIALLY OWNED PROPERTIES
Land parcels acquired			1

Real Estate Investment in Real

Real Estate Investment in Real Estate - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Land	$ 5,899,862	$ 5,864,046
Depreciable property [Abstract]
Buildings and improvements	16,913,430	16,346,829
Furniture, fixtures and equipment	1,346,300	1,207,098
Finite-Lived Intangible Asset, Acquired-in-Place Leases	470,849	483,160
Projects under development [Abstract]
Construction-in-progress	637,168	1,122,376
Land held for development [Abstract]
Land held for development	118,816	158,843
Construction-in-progress	637,168	1,122,376
Investment in real estate	25,386,425	25,182,352
Accumulated depreciation	(5,360,389)	(4,905,406)
Investment in real estate, net	20,026,036	20,276,946
Amortization of above/below market leases	3,426	3,382	$ 3,222
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	3,781
Finite-Lived Intangible Assets, Amortization Expense, Year Two	4,250
Finite-Lived Intangible Assets, Amortization Expense, Year Three	4,250
Finite-Lived Intangible Assets, Amortization Expense, Year Four	4,250
Finite-Lived Intangible Assets, Amortization Expense, Year Five	4,254
Assets [Member]
Land held for development [Abstract]
Below Market Lease, Gross	178,251	178,251
Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross	1,260	1,260
Lease intangible assets	179,511	179,511
Finite-Lived Intangible Assets, Accumulated Amortization	(17,972)	(13,451)
Finite-Lived Intangible Assets, Net	161,539	166,060
Liability [Member]
Land held for development [Abstract]
Below Market Lease, Gross	5,270	5,270
Ground lease intangibles – above market	2,400	2,400
Lease Intangible Liabilities	7,670	7,670
Finite Lived Intangible Liabilities Accumulated Amortization	(4,509)	(3,414)
Lease Intangible Liabilities, net	3,161	4,256
Ground Lease [Member]
Land held for development [Abstract]
Amortization of above/below market leases	4,300	4,300	4,300
Finite-lived Intangible Assets; Amortization Exp, Next Twelve Months	4,321
Finite-lived Intangible Assets; Amortization Exp, Year 2	4,321
Finite-lived Intangible Assets; Amortization Exp, Year 3	4,321
Finite-lived Intangible Assets; Amortization Exp, Year 4	4,321
Finite-lived Intangible Assets; Amortization Exp, Year 5	4,321
Retail Site [Member]
Land held for development [Abstract]
Amortization of above/below market leases	900	900	$ 1,100
Finite-lived Intangible Assets; Amortization Exp, Next Twelve Months	(540)
Finite-lived Intangible Assets; Amortization Exp, Year 2	(71)
Finite-lived Intangible Assets; Amortization Exp, Year 3	(71)
Finite-lived Intangible Assets; Amortization Exp, Year 4	(71)
Finite-lived Intangible Assets; Amortization Exp, Year 5	(67)
Projects under development [Member]
Projects under development [Abstract]
Land Under Development	115,876	284,995
Construction-in-progress	521,292	837,381
Land held for development [Abstract]
Construction-in-progress	521,292	837,381
Land held for development [Member]
Projects under development [Abstract]
Construction-in-progress	34,376	38,836
Land held for development [Abstract]
Land held for development	84,440	120,007
Construction-in-progress	$ 34,376	$ 38,836

Real Estate Acquisitions and Di

Real Estate Acquisitions and Dispositions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)property	Dec. 31, 2015USD ($)property	Dec. 31, 2014USD ($)
Properties acquired | property	4	4
Property Units Acquired	573	625
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 249,334	$ 323,837
Disposed Properties	99	8
Disposed Units	29,776	1,857
Proceeds From Sale Of Property	$ 6,943,458	$ 513,312
Distributions from unconsolidated entities – return of capital	13,798	51,144	$ 103,793
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net gain (loss) on sales of land parcels	$ 15,731	(1)	5,277
Starwood Portfolio [Member]
Disposed Properties | property	72
Disposed Units	23,262
Proceeds From Sale Of Property	$ 5,365,000
Net gain on sales of real estate properties	$ 3,161,097	$ 0	$ 0
Consolidated Rental Properties [Member]
Properties acquired | property	4	4
Property Units Acquired	573	625
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 249,334	$ 296,037
Disposed Properties | property	98	8
Disposed Units	29,440	1,857
Proceeds From Sale Of Property	$ 6,811,503	$ 513,312
Consolidated Rental Properties [Member] | Land [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	98,000	44,700
Consolidated Rental Properties [Member] | Depreciable Property [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 151,300	251,300
Consolidated Rental Properties [Member] | Starwood Portfolio [Member]
Disposed Properties | property	72
Disposed Units	23,262
Land [Member]
Land parcels acquired	3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		$ 27,800
Disposed Land Parcels	2
Proceeds From Sale Of Property	$ 57,455
Commercial Real Estate [Member]
Commercial Properties Disposed		1
Proceeds From Sale Of Property		$ 123,300
Partially Owned Properties – Unconsolidated
Disposed Properties	1
Disposed Units	336
Proceeds From Sale Of Property	$ 74,500
Equity Method Investment, Ownership Percentage	20.00%
Distributions from unconsolidated entities – return of capital	$ 12,400
Net gain on sales of real estate properties	$ 8,900

Real Estate Starwood Dispositio

Real Estate Starwood Disposition $ / shares in Units, $ in Thousands	Oct. 14, 2016USD ($)$ / shares	Mar. 10, 2016USD ($)$ / shares	Dec. 31, 2016USD ($)property$ / shares	Dec. 31, 2015USD ($)property$ / shares	Dec. 31, 2014$ / shares
Disposed Properties			99	8
Disposed Units			29,776	1,857
Proceeds From Sale Of Property			$ 6,943,458	$ 513,312
Earnest Money Deposits			0	1,000
Land			5,899,862	5,864,046
Depreciable property Abstract
Buildings and improvements			16,913,430	16,346,829
Furniture, fixtures and equipment			1,346,300	1,207,098
Real estate held for sale before accumulated depreciation			25,386,425	25,182,352
Accumulated depreciation			(5,360,389)	(4,905,406)
Real estate held for sale			$ 0	$ 2,181,135
Distributions declared per Common Share outstanding | $ / shares			$ 13.015	$ 2.210	$ 2
Starwood Portfolio [Member]
Disposed Properties | property			72
Disposed Units			23,262
Proceeds From Sale Of Property			$ 5,365,000
Earnest Money Deposits				$ 250,000
Land				602,737
Depreciable property Abstract
Buildings and improvements				2,386,489
Furniture, fixtures and equipment				335,565
In-Place lease intangibles				35,554
Real estate held for sale before accumulated depreciation				3,360,345
Accumulated depreciation				(1,179,210)
Real estate held for sale				$ 2,181,135
Distributions declared per Common Share outstanding | $ / shares	$ 3	$ 8	$ 11
Payments of Dividends	$ 1,100,000	$ 3,000,000
Starwood Portfolio [Member] | South Florida
Disposed Properties | property			33
Disposed Units			10,742
Starwood Portfolio [Member] | Denver
Disposed Properties | property			18
Disposed Units			6,635
Starwood Portfolio [Member] | Washington D.C.
Disposed Properties | property			10
Disposed Units			3,020
Starwood Portfolio [Member] | Seattle
Disposed Properties | property			8
Disposed Units			1,721
Starwood Portfolio [Member] | Los Angeles
Disposed Properties | property			3
Disposed Units			1,144
Consolidated Rental Properties [Member]
Disposed Properties | property			98	8
Disposed Units			29,440	1,857
Proceeds From Sale Of Property			$ 6,811,503	$ 513,312
Consolidated Rental Properties [Member] | Starwood Portfolio [Member]
Disposed Properties | property			72
Disposed Units			23,262

Real Estate Other (Details)

Real Estate Other (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 249,334	$ 323,837
Investment in real estate, net	20,026,036	20,276,946
Noncontrolling Interests Partially Owned Properties	10,609	4,608
Deposits – restricted	76,946	$ 55,893
Company's Portion [Member]
Land purchase price	76,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	102,500
Joint Venture Partner [Member]
Land purchase price	57,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	75,700
Investment in real estate, net	116,700
Noncontrolling Interests Partially Owned Properties	117,300
Accrued Liabilities	1,100
Deposits – restricted	$ 1,700

Commitments to Acquire_Dispos62

Commitments to Acquire/Dispose of Real Estate (Details) - Subsequent Event [Member] $ in Thousands	Feb. 17, 2017USD ($)property
Properties Contracted To Be Disposed | property	2
Units Contracted To Be Disposed	592
Sales Price For Commitments To Dispose	$ 134,850
Rental Properties Disposed of [Member]
Properties Contracted To Be Disposed | property	2
Units Contracted To Be Disposed	592
Sales Price For Commitments To Dispose	$ 98,700
Land [Member]
Sales Price For Commitments To Dispose	$ 36,150
Land Parcels Contracted To Be Disposed	2

Investments in Partially Owne63

Investments in Partially Owned Entities (Details)	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)property	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Feb. 27, 2013USD ($)
Partially Owned Property Balance Sheet Schedule
Properties	302
Apartment Units	77,458
ASSETS
Investment in real estate	$ 25,386,425,000	$ 25,182,352,000
Accumulated depreciation	(5,360,389,000)	(4,905,406,000)
Investment in real estate, net	20,026,036,000	20,276,946,000
Cash and cash equivalents	77,207,000	42,276,000	$ 40,080,000	$ 53,534,000
Investments in unconsolidated entities	60,141,000	68,101,000
Deposits – restricted	76,946,000	55,893,000
Other assets	398,883,000	428,899,000
Total assets	20,704,148,000	23,110,196,000
LIABILITIES AND EQUITY
Secured Debt	4,119,181,000	4,685,134,000
Accounts payable and accrued expenses	147,482,000	187,124,000
Accrued interest payable	60,946,000	85,221,000
Other liabilities	350,466,000	366,387,000
Security deposits	62,624,000	77,582,000
Total liabilities	9,801,072,000	11,847,058,000
Partially Owned Properties	10,609,000	4,608,000
Total liabilities and equity/capital	20,704,148,000	23,110,196,000
Partially Owned Property Income Statement Schedule
Operating revenue	2,425,800,000	2,744,965,000	2,614,748,000
Property management	82,015,000	86,206,000	85,065,000
General and administrative/other	57,840,000	64,664,000	50,679,000
Depreciation	705,649,000	765,895,000	758,861,000
Operating income	856,086,000	1,009,238,000	921,644,000
Interest and other income	65,773,000	7,372,000	4,462,000
Other expenses	(10,368,000)	(2,942,000)	(9,073,000)
Interest:
Expense incurred, net	(482,246,000)	(444,487,000)	(457,460,000)
Amortization of deferred financing costs	(12,633,000)	(10,801,000)	(11,088,000)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	416,612,000	558,380,000	448,485,000
Income and other tax (expense) benefit	(1,613,000)	(917,000)	(1,394,000)
Income (loss) from investments in unconsolidated entities	4,801,000	15,025,000	(7,952,000)
Net income	$ 4,480,104,000	$ 908,018,000	658,683,000
Investments In Partially Owned Entities (Textuals) [Abstract]
Disposed Properties	99	8
Apartment Units	29,776	1,857
Net gain on sales of real estate properties	$ 4,044,055,000	$ 335,134,000	$ 212,685,000
Consolidated VIE
Partially Owned Property Balance Sheet Schedule
Properties	17
Apartment Units	3,215
ASSETS
Investment in real estate	$ 646,320,000
Accumulated depreciation	(211,038,000)
Investment in real estate, net	435,282,000
Cash and cash equivalents	30,271,000
Investments in unconsolidated entities	46,908,000
Deposits – restricted	345,000
Other assets	26,203,000
Total assets	539,009,000
LIABILITIES AND EQUITY
Secured Debt	301,110,000
Accounts payable and accrued expenses	1,088,000
Accrued interest payable	1,037,000
Other liabilities	600,000
Security deposits	1,850,000
Total liabilities	305,685,000
Partially Owned Properties	10,609,000
Company equity/General and Limited Partners' Capital	222,715,000
Total equity/capital	233,324,000
Total liabilities and equity/capital	539,009,000
Partially Owned Property Income Statement Schedule
Operating revenue	90,634,000
Operating Expenses	21,647,000
Net operating income	68,987,000
Property management	3,190,000
General and administrative/other	328,000
Depreciation	20,764,000
Operating income	44,705,000
Interest and other income	53,000
Other expenses	(8,000)
Interest:
Expense incurred, net	(13,857,000)
Amortization of deferred financing costs	(345,000)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	30,548,000
Income and other tax (expense) benefit	(73,000)
Income (loss) from investments in unconsolidated entities	(1,439,000)
Net income	$ 29,036,000
Unconsolidated Non-VIE
Partially Owned Property Balance Sheet Schedule
Properties	2
Apartment Units	945
ASSETS
Investment in real estate	$ 235,821,000
Accumulated depreciation	(32,881,000)
Investment in real estate, net	202,940,000
Cash and cash equivalents	5,287,000
Investments in unconsolidated entities	0
Deposits – restricted	262,000
Other assets	157,000
Total assets	208,646,000
LIABILITIES AND EQUITY
Secured Debt	145,424,000
Accounts payable and accrued expenses	189,000
Accrued interest payable	691,000
Other liabilities	268,000
Security deposits	493,000
Total liabilities	147,065,000
Partially Owned Properties	59,115,000
Company equity/General and Limited Partners' Capital	2,466,000
Total equity/capital	61,581,000
Total liabilities and equity/capital	208,646,000
Partially Owned Property Income Statement Schedule
Operating revenue	26,615,000
Operating Expenses	9,088,000
Net operating income	17,527,000
Property management	776,000
General and administrative/other	2,000
Depreciation	10,510,000
Operating income	6,239,000
Interest and other income	0
Other expenses	0
Interest:
Expense incurred, net	(8,289,000)
Amortization of deferred financing costs	(1,000)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	(2,051,000)
Income and other tax (expense) benefit	(13,000)
Income (loss) from investments in unconsolidated entities	0
Net income	(2,064,000)
Unconsolidated Non-VIE | Legacy JV [Domain]
Investments In Partially Owned Entities (Textuals) [Abstract]
Liquidation Value Preferred Interests	39,900,000
Unconsolidated Non-VIE | Residual JV [Domain]
ASSETS
Investments in unconsolidated entities	$ 1,100,000				$ 147,600,000
Investments In Partially Owned Entities (Textuals) [Abstract]
Business Acquisition, Percentage of Voting Interests Acquired	60.00%
Unconsolidated VIE
Partially Owned Property Balance Sheet Schedule
Properties	0
Apartment Units	0
ASSETS
Investment in real estate	$ 172,995,000
Accumulated depreciation	(44,544,000)
Investment in real estate, net	128,451,000
Cash and cash equivalents	47,000
Investments in unconsolidated entities	0
Deposits – restricted	0
Other assets	334,000
Total assets	128,832,000
LIABILITIES AND EQUITY
Secured Debt	0
Accounts payable and accrued expenses	135,000
Accrued interest payable	0
Other liabilities	70,000
Security deposits	0
Total liabilities	205,000
Partially Owned Properties	86,120,000
Company equity/General and Limited Partners' Capital	42,507,000
Total equity/capital	128,627,000
Total liabilities and equity/capital	128,832,000
Partially Owned Property Income Statement Schedule
Operating revenue	5,214,000
Operating Expenses	2,023,000
Net operating income	3,191,000
Property management	75,000
General and administrative/other	81,000
Depreciation	5,501,000
Operating income	(2,466,000)
Interest and other income	0
Other expenses	0
Interest:
Expense incurred, net	0
Amortization of deferred financing costs	0
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	(2,466,000)
Income and other tax (expense) benefit	0
Income (loss) from investments in unconsolidated entities	0
Net income	$ (2,466,000)
Partially Owned Properties – Consolidated
Partially Owned Property Balance Sheet Schedule
Properties	17
Apartment Units	3,215
Investments In Partially Owned Entities (Textuals) [Abstract]
Disposed Properties	2
Apartment Units	556
Net gain on sales of real estate properties	$ 54,300,000
Partially Owned Properties – Unconsolidated
Partially Owned Property Balance Sheet Schedule
Properties	2
Apartment Units	945
ASSETS
Investment in real estate	$ 408,816,000
Accumulated depreciation	(77,425,000)
Investment in real estate, net	331,391,000
Cash and cash equivalents	5,334,000
Investments in unconsolidated entities	0
Deposits – restricted	262,000
Other assets	491,000
Total assets	337,478,000
LIABILITIES AND EQUITY
Secured Debt	145,424,000
Accounts payable and accrued expenses	324,000
Accrued interest payable	691,000
Other liabilities	338,000
Security deposits	493,000
Total liabilities	147,270,000
Partially Owned Properties	145,235,000
Company equity/General and Limited Partners' Capital	44,973,000
Total equity/capital	190,208,000
Total liabilities and equity/capital	337,478,000
Partially Owned Property Income Statement Schedule
Operating revenue	31,829,000
Operating Expenses	11,111,000
Net operating income	20,718,000
Property management	851,000
General and administrative/other	83,000
Depreciation	16,011,000
Operating income	3,773,000
Interest and other income	0
Other expenses	0
Interest:
Expense incurred, net	(8,289,000)
Amortization of deferred financing costs	(1,000)
Income before income and other taxes, income (loss) from investments in unconsolidated entities, net gain (loss) on sales of real estate properties and land parcels and discontinued operations	(4,517,000)
Income and other tax (expense) benefit	(13,000)
Income (loss) from investments in unconsolidated entities	0
Net income	$ (4,530,000)
Investments In Partially Owned Entities (Textuals) [Abstract]
Disposed Properties	1
Apartment Units	336
Net gain on sales of real estate properties	$ 8,900,000

Operating Properties (Details)

Operating Properties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Properties	302
Apartment Units	77,458
Investments in unconsolidated entities	$ 60,141	$ 68,101
Secured Debt	$ 4,119,181	$ 4,685,134
Consolidated VIE
Variable Interest Entity [Line Items]
Properties	17
Apartment Units	3,215
Investments in unconsolidated entities	$ 46,908
Secured Debt	$ 301,110
Unconsolidated VIE
Variable Interest Entity [Line Items]
Properties	0
Apartment Units	0
Investments in unconsolidated entities	$ 0
Secured Debt	$ 0
Operating Property [Member] | Consolidated VIE
Variable Interest Entity [Line Items]
Properties	16
Apartment Units	2,783
Wisconsin Place [Domain] | Consolidated VIE
Variable Interest Entity [Line Items]
Apartment Units	432
Business Acquisition, Percentage of Voting Interests Acquired	75.00%
Basis of joint venture	$ 170,800
Wisconsin Place [Domain] | Unconsolidated VIE
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 46,900
Nexus Sawgrass [Member]
Variable Interest Entity [Line Items]
Apartment Units	501
Investments in unconsolidated entities	$ 5,000
Equity Method Investment, Ownership Percentage	20.00%
Secured Debt	$ 48,600
Debt Instrument, Interest Rate, Stated Percentage	5.60%
Debt Instrument, Maturity Date	Jan. 1, 2021
Domain [Member]
Variable Interest Entity [Line Items]
Apartment Units	444
Investments in unconsolidated entities	$ 9,300
Equity Method Investment, Ownership Percentage	20.00%
Secured Debt	$ 96,800
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Debt Instrument, Maturity Date	Jan. 1, 2022

Investments in Partially Owne65

Investments in Partially Owned Other (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Feb. 27, 2013
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 60,141	$ 68,101
Unconsolidated Non-VIE
Variable Interest Entity [Line Items]
Investments in unconsolidated entities	$ 0
Unconsolidated Non-VIE | Residual JV [Domain]
Variable Interest Entity [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	60.00%
Joint Venture Partner Ownership Percentage	40.00%
Investments in unconsolidated entities	$ 1,100		$ 147,600
Unconsolidated Non-VIE | Legacy JV [Domain]
Variable Interest Entity [Line Items]
Liquidation Value Preferred Interests	$ 39,900

Deposits - Restricted (Details)

Deposits - Restricted (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Tax Deferred Exchange Proceeds	$ 38,847	$ 0
Earnest Money Deposits	0	1,000
Restricted deposits on real estate investments	733	6,077
Resident security and utility deposits	37,007	48,458
Other	359	358
Totals	76,946	55,893
Real estate taxes and insurance	2,003	1,977
Replacement Reserve Escrow	3,428	3,962
Mortgage principal reserves/sinking funds	58,652	50,155
Other	852	852
Totals	$ 64,935	$ 56,946

Debt Mortgage Notes Payable (De

Debt Mortgage Notes Payable (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)property	Dec. 31, 2015USD ($)property
Debt Instrument [Line Items]
Mortgage notes payable	$ 4,119,181	$ 4,685,134
Noncash or Part Noncash Acquisition, Debt Assumed	$ 43,400
Properties acquired | property	4	4
Historical cost, net of accumulated depreciation, of encumbered properties	$ 5,000,000	$ 6,000,000
Mortgages [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 8,500
Properties acquired | property	1
Write off of Deferred Debt Issuance Cost	$ 1,600	600
Write off unamortized (premium) discount	$ 20,700	$ 1,400
Debt Instrument, Maturity Date	May 28, 2061	May 28, 2061
Weighted Average Mortgage Debt Interest Rate	4.34%	4.23%
Bonds [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 65,500
Prepayment penalty charges	200
Conventional Mortgage Loan [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	75,900
Prepayment penalty charges	2,200
Mortgage Loan - Floating Rate [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	900
Credit enhanced debt [Member]
Debt Instrument [Line Items]
Mortgage notes payable	601,900	$ 668,800
Fannie Mae Pool 3 [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 440,800	$ 368,500
Debt Instrument, Interest Rate, Stated Percentage	6.256%
Prepayment penalty charges	$ 29,300
Minimum [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.10%	0.01%
Maximum [Member] | Mortgages [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.20%	7.25%

Debt Notes (Details)

Debt Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Proceeds from Issuance of Unsecured Debt			$ 750,000
Repayments of Notes Payable	$ 1,500,000	$ 300,000	$ 1,250,000
Summary of Company's unsecured note balances and certain interest rate and maturity date information
Notes, net	4,848,079	5,848,956
Fixed Rate Public or Private Notes [Member]
Summary of Company's unsecured note balances and certain interest rate and maturity date information
Notes, net	$ 4,397,829	$ 5,397,552
Weighted Average Interest Rate	4.90%	5.30%
Debt Instrument, Maturity Date Range, Start	Jan. 1, 2017	Jan. 1, 2016
Debt Instrument, Maturity Date Range, End	Dec. 31, 2045	Dec. 31, 2045
Floating Rate Public or Private Notes [Member]
Summary of Company's unsecured note balances and certain interest rate and maturity date information
Notes, net	$ 450,250	$ 451,404
Weighted Average Interest Rate	1.28%	0.93%
Debt Instrument, Maturity Date Range, Start	Jan. 1, 2019	Jan. 1, 2019
Debt Instrument, Maturity Date Range, End	Dec. 31, 2019	Dec. 31, 2019
2.375% Notes [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Unsecured Debt	$ 450,000
Debt Instrument, Interest Rate, Stated Percentage	2.375%
Debt Instrument, Basis Spread on Variable Rate	0.61%
5.125% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.125%
Repayments of Notes Payable	$ 228,900
Prepayment penalty charges	$ 1,400
5.375% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.375%
Repayments of Notes Payable	$ 400,000
Prepayment penalty charges	$ 9,500
5.750% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Repayments of Notes Payable	$ 255,900
Prepayment penalty charges	$ 16,500
7.125% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.125%
Repayments of Notes Payable	$ 46,100
Prepayment penalty charges	$ 4,600
4.625% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.625%
Repayments of Notes Payable	$ 250,000
Prepayment penalty charges	$ 31,600
7.570% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.57%
Repayments of Notes Payable	$ 48,000
Prepayment penalty charges	19,300
2.85% Notes [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Unsecured Debt	$ 500,000
Debt Instrument, Interest Rate, Stated Percentage	2.85%
Proceeds from Debt, Net of Issuance Costs	$ 496,700
Debt Instrument, Interest Rate, Effective Percentage	3.10%
Unsecured Debt [Member]
Debt Instrument [Line Items]
Write off of Deferred Debt Issuance Cost	$ 1,900
Write off unamortized (premium) discount	25,200
6.584% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.584%
Repayments of Notes Payable		$ 300,000
3.375% Notes [Member] [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Unsecured Debt	$ 450,000	$ 450,000
Debt Instrument, Interest Rate, Stated Percentage		3.375%
Proceeds from Debt, Net of Issuance Costs		$ 447,500
Debt Instrument, Interest Rate, Effective Percentage		3.81%
4.50% Notes [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Unsecured Debt		$ 300,000
Debt Instrument, Interest Rate, Stated Percentage		4.50%
Proceeds from Debt, Net of Issuance Costs		$ 298,900
Debt Instrument, Interest Rate, Effective Percentage		4.55%
Paid at Maturity [Member] | 5.125% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.125%
Repayments of Notes Payable	$ 271,100
London Interbank Offered Rate (LIBOR) [Member] | 2.375% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 0.61%
Minimum [Member] | Fixed Rate Public or Private Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.85%	3.00%
Maximum [Member] | Fixed Rate Public or Private Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.57%	7.57%

Debt Line of Credit and Commerc

Debt Line of Credit and Commercial Paper (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Unamortized Discount	$ 66,752
A 250 billion LOC [Member] [Domain]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	$ 2,500,000	$ 2,500,000
Debt Instrument, Maturity Date	Apr. 2, 2018
ability to increase LOC facility	$ 500,000
Debt Instrument, Basis Spread on Variable Rate	0.95%
Line Of Credit Facility Commitment Fee	15
Write off of Deferred Debt Issuance Cost	$ 400
Remaining borrowing capacity		2,070,000
Amount restricted/dedicated to support letters of credit		$ 45,100
Weighted average interest rate on revolving letter of credit		1.07%
200 billion LOC [Domain]
Line of Credit Facility [Line Items]
Unsecured revolving credit facility	$ 2,000,000
Debt Instrument, Maturity Date	Jan. 10, 2022
ability to increase LOC facility	$ 750,000
Debt Instrument, Basis Spread on Variable Rate		0.00%
Line Of Credit Facility Commitment Fee	12.5
Remaining borrowing capacity	$ 1,960,000
Amount restricted/dedicated to support letters of credit	20,600
Weighted average interest rate on revolving letter of credit		1.37%
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Commercial paper, maximum borrowing capacity	500,000
Commercial Paper, net	20,000	$ 387,300
commercial paper principal outstanding	$ 20,000	387,500
Unamortized Discount		$ 200
Weighted Average Interest Rate Commercial Paper	0.90%	0.56%
Commercial Paper Weighted average days outstanding	4 days	19 days
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | A 250 billion LOC [Member] [Domain]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 0.95%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member] | 200 billion LOC [Domain]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 0.825%

Debt Other (Details)

Debt Other (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 628,458
Long-term Debt, Maturities, Repayments of Principal in Year Two	184,369
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,286,037
Long-term Debt, Maturities, Repayments of Principal in Year Four	1,690,090
Long-term Debt, Maturities, Repayments of Principal in Year Five	941,157
Long-term Debt, Maturities, Repayments of Principal after Year Five	4,366,516
Deferred financing costs	(42,617)	$ 0
Debt Instrument, Unamortized Discount	(66,752)
Total Secured and Unsecured Debt	$ 8,987,258

Derivative and Other Fair Val71

Derivative and Other Fair Value Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Derivative [Line Items]
Proceeds from Issuance of Unsecured Debt		$ 750,000
2.375% Notes [Member]
Derivative [Line Items]
Proceeds from Issuance of Unsecured Debt	$ 450,000
Debt Instrument, Interest Rate, Stated Percentage	2.375%
Debt Instrument, Maturity Date	Jul. 1, 2019
Debt Instrument, Basis Spread on Variable Rate	0.61%
London Interbank Offered Rate (LIBOR) [Member] | 2.375% Notes [Member]
Derivative [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 0.61%
Fair Value Hedging [Member]
Derivative [Line Items]
Current Notional Balance	$ 450,000
Derivative, Fixed Interest Rate	2.375%
Maturity Date	2,019

Derivative and Other Fair Val72

Derivative and Other Fair Value Instruments (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Fair Value Of Serp Investments	$ 124,420	$ 105,942
Assets, Fair Value Disclosure	126,277	109,597
Other Liabilities, Fair Value Disclosure	124,420	105,942
Liabilities, Fair Value Disclosure	124,420	106,615
Redeemable Noncontrolling Interests – Operating Partnership	442,092	566,783	$ 500,733	$ 363,144
Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of Serp Investments	124,420	105,942
Assets, Fair Value Disclosure	124,420	105,942
Other Liabilities, Fair Value Disclosure	124,420	105,942
Liabilities, Fair Value Disclosure	124,420	105,942
Redeemable Noncontrolling Interests – Operating Partnership	0	0
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of Serp Investments	0	0
Assets, Fair Value Disclosure	1,857	3,655
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	673
Redeemable Noncontrolling Interests – Operating Partnership	442,092	566,783
Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Fair Value Of Serp Investments	0	0
Assets, Fair Value Disclosure	0	0
Other Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Redeemable Noncontrolling Interests – Operating Partnership	0	0
Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	1,857	3,655
Fair Value Hedging [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	0	0
Fair Value Hedging [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	1,857	3,655
Fair Value Hedging [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 0	0
Forward Starting Swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value		673
Forward Starting Swaps [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value		0
Forward Starting Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value		673
Forward Starting Swaps [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Derivative liability, fair value		$ 0

Derivative and Other Fair Val73

Derivative and Other Fair Value Instruments (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	$ (1,798)	$ 2,058	$ 1,597
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	1,798	(2,058)	(1,597)
Ineffective Portion - Amount of Gain/ (Loss) Reclassifed from Accumulated OCI into Income		3,000	(100)
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	$ (1,798)	$ 2,058	$ 1,597
Derivative, Description of Hedged Item	Fixed rate debt	Fixed rate debt	Fixed rate debt
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	$ 1,798	$ (2,058)	$ (1,597)
Forward Starting Swaps/Treasury Locks [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(3,989)	(814)	(33,215)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(41,758)	(18,244)	(16,868)
Ineffective Portion - Amount of Gain/ (Loss) Reclassifed from Accumulated OCI into Income	$ (74)	$ (3,033)	$ 91

Derivative and Other Fair Val74

Derivative and Other Fair Value Instruments (Details Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Mortgage notes payable	$ 4,119,181,000	$ 4,685,134,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	(113,900,000)	(151,800,000)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	21,900,000
Payments for (Proceeds from) Hedge, Investing Activities			$ 2,000,000
Proceeds from Issuance of Unsecured Debt			750,000,000
Interest Expense			1,300,000
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		3,000,000	(100,000)
Charges Hedge Termination Activities			$ 800,000
2.85% Notes [Member]
Derivative [Line Items]
Payments for (Proceeds from) Hedge, Investing Activities	4,700,000
Proceeds from Issuance of Unsecured Debt	500,000,000
Interest Expense	9,000
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	(74,000)
Charges Hedge Termination Activities	4,600,000
3.375% Notes [Member] [Member]
Derivative [Line Items]
Payments for (Proceeds from) Hedge, Investing Activities		15,100,000
Proceeds from Issuance of Unsecured Debt	450,000,000	450,000,000
Interest Expense		1,200,000
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		(30,000)
Charges Hedge Termination Activities		13,900,000
Secured Debt [Member]
Derivative [Line Items]
Mortgage notes payable	4,100,000,000	4,700,000,000
Debt Instrument, Fair Value Disclosure	4,200,000,000	4,600,000,000
Unsecured Debt [Member]
Derivative [Line Items]
Notes, net	4,900,000,000	6,200,000,000
Debt Instrument, Fair Value Disclosure	$ 5,000,000,000	$ 6,500,000,000

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) from continuing operations	$ 4,479,586	$ 907,621	$ 657,101
Income (Loss) Attributable to Noncontrolling Interest	(171,491)	(34,226)	(24,771)
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Preferred distributions	(3,091)	(3,357)	(4,145)
Preferred Stock Redemption Premium	0	(3,486)	0
Income from continuing operations available to Common Shares, net of Noncontrolling Interests	4,288,574	862,895	625,641
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	498	382	1,522
Numerator for net income per share – basic	4,289,072	863,277	627,163
Income From Continuing Operations Available To Common Shares	4,460,065	897,121	650,412
Discontinued operations, net	518	397	1,582
Net Income (Loss) Available to Common Stockholders, Diluted	$ 4,460,583	$ 897,518	$ 651,994
Weighted average Common Shares outstanding	365,002	363,498	361,181
Dilutive Op Units	13,827	13,576	13,718
Dilutive Securities Options	3,163	3,546	2,836
Weighted average Common Shares outstanding	381,992	380,620	377,735
Earnings Per Share, Basic	$ 11.75	$ 2.37	$ 1.74
Earnings Per Share, Diluted	11.68	2.36	1.73
Income from continuing operations available to Common Shares	11.75	2.37	1.73
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0	0.01
Income from continuing operations available to Common Shares	11.68	2.36	1.72
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0	$ 0	$ 0.01
ERPOP [Member]
Income (loss) from continuing operations	$ 4,479,586	$ 907,621	$ 657,101
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Preferred Stock Redemption Premium	0	(3,486)	0
Discontinued operations, net	$ 518	$ 397	$ 1,582
Dilutive Securities Options	3,163	3,546	2,836
Weighted average Common Shares outstanding	381,992	380,620	377,735
Earnings Per Share, Basic	$ 11.75	$ 2.37	$ 1.74
Earnings Per Share, Diluted	11.68	2.36	1.73
Income from continuing operations available to Common Shares	11.75	2.37	1.73
Income from continuing operations available to Common Shares	$ 11.68	$ 2.36	$ 1.72
Allocation to Preference Units	$ (3,091)	$ (3,357)	$ (4,145)
Income Loss From Continuing Operations Available To Units	4,460,065	897,121	650,412
Numerator for net income per Unit – basic and diluted	$ 4,460,583	$ 897,518	$ 651,994
Weighted Average Limited Partnership and General Partnership Units Outstanding, Basic	378,829	377,074	374,899
Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership and General Partnership Unit, Basic	$ 0	$ 0	$ 0.01
Income Loss From Discontinued Operations Net Of Tax Per Outstanding Limited Partnership And General Partnership net Diluted	$ 0	$ 0	$ 0.01

Individually Significant Dispos

Individually Significant Dispositions and Discontinued Operations Individually Significant Dispositions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Total revenues	2,425,800	2,744,965	2,614,748
EXPENSES (1)
Property and maintenance	406,823	479,160	473,098
Real estate taxes and insurance	317,387	339,802	325,401
Property management	82,015	86,206	85,065
General and administrative	57,840	64,664	50,679
Depreciation	705,649	765,895	758,861
Total expenses	1,569,714	1,735,727	1,693,104
Operating income	856,086	1,009,238	921,644
Interest and other income	65,773	7,372	4,462
Other expenses	(10,368)	(2,942)	(9,073)
Interest (2):
Expense incurred, net	(482,246)	(444,487)	(457,460)
Amortization of deferred financing costs	(12,633)	(10,801)	(11,088)
Income and other tax (expense) benefit	(1,613)	(917)	(1,394)
Net gain on sales of real estate properties	4,044,055	335,134	212,685
Net income	4,480,104	908,018	658,683
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	(16,430)	(3,657)	(2,544)
Net Income (Loss) Attributable to Noncontrolling Interest	(171,511)	(34,241)	(24,831)
Net income attributable to controlling interests	$ 4,292,163	$ 870,120	$ 631,308
Starwood Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of consolidated NOI	1.20%	15.70%	15.40%
REVENUES
Rental income	$ 30,785	$ 427,433	$ 401,134
Total revenues	30,785	427,433	401,134
EXPENSES (1)
Property and maintenance	7,838	78,189	76,579
Real estate taxes and insurance	2,912	48,403	46,416
Property management	2	11	11
General and administrative	23	38	24
Depreciation	0	87,616	104,104
Total expenses	10,775	214,257	227,134
Operating income	20,010	213,176	174,000
Interest and other income	21	1	1
Other expenses	0	(35)	(1)
Interest (2):
Expense incurred, net	(380)	(680)	(701)
Amortization of deferred financing costs	(707)	(559)	(98)
Income and other tax (expense) benefit	(1)	(1)	(3)
Net gain on sales of real estate properties	3,161,097	0	0
Net income	3,180,040	211,902	173,198
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties	0	0	(14)
Net income available to Units – General Partner	3,180,040	211,902	173,184
Net Income (Loss) Attributable to Noncontrolling Interest	(122,152)	(8,083)	(6,598)
Net income attributable to controlling interests	$ 3,057,888	$ 203,819	$ 166,586

Discontinued Operations (Detail

Discontinued Operations (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
REVENUES
Disposal Group, Including Discontinued Operation, Rental Income		$ 355	$ 499	$ 1,309
Disposal Group, Including Discontinued Operation, Revenue		355	499	1,309
EXPENSES (1)
Disposal Group Including Discontinued Operation Property And Maintenance	[1]	(46)	(60)	(141)
Disposal Group Including Discontinued Operation Real Estate Taxes And Insurance	[1]	(461)	65	267
Disposal Group, Including Discontinued Operation, General and Administrative Expense	[1]	119	85	89
Disposal Group, Including Discontinued Operation, Operating Expense	[1]	(388)	90	215
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		743	409	1,094
Disposal Group Including Discontinued Operation Interest And Other Income		24	3	317
Disposal Group Including Discontinued Operation Other Expenses		(280)	0	0
Discontinued Operation, Tax Effect of Discontinued Operation		(12)	(15)	(8)
Income Loss From Discontinued Operations		475	397	1,403
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		43	0	179
Discontinued operations, net		$ 518	$ 397	$ 1,582
[1]	(1)Includes expenses paid in the current period for properties sold in prior periods related to the Company’s period of ownership.

Share Incentive Plans (Details)

Share Incentive Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	12,980,741
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	8,595,553
Compensation information
Compensation Expense	$ 30,530	$ 34,607	$ 27,543
Compensation Capitalized	2,726	2,948	2,538
Restricted Units In-Lieu of Bonus (1)	4,022	3,654
Compensation Equity	37,278	41,209	30,081
Dividends Incurred	14,256	2,779	2,260
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 8,600
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 3 months 21 days
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	14,725,321
Restricted Shares [Member]
Compensation information
Compensation Expense	$ 13,539	13,755	9,244
Compensation Capitalized	1,477	1,311	660
Restricted Units In-Lieu of Bonus (1)	0	0
Compensation Equity	15,016	15,066	9,904
Dividends Incurred	6,494	1,160	1,012
Restricted Stock Units (RSUs) [Member]
Compensation information
Compensation Expense	13,567	17,311	11,049
Compensation Capitalized	591	538	920
Restricted Units In-Lieu of Bonus (1)	4,022	3,654
Compensation Equity	18,180	21,503	11,969
Dividends Incurred	7,762	1,619	1,248
Employee Stock Option [Member]
Compensation information
Compensation Expense	2,839	2,746	6,453
Compensation Capitalized	593	1,010	896
Restricted Units In-Lieu of Bonus (1)	0	0
Compensation Equity	3,432	3,756	7,349
Dividends Incurred	0	0	0
Employee Share Purchase Plan Discount [Member]
Compensation information
Compensation Expense	585	795	797
Compensation Capitalized	65	89	62
Restricted Units In-Lieu of Bonus (1)	0	0
Compensation Equity	650	884	859
Dividends Incurred	$ 0	$ 0	$ 0

Award Activity of the Share Inc

Award Activity of the Share Incentive Plans - USD ($) $ / shares in Units, $ in Millions	Oct. 14, 2016	Mar. 10, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Special Dividend Adjustment			960,986
Conversion of restricted shares to restricted units			0	(1,284)	(12,146)
Weighted average grant date fair value for Options			$ 13.02	$ 13.68	$ 9.12
Distributions declared per Common Share outstanding			13.015	$ 2.210	$ 2
Starwood Portfolio [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Distributions declared per Common Share outstanding	$ 3	$ 8	$ 11
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			5,734,365	7,030,620	8,470,532
Common Shares Subject to Options, Awards granted			154,016	171,150	667,877
Stock Options Exercised			(815,044)	(1,456,363)	(2,086,380)
Common Shares Subject to Options, Awards forfeited			(10,512)	(9,550)	(19,022)
Common Shares Subject to Options, Awards expired			(710)	(1,492)	(2,387)
Common Shares Subject to Options, Ending Balance			6,023,101	5,734,365	7,030,620
Weighted Average Exercise Price per option, Beginning Balance			$ 48.04	$ 46.16	$ 43.67
Weighted Average Exercise Price per option, Awards granted			64.99	80.15	56.72
Weighted Average Exercise Price per option, Awards exercised/vested			38.01	42.64	39.34
Weighted Average Exercise Price per option, Awards forfeited			63.43	64.53	56.32
Weighted Average Exercise Price per option, Awards expired			68.40	39.86	55.24
Weighted Average Exercise Price per option, Ending Balance			42.05	48.04	46.16
Weighted average grant date fair value for Options			$ 11.09	$ 13.67	$ 9.21
Intrinsic value of options exercised			$ 26.2	$ 52.9	$ 50.8
Restricted Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Restricted Shares, Beginning Balance			522,150	482,466	500,234
Restricted Shares, Awards granted			154,296	174,112	176,457
Restricted share grants vested			(217,805)	(127,174)	(175,344)
Restricted Shares, Awards forfeited			(6,607)	(5,970)	(6,735)
Restricted Shares, Awards Expired			0	0	0
Conversion of restricted shares to restricted units				(1,284)	(12,146)
Restricted Shares, Ending Balance			452,034	522,150	482,466
Weighted Average Fair Value per Restricted Share, Beginning Balance			$ 63.67	$ 56.89	$ 55.79
Weighted Average Fair Value per Restricted Share, Awards granted			75.19	79.65	56.56
Weighted Average Fair Value per Restricted Share, Awards exercised/vested			57.75	60.21	53.44
Weighted Average Fair Value per Restricted Share, Awards forfeited			70.73	62.11	56.57
Weighted Average Fair Value per Restricted Share, Awards Expired			0	0	0
Weighted Average Fair Value per Restricted Share, Ending Balance			$ 70.35	$ 63.67	$ 56.89
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value			$ 15.6	$ 10.2	$ 10.2
Restricted Stock Units (RSUs) [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Conversion of restricted shares to restricted units				1,284	12,146
Restricted Units, Beginning Balance			888,725	623,948	471,256
Restricted Units, Awards Granted			289,273	337,505	201,507
Restricted Units, Awards exercised/vested			(374,217)	(72,003)	(60,294)
Restricted Units, Awards forfeited			(1,524)	(2,009)	(667)
Restricted Units, Awards Expired			0	0	0
Restricted Units, Ending Balance			802,257	888,725	623,948
Weighted Average Fair Value per Restricted Unit, Beginning Balance			$ 63.91	$ 53.38	$ 55.67
Weighted Average Fair Value per Restricted Unit, Awards granted			81.05	81.87	53.82
Weighted Average Fair Value per Restricted Unit, Awards exercised/vested			52.73	57.12	53.71
Weighted Average Fair Value per Restricted Unit, Awards forfeited			86.35	64.39	52.08
Weighted Average Fair Value per Restricted Unit, Awards Expired			0	0	0
Weighted Average Fair Value per Restricted Unit, Ending Balance			$ 75.26	$ 63.91	$ 53.38
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value			$ 27.2	$ 5.8	$ 3.4

Options Outstanding and Exercis

Options Outstanding and Exercisable - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Information regarding options outstanding and exercisable
Options Outstanding, Options	6,023,101
Options Outstanding, Weighted Average Remaining Contractual Life in Years	4 years 7 months 29 days
Options Outstanding, Weighted Average Exercise Price	$ 42.05
Options Exercisable, Options	5,610,677
Options Exercisable, Weighted Average Exercise Price	$ 40.91
Options, Vested and expected to vest	6,003,870
Options, Weighted Average Remaining Contractual Life in Years	4 years 6 months 20 days
Options, Weighted Average Exercise Price	$ 41.97
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	19.67
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 68.55
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	$ 135.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 132
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4 years 4 months 26 days
Market value of common shares	$ 64.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		4,436,990	5,011,784
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price		$ 45.11	$ 42.18
Exercise Price Range One [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	892,111
Options Outstanding, Weighted Average Remaining Contractual Life in Years	2 years 1 month 7 days
Options Outstanding, Weighted Average Exercise Price	$ 19.67
Options Exercisable, Options	892,111
Options Exercisable, Weighted Average Exercise Price	$ 19.67
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	19.67
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 24.93
Exercise Price Range Two [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	930,884
Options Outstanding, Weighted Average Remaining Contractual Life in Years	2 years 6 months 15 days
Options Outstanding, Weighted Average Exercise Price	$ 29.42
Options Exercisable, Options	930,884
Options Exercisable, Weighted Average Exercise Price	$ 29.42
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	24.94
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 37.39
Exercise Price Range Three [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	2,412
Options Outstanding, Weighted Average Remaining Contractual Life in Years	3 years 10 months
Options Outstanding, Weighted Average Exercise Price	$ 41.44
Options Exercisable, Options	2,412
Options Exercisable, Weighted Average Exercise Price	$ 41.44
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	37.40
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 43.62
Exercise Price Range Four [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	2,715,880
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 6 months
Options Outstanding, Weighted Average Exercise Price	$ 46.59
Options Exercisable, Options	2,515,401
Options Exercisable, Weighted Average Exercise Price	$ 46.47
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	43.63
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 49.86
Exercise Price Range Five [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	1,114,654
Options Outstanding, Weighted Average Remaining Contractual Life in Years	5 years 1 month 28 days
Options Outstanding, Weighted Average Exercise Price	$ 51.30
Options Exercisable, Options	1,114,654
Options Exercisable, Weighted Average Exercise Price	$ 51.30
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	49.87
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 56.09
Exercise Price Range Six [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	2,761
Options Outstanding, Weighted Average Remaining Contractual Life in Years	8 years 5 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 60.80
Options Exercisable, Options	2,761
Options Exercisable, Weighted Average Exercise Price	$ 60.80
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	56.10
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 62.32
Exercise Price Range Seven [Member]
Information regarding options outstanding and exercisable
Options Outstanding, Options	364,399
Options Outstanding, Weighted Average Remaining Contractual Life in Years	8 years 6 months 27 days
Options Outstanding, Weighted Average Exercise Price	$ 66.77
Options Exercisable, Options	152,454
Options Exercisable, Weighted Average Exercise Price	$ 67.27
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	62.33
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 68.55

Employee Plans (Details)

Employee Plans (Details)	12 Months Ended
	Dec. 31, 2016USD ($)$ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013
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 | shares	7,000,000
Common Shares available for purchase under the ESPP | shares	2,906,163
Purchase price of common stock	85.00%
Summary of information regarding the Common Shares issued under the ESPP
Shares issued | shares	63,909	68,462	68,807
Employee Share Purchase Plan Issuance Price Minimum | $ / shares	$ 51.85	$ 63.70	$ 45.90
Employee Share Purchase Plan Issuance Price Maximum | $ / shares	$ 63.37	$ 65.90	$ 55.95
Issuance proceeds | $	$ 3,686,000	$ 4,404,000	$ 3,392,000
Maximum eligible compensation percentage for the defined contribution plan (the 401(k) Plan)	4.00%			3.00%
Defined contribution plan vesting period	5
Defined contribution plan, compensation expense | $	$ 4,900,000	$ 5,500,000	$ 5,200,000
Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain]
Summary of information regarding the Common Shares issued under the ESPP
Maximum eligible compensation percentage for the defined contribution plan (the 401(k) Plan)	3.00%

Distribution Reinvestment and82

Distribution Reinvestment and Share Purchase Plan (Details)	Dec. 31, 2016shares
Common Shares registered with Distribution Reinvestment and Share Purchase Plan (2011 DRIP)	4,850,000
Number of shares available for issuance	4,704,608
Distribution Reinvestment Plan 2014 [Member]
Common Shares registered with Distribution Reinvestment and Share Purchase Plan (2011 DRIP)	4,790,000

Transactions With Related Par83

Transactions With Related Parties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Amount Incurred For leased office space	$ 2.7	$ 2.6	$ 2.5

Commitments and Contingencies84

Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Accrual for Environmental Loss Contingencies	$ 4,700,000
Litigation Settlement, Amount	3,200,000	$ 6,000,000	$ 2,800,000
Loss Contingency Accrual, Payments	1,500,000
Loss Contingency Accrual, Period Increase (Decrease)	(500,000)
Loss Contingency Accrual	$ 1,000,000
Projects in various stages of development	6
Units in various stages of development	2,064
Consolidated Project Under Development Commitment Fund	$ 260,600,000
Total operating lease payments	26,200,000	24,500,000	21,200,000
Compensation expense, Recognized	300,000	$ 400,000	$ 500,000
Operating Leases:
Minimum Rent Payments Due, Year 1	(15,917,000)
Minimum Rent Payments Due, Year 2	(16,027,000)
Minimum Rent Payments Due, Year 3	(15,890,000)
Minimum Rent Payments Due, Year 4	(15,489,000)
Minimum Rent Payments Due, Year 5	(15,256,000)
Minimum Rent Payments Due, Thereafter	(826,259,000)
Minimum Rent Payments Due, Total	(904,838,000)
Operating Leases, Future Minimum Payments Receivable, Current	73,171,000
Operating Leases, Future Minimum Payments Receivable, in Two Years	60,004,000
Operating Leases, Future Minimum Payments Receivable, in Three Years	54,486,000
Operating Leases, Future Minimum Payments Receivable, in Four Years	50,705,000
Operating Leases, Future Minimum Payments Receivable, in Five Years	46,634,000
Operating Leases, Future Minimum Payments Receivable, Thereafter	211,853,000
Operating Leases, Future Minimum Payments Receivable	496,853,000
Other Long-Term Liabilities:
Deferred Compensation Due, Year 1	(1,387,000)
Deferred Compensation Due, Year 2	(1,723,000)
Deferred Compensation Due, Year 3	(1,128,000)
Deferred Compensation Due, Year 4	(1,079,000)
Deferred Compensation Due, Year 5	(1,079,000)
Deferred Compensation Due, Thereafter	(4,383,000)
Deferred Compensation Due, Total	$ (10,779,000)
Partially Owned Properties – Unconsolidated
Number Of Unconsolidated Projects	2
FHA Lawsuit [Member]
Litigation Settlement, Amount	$ 3,100,000

Reportable Segments (Details)

Reportable Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Reconciliation of NOI
Rental income	$ 2,422,233	$ 2,736,578	$ 2,605,311
Property and maintenance expense	(406,823)	(479,160)	(473,098)
Real estate taxes and insurance expense	(317,387)	(339,802)	(325,401)
Total operating expenses	(724,210)	(818,962)	(798,499)
Net operating income	1,698,023	1,917,616	1,806,812
Rental income:
Rental Income - same store	2,177,304	2,099,166	2,441,390
Rental Income - non-same store	244,929	637,412	163,921
Rental Income	2,422,233	2,736,578	2,605,311
Operating expenses:
Operating Expenses - same store	634,120	613,924	744,096
Operating Expenses - non-same store	90,090	205,038	54,403
Total operating expenses	724,210	818,962	798,499
NOI:
NOI - same store	1,543,184	1,485,242	1,697,294
NOI - non-same store	154,839	432,374	109,518
Net operating income	$ 1,698,023	$ 1,917,616	$ 1,806,812
Units in same store properties	69,879	69,879	96,286
Total Assets	$ 20,704,148	$ 23,110,196
Capital Expenditures	172,177	182,113
Same store (1)
NOI:
Total Assets	16,648,892	17,105,124
Capital Expenditures	156,188	137,331
Non-same store/other (2) (3)
Rental income:
Rental Income - non-same store	163,768	72,123	$ 83,715
Operating expenses:
Operating Expenses - non-same store	56,403	27,078	28,992
NOI:
NOI - non-same store	107,365	45,045	54,723
Total Assets	2,864,250	2,441,637
Capital Expenditures	12,179	6,341
Los Angeles | Same store (1)
Rental income:
Rental Income - same store	368,734	349,285	259,437
Operating expenses:
Operating Expenses - same store	107,138	104,614	81,972
NOI:
NOI - same store	261,596	244,671	177,465
Total Assets	2,513,979	2,586,859
Capital Expenditures	26,195	22,015
San Diego | Same store (1)
Rental income:
Rental Income - same store	88,049	83,491	79,217
Operating expenses:
Operating Expenses - same store	23,489	22,938	22,605
NOI:
NOI - same store	64,560	60,553	56,612
Total Assets	471,937	488,260
Capital Expenditures	5,172	4,608
Orange County | Same store (1)
Rental income:
Rental Income - same store	79,602	75,068	71,440
Operating expenses:
Operating Expenses - same store	18,931	18,550	18,211
NOI:
NOI - same store	60,671	56,518	53,229
Total Assets	260,918	268,479
Capital Expenditures	6,747	7,336
Subtotal - Southern California | Same store (1)
Rental income:
Rental Income - same store	536,385	507,844	410,094
Operating expenses:
Operating Expenses - same store	149,558	146,102	122,788
NOI:
NOI - same store	386,827	361,742	287,306
Total Assets	3,246,834	3,343,598
Capital Expenditures	38,114	33,959
New York | Same store (1)
Rental income:
Rental Income - same store	457,882	450,460	455,598
Operating expenses:
Operating Expenses - same store	160,772	152,682	156,881
NOI:
NOI - same store	297,110	297,778	298,717
Total Assets	4,275,930	4,383,354
Capital Expenditures	25,329	18,170
Washington D.C. | Same store (1)
Rental income:
Rental Income - same store	424,055	417,985	451,973
Operating expenses:
Operating Expenses - same store	126,154	123,450	131,964
NOI:
NOI - same store	297,901	294,535	320,009
Total Assets	3,916,264	4,023,474
Capital Expenditures	33,867	33,455
San Francisco | Same store (1)
Rental income:
Rental Income - same store	365,019	343,089	340,252
Operating expenses:
Operating Expenses - same store	88,141	84,603	96,217
NOI:
NOI - same store	276,878	258,486	244,035
Total Assets	2,441,256	2,506,004
Capital Expenditures	24,411	25,104
Boston | Same store (1)
Rental income:
Rental Income - same store	237,683	232,462	244,612
Operating expenses:
Operating Expenses - same store	66,283	67,252	70,070
NOI:
NOI - same store	171,400	165,210	174,542
Total Assets	1,723,942	1,774,181
Capital Expenditures	20,936	17,355
Seattle | Same store (1)
Rental income:
Rental Income - same store	154,482	145,646	153,197
Operating expenses:
Operating Expenses - same store	42,644	39,307	45,781
NOI:
NOI - same store	111,838	106,339	107,416
Total Assets	1,031,764	1,061,351
Capital Expenditures	13,464	9,106
Other Markets | Same store (1)
Rental income:
Rental Income - same store	1,798	1,680	385,664
Operating expenses:
Operating Expenses - same store	568	528	120,395
NOI:
NOI - same store	1,230	1,152	265,269
Total Assets	12,902	13,162
Capital Expenditures	67	182
Other (3)
NOI:
Total Assets	1,191,006	3,563,435
Capital Expenditures	3,810	38,441
Other (3) | Non-same store/other (2) (3)
Rental income:
Rental Income - non-same store	81,161	565,289	80,206
Operating expenses:
Operating Expenses - non-same store	33,687	177,960	25,411
NOI:
NOI - non-same store	47,474	387,329	$ 54,795
Total Assets	4,055,256	6,005,072
Capital Expenditures	$ 15,989	$ 44,782

Subsequent Events_Other (Detail

Subsequent Events/Other (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Subsequent Event [Line Items]
Other Liabilities	$ 350,466	$ 366,387
Disposed Units	29,776	1,857
Proceeds From Sale Of Property	$ 6,943,458	$ 513,312
Interest and other income	65,773	7,372	$ 4,462
Business Combination, Acquisition Related Costs	1,500	1,000	400
Write-off of pursuit costs	4,092	3,208	3,607
Other Expenses	5,600	4,200	4,000
Litigation Settlement, Amount	$ 3,200	$ 6,000	$ 2,800
Military Housing [Member]
Subsequent Event [Line Items]
Disposed Units	5,161
Proceeds From Sale Of Property	$ 63,300
Interest and other income	52,400
Series P [Domain]
Subsequent Event [Line Items]
Preferred Stock Preference Units Dividend Rate Percentage			3.00%
Liquidation Value Preferred Interests			$ 18,400
Business Acquisition, Percentage of Voting Interests Acquired			95.00%
Redemption of Series P Preference Units	18,400
Other Liabilities	$ 18,400

Quarterly Financial Data (Una87

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unaudited Quarterly Financial Data [Line Items]
Revenues									$ 2,425,800	$ 2,744,965	$ 2,614,748
Operating income									856,086	1,009,238	921,644
Income (loss) from continuing operations									4,479,586	907,621	657,101
Discontinued operations, net									518	397	1,582
Net income									4,480,104	908,018	658,683
Net income available to Common Shares									$ 4,289,072	$ 863,277	$ 627,163
Earnings Per Share, Basic [Abstract]
Net income available to Common Shares									$ 11.75	$ 2.37	$ 1.74
Weighted average Common Shares outstanding									365,002	363,498	361,181
Earnings Per Share, Diluted [Abstract]
Net income available to Common Shares									$ 11.68	$ 2.36	$ 1.73
Weighted average Common Shares outstanding									381,992	380,620	377,735
Scenario, Previously Reported [Member]
Unaudited Quarterly Financial Data [Line Items]
Revenues	$ 605,489	$ 606,074	$ 595,154	$ 619,083	$ 703,193	$ 696,289	$ 679,112	$ 666,371
Operating income	224,070	209,373	206,018	216,625	287,058	257,594	246,255	218,331
Income (loss) from continuing operations	301,987	217,246	228,365	3,731,988	213,673	205,375	298,504	190,069
Discontinued operations, net	394	246	35	(157)	47	81	114	155
Net income	302,381	217,492	228,400	3,731,831	213,720	205,456	298,618	190,224
Net income available to Common Shares	$ 276,477	$ 207,543	$ 218,067	$ 3,586,985	$ 202,989	$ 195,859	$ 285,587	$ 178,842
Earnings Per Share, Basic [Abstract]
Net income available to Common Shares	$ 0.76	$ 0.57	$ 0.60	$ 9.84	$ 0.56	$ 0.54	$ 0.79	$ 0.49
Weighted average Common Shares outstanding	365,256	365,109	365,047	364,592	363,828	363,579	363,476	363,098
Earnings Per Share, Diluted [Abstract]
Net income available to Common Shares	$ 0.75	$ 0.56	$ 0.59	$ 9.76	$ 0.55	$ 0.53	$ 0.78	$ 0.49
Weighted average Common Shares outstanding	381,860	382,373	382,065	382,243	381,220	380,663	380,491	380,327
ERPOP [Member]
Unaudited Quarterly Financial Data [Line Items]
Revenues									$ 2,425,800	$ 2,744,965	$ 2,614,748
Operating income									856,086	1,009,238	921,644
Income (loss) from continuing operations									4,479,586	907,621	657,101
Discontinued operations, net									518	397	1,582
Net income									4,480,104	908,018	658,683
Net income available to Units									$ 4,460,583	$ 897,518	$ 651,994
Earnings Per Share, Basic [Abstract]
Net income available to Common Shares									$ 11.75	$ 2.37	$ 1.74
Weighted average Units outstanding									378,829	377,074	374,899
Earnings Per Share, Diluted [Abstract]
Net income available to Common Shares									$ 11.68	$ 2.36	$ 1.73
Weighted average Common Shares outstanding									381,992	380,620	377,735
ERPOP [Member] | Scenario, Previously Reported [Member]
Unaudited Quarterly Financial Data [Line Items]
Revenues	$ 605,489	$ 606,074	$ 595,154	$ 619,083	$ 703,193	$ 696,289	$ 679,112	$ 666,371
Operating income	224,070	209,373	206,018	216,625	287,058	257,594	246,255	218,331
Income (loss) from continuing operations	301,987	217,246	228,365	3,731,988	213,673	205,375	298,504	190,069
Discontinued operations, net	394	246	35	(157)	47	81	114	155
Net income	302,381	217,492	228,400	3,731,831	213,720	205,456	298,618	190,224
Net income available to Units	$ 287,546	$ 215,896	$ 226,847	$ 3,730,294	$ 211,039	$ 203,637	$ 296,941	$ 185,901
Earnings Per Share, Basic [Abstract]
Net income available to Common Shares	$ 0.76	$ 0.57	$ 0.60	$ 9.84	$ 0.56	$ 0.54	$ 0.79	$ 0.49
Weighted average Units outstanding	379,081	379,008	378,934	378,289	377,380	377,147	377,063	376,696
Earnings Per Share, Diluted [Abstract]
Net income available to Common Shares	$ 0.75	$ 0.56	$ 0.59	$ 9.76	$ 0.55	$ 0.53	$ 0.78	$ 0.49
Weighted average Units outstanding	381,860	382,373	382,065	382,243	381,220	380,663	380,491	380,327

Real Estate and Accumulated D88

Real Estate and Accumulated Depreciation - Overall Summary and Encumbrances Reconciliation (Details)	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2016USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Apartment Units				77,458
Overall summary of real estate and accumulated depreciation
Accumulated Depreciation	$ (6,084,616,000)	$ (5,432,805,000)	$ (4,807,709,000)	$ (5,360,389,000)
Changes in total real estate
Balance, beginning of year	28,542,697,000	27,675,383,000	26,800,948,000
Acquisitions and development	832,803,000	964,645,000	1,121,423,000
Improvements	174,981,000	186,104,000	191,243,000
Dispositions and other	(4,164,056,000)	(283,435,000)	(438,231,000)
Balance, end of year	25,386,425,000	28,542,697,000	27,675,383,000
Changes in accumulated depreciation
Balance, beginning of year	(6,084,616,000)	(5,432,805,000)	(4,807,709,000)
Depreciation	705,649,000	765,895,000	758,861,000
Dispositions and other	(1,429,876,000)	(114,084,000)	(133,765,000)
Balance, end of year	(5,360,389,000)	$ (6,084,616,000)	$ (5,432,805,000)
EQR-Fanwell 2007 LP [Member]
Overall summary of real estate and accumulated depreciation
Encumbrances				$ 299,795,866
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]
Number of Properties Encumbered				4
EQR-Wellfan 2008 LP [Member]
Overall summary of real estate and accumulated depreciation
Encumbrances				$ 549,337,934
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]
Number of Properties Encumbered				10
Archstone Master Property [Domain]
Overall summary of real estate and accumulated depreciation
Encumbrances				$ 796,845,087
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]
Number of Properties Encumbered				13
Portfolio Entity Encumbrances [Member]
Real Estate and Accumulated Depreciation Encumbrances Reconciliation [Abstract]
Number of Properties Encumbered				27
Individual Property Encumbrances [Member]
Overall summary of real estate and accumulated depreciation
Encumbrances				$ 2,473,201,938
Investment in Real Estate - Wholly Owned Unencumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties				204
Units				52,102
Investment in Real Estate, Gross				$ 18,448,319,778
Accumulated Depreciation	(3,651,990,171)			(3,651,990,171)
Investment in Real Estate Net				14,796,329,607
Encumbrances				$ 0
Changes in accumulated depreciation
Balance, end of year	(3,651,990,171)
Investment in Real Estate - Wholly Owned Encumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties				79
Units				21,196
Investment in Real Estate, Gross				$ 6,291,785,512
Accumulated Depreciation	(1,497,361,379)			(1,497,361,379)
Investment in Real Estate Net				4,794,424,133
Encumbrances				$ 3,818,071,013
Changes in accumulated depreciation
Balance, end of year	(1,497,361,379)
Wholly Owned Properties
Overall summary of real estate and accumulated depreciation
Properties				283
Units				73,298
Investment in Real Estate, Gross				$ 24,740,105,290
Accumulated Depreciation	(5,149,351,550)			(5,149,351,550)
Investment in Real Estate Net				19,590,753,740
Encumbrances				$ 3,818,071,013
Changes in accumulated depreciation
Balance, end of year	(5,149,351,550)
Investment in Real Estate - Partially Owned Unencumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties				9
Units				1,527
Investment in Real Estate, Gross				$ 288,230,337
Accumulated Depreciation	(98,826,978)			(98,826,978)
Investment in Real Estate Net				189,403,359
Encumbrances				$ 0
Changes in accumulated depreciation
Balance, end of year	(98,826,978)
Investment in Real Estate - Partially Owned Encumbered [Member]
Overall summary of real estate and accumulated depreciation
Properties				8
Units				1,688
Investment in Real Estate, Gross				$ 358,089,848
Accumulated Depreciation	(112,210,888)			(112,210,888)
Investment in Real Estate Net				245,878,960
Encumbrances				$ 301,109,812
Changes in accumulated depreciation
Balance, end of year	(112,210,888)
NONCONTROLLING INTERESTS – PARTIALLY OWNED PROPERTIES
Overall summary of real estate and accumulated depreciation
Properties				17
Units				3,215
Investment in Real Estate, Gross				$ 646,320,185
Accumulated Depreciation	(211,037,866)			(211,037,866)
Investment in Real Estate Net				435,282,319
Encumbrances				$ 301,109,812
Changes in accumulated depreciation
Balance, end of year	(211,037,866)
Unencumbered Properties [Member]
Overall summary of real estate and accumulated depreciation
Properties				213
Units				53,629
Investment in Real Estate, Gross				$ 18,736,550,115
Accumulated Depreciation	(3,750,817,149)			(3,750,817,149)
Investment in Real Estate Net				14,985,732,966
Encumbrances				$ 0
Changes in accumulated depreciation
Balance, end of year	(3,750,817,149)
Encumbered Properties [Member]
Overall summary of real estate and accumulated depreciation
Properties				87
Units				22,884
Investment in Real Estate, Gross				$ 6,649,875,360
Accumulated Depreciation	(1,609,572,267)			(1,609,572,267)
Investment in Real Estate Net				5,040,303,093
Encumbrances				$ 4,119,180,825
Changes in accumulated depreciation
Balance, end of year	(1,609,572,267)
Total Consolidated Investment in Real Estate [Member]
Overall summary of real estate and accumulated depreciation
Properties				300
Units				76,513
Investment in Real Estate, Gross				$ 25,386,425,475
Accumulated Depreciation	(5,360,389,416)			(5,360,389,416)
Investment in Real Estate Net				20,026,036,059
Encumbrances				$ 4,119,180,825
Changes in accumulated depreciation
Balance, end of year	$ (5,360,389,416)

Real Estate and Accumulated D89

Real Estate and Accumulated Depreciation (Details)	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Furniture, fixtures and equipment	$ 1,346,300,000	$ 1,207,098,000
Land And Depreciable Property Net	15,800,000,000	17,000,000,000
Real Estate And Accumulated Depreciation Abstract
Accumulated Depreciation	$ (5,360,389,000)	$ (6,084,616,000)	$ (5,432,805,000)	$ (4,807,709,000)
Partially Owned Properties	302
Apartment Units	77,458
100 K 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	0
Initial Cost to Company, Land	$ 15,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,782,320
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	15,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	10,782,320
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,382,320
Accumulated Depreciation	0
Investment in Real Estate Net	26,382,320
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	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	6,750,405
Gross Amount Carried at close of period 12/31/2016, Land	103,539,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	100,833,130
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	204,372,230
Accumulated Depreciation	(41,010,422)
Investment in Real Estate Net	163,361,808
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	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	12,780,175
Gross Amount Carried at close of period 12/31/2016, Land	139,933,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	203,744,920
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	343,678,420
Accumulated Depreciation	(81,836,307)
Investment in Real Estate Net	261,842,113
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	236
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	111,872,438
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	60,750
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	111,933,188
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	111,933,188
Accumulated Depreciation	(7,014,736)
Investment in Real Estate Net	104,918,452
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	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	1,396,338
Gross Amount Carried at close of period 12/31/2016, Land	22,037,831
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,358,507
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	77,396,338
Accumulated Depreciation	(12,584,288)
Investment in Real Estate Net	64,812,050
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	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	2,910,862
Gross Amount Carried at close of period 12/31/2016, Land	32,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	95,586,090
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	127,986,090
Accumulated Depreciation	(16,638,099)
Investment in Real Estate Net	111,347,991
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	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	11,344,206
Gross Amount Carried at close of period 12/31/2016, Land	144,968,250
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	149,690,887
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	294,659,137
Accumulated Depreciation	(61,661,842)
Investment in Real Estate Net	232,997,295
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	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	101,850
Gross Amount Carried at close of period 12/31/2016, Land	18,937,702
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,860,529
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	113,798,231
Accumulated Depreciation	(12,803,962)
Investment in Real Estate Net	100,994,269
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	144
Initial Cost to Company, Land	$ 9,213,513
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	2,112,056
Gross Amount Carried at close of period 12/31/2016, Land	9,213,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	38,671,245
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	47,884,758
Accumulated Depreciation	(15,416,324)
Investment in Real Estate Net	32,468,434
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	0
Initial Cost to Company, Land	$ 10,401,958
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,932,954
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	10,401,958
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,932,954
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	15,334,912
Accumulated Depreciation	0
Investment in Real Estate Net	15,334,912
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	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	14,505,801
Gross Amount Carried at close of period 12/31/2016, Land	54,638,298
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	54,867,503
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	109,505,801
Accumulated Depreciation	(21,697,139)
Investment in Real Estate Net	87,808,662
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	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	2,999,587
Gross Amount Carried at close of period 12/31/2016, Land	31,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	112,005,321
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	143,405,321
Accumulated Depreciation	(19,795,492)
Investment in Real Estate Net	123,609,829
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	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	2,103,036
Gross Amount Carried at close of period 12/31/2016, Land	11,321,198
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,777,211
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	63,098,409
Accumulated Depreciation	(9,394,581)
Investment in Real Estate Net	53,703,828
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	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	2,390,730
Gross Amount Carried at close of period 12/31/2016, Land	21,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,115,393
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	103,015,393
Accumulated Depreciation	(13,936,506)
Investment in Real Estate Net	89,078,887
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
M St 2400 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Washington, D.C.
Real Estate And Accumulated Depreciation Units	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	4,082,076
Gross Amount Carried at close of period 12/31/2016, Land	30,006,593
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	118,095,861
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	148,102,454
Accumulated Depreciation	(45,418,266)
Investment in Real Estate Net	102,684,188
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	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	517,562
Gross Amount Carried at close of period 12/31/2016, Land	14,450,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	116,342,492
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	130,792,562
Accumulated Depreciation	(10,319,919)
Investment in Real Estate Net	120,472,643
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
340 Fremont [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units	348
Initial Cost to Company, Land	$ 42,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	244,995,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	88
Gross Amount Carried at close of period 12/31/2016, Land	42,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	244,995,534
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	286,995,534
Accumulated Depreciation	(4,611,169)
Investment in Real Estate Net	282,384,365
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
3003 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	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	4,018,369
Gross Amount Carried at close of period 12/31/2016, Land	56,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	145,209,949
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	201,509,949
Accumulated Depreciation	(27,557,126)
Investment in Real Estate Net	173,952,823
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
45 Worthington [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,058,673
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	2,058,673
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	2,058,673
Accumulated Depreciation	0
Investment in Real Estate Net	2,058,673
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
420 East 80th 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	155
Initial Cost to Company, Land	$ 39,277,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,026,984
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,252,598
Gross Amount Carried at close of period 12/31/2016, Land	39,277,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,279,582
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	66,556,582
Accumulated Depreciation	(12,559,376)
Investment in Real Estate Net	53,997,206
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	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	3,740,413
Gross Amount Carried at close of period 12/31/2016, Land	28,150,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	142,340,413
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	170,490,413
Accumulated Depreciation	(39,542,039)
Investment in Real Estate Net	130,948,374
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
455 I 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	0
Initial Cost to Company, Land	$ 12,762,857
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	45,794,997
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	12,762,857
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,794,997
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	58,557,854
Accumulated Depreciation	0
Investment in Real Estate Net	58,557,854
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	1,237,673
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	1,237,673
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	1,237,673
Accumulated Depreciation	0
Investment in Real Estate Net	1,237,673
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	0
Initial Cost to Company, Land	$ 13,131,456
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,144,682
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	13,131,456
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	11,144,682
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,276,138
Accumulated Depreciation	0
Investment in Real Estate Net	24,276,138
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
660 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	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	734,411
Gross Amount Carried at close of period 12/31/2016, Land	32,852,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,874,962
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	76,726,962
Accumulated Depreciation	(17,905,409)
Investment in Real Estate Net	58,821,553
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	Boston, MA
Real Estate And Accumulated Depreciation Units	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	2,325,428
Gross Amount Carried at close of period 12/31/2016, Land	106,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	168,637,107
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	274,737,107
Accumulated Depreciation	(29,635,573)
Investment in Real Estate Net	245,101,534
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	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	1,103,051
Gross Amount Carried at close of period 12/31/2016, Land	28,108,899
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	237,866,604
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	265,975,503
Accumulated Depreciation	(57,907,087)
Investment in Real Estate Net	208,068,416
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	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	12,799,538
Gross Amount Carried at close of period 12/31/2016, Land	22,611,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,291,709
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,903,309
Accumulated Depreciation	(39,723,414)
Investment in Real Estate Net	73,179,895
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	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	264,502
Gross Amount Carried at close of period 12/31/2016, Land	5,249,124
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,874,378
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,123,502
Accumulated Depreciation	(4,400,965)
Investment in Real Estate Net	19,722,537
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	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	5,319,200
Gross Amount Carried at close of period 12/31/2016, Land	27,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	174,311,640
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	202,211,640
Accumulated Depreciation	(28,587,488)
Investment in Real Estate Net	173,624,152
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	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	1,975,718
Gross Amount Carried at close of period 12/31/2016, Land	65,352,706
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	67,723,012
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	133,075,718
Accumulated Depreciation	(24,056,905)
Investment in Real Estate Net	109,018,813
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	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	1,965,143
Gross Amount Carried at close of period 12/31/2016, Land	7,786,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,552,468
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	41,339,268
Accumulated Depreciation	(7,400,305)
Investment in Real Estate Net	33,938,963
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	0
Initial Cost to Company, Land	$ 41,363,921
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	166,903,627
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	41,363,921
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	166,903,627
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	208,267,548
Accumulated Depreciation	0
Investment in Real Estate Net	208,267,548
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Acton Courtyard [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	71
Initial Cost to Company, Land	$ 5,550,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	15,785,509
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	199,531
Gross Amount Carried at close of period 12/31/2016, Land	5,550,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,985,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	21,535,040
Accumulated Depreciation	(6,078,896)
Investment in Real Estate Net	15,456,144
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	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	1,712,897
Gross Amount Carried at close of period 12/31/2016, Land	18,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	91,507,098
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	110,407,098
Accumulated Depreciation	(15,639,767)
Investment in Real Estate Net	94,767,331
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Altitude [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units	545
Initial Cost to Company, Land	$ 43,783,485
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	147,918,661
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	25,744
Gross Amount Carried at close of period 12/31/2016, Land	43,783,485
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	147,944,405
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	191,727,890
Accumulated Depreciation	(2,490,933)
Investment in Real Estate Net	189,236,957
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Alton, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 11,049,027
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	90,857,975
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	11,049,027
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,857,975
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	101,907,002
Accumulated Depreciation	0
Investment in Real Estate Net	101,907,002
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	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	4,162,140
Gross Amount Carried at close of period 12/31/2016, Land	9,057,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,645,782
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,703,082
Accumulated Depreciation	(13,943,284)
Investment in Real Estate Net	17,759,798
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Artech Building [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	27
Initial Cost to Company, Land	$ 1,642,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,152,518
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	329,292
Gross Amount Carried at close of period 12/31/2016, Land	1,642,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	9,481,810
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	11,123,810
Accumulated Depreciation	(3,371,389)
Investment in Real Estate Net	7,752,421
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	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	670,299
Gross Amount Carried at close of period 12/31/2016, Land	8,000,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	36,744,899
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	44,745,299
Accumulated Depreciation	(9,258,909)
Investment in Real Estate Net	35,486,390
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	261
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	2,277,634
Gross Amount Carried at close of period 12/31/2016, Land	12,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,743,901
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	76,043,901
Accumulated Depreciation	(12,191,117)
Investment in Real Estate Net	63,852,784
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	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	90,854
Gross Amount Carried at close of period 12/31/2016, Land	32,401,680
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,226,286
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	79,627,966
Accumulated Depreciation	(3,149,449)
Investment in Real Estate Net	76,478,517
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	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	1,749,322
Gross Amount Carried at close of period 12/31/2016, Land	7,995,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,754,322
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,749,322
Accumulated Depreciation	(5,134,751)
Investment in Real Estate Net	22,614,571
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Azure [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Francisco, CA
Real Estate And Accumulated Depreciation Units	273
Initial Cost to Company, Land	$ 32,855,115
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	152,254,155
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	26,494
Gross Amount Carried at close of period 12/31/2016, Land	32,855,115
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	152,280,649
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	185,135,764
Accumulated Depreciation	(7,791,579)
Investment in Real Estate Net	177,344,185
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	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	2,909,175
Gross Amount Carried at close of period 12/31/2016, Land	7,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,346,414
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,946,414
Accumulated Depreciation	(13,103,323)
Investment in Real Estate Net	24,843,091
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	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	1,000,140
Gross Amount Carried at close of period 12/31/2016, Land	114,351,405
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	166,648,735
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	281,000,140
Accumulated Depreciation	(35,148,328)
Investment in Real Estate Net	245,851,812
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	1
Initial Cost to Company, Land	$ 63,158
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	248,928
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	(5,320)
Gross Amount Carried at close of period 12/31/2016, Land	63,158
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	243,608
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	306,766
Accumulated Depreciation	0
Investment in Real Estate Net	306,766
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	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	683,777
Gross Amount Carried at close of period 12/31/2016, Land	9,098,808
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,384,969
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,483,777
Accumulated Depreciation	(6,820,566)
Investment in Real Estate Net	31,663,211
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	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	1,050,136
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	74,239,398
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	74,239,398
Accumulated Depreciation	(14,067,543)
Investment in Real Estate Net	60,171,855
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	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	3,599,062
Gross Amount Carried at close of period 12/31/2016, Land	9,991,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,846,340
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,837,840
Accumulated Depreciation	(15,933,244)
Investment in Real Estate Net	19,904,596
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Bridford Lakes Two [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Greensboro, NC
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 1,100,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	792,508
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	1,100,564
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	792,508
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	1,893,072
Accumulated Depreciation	0
Investment in Real Estate Net	1,893,072
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Brooklyner (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	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	1,827,017
Gross Amount Carried at close of period 12/31/2016, Land	40,099,922
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	223,265,648
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	263,365,570
Accumulated Depreciation	(46,337,376)
Investment in Real Estate Net	217,028,194
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	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	7,841
Gross Amount Carried at close of period 12/31/2016, Land	17,125,766
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,082,075
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,207,841
Accumulated Depreciation	(978,707)
Investment in Real Estate Net	44,229,134
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cambridge Park [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units	312
Initial Cost to Company, Land	$ 31,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	106,048,587
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,107,045
Gross Amount Carried at close of period 12/31/2016, Land	31,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	110,155,632
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	141,355,632
Accumulated Depreciation	(19,695,291)
Investment in Real Estate Net	121,660,341
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	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	7,872,672
Gross Amount Carried at close of period 12/31/2016, Land	10,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	59,240,585
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	69,240,585
Accumulated Depreciation	(28,386,923)
Investment in Real Estate Net	40,853,662
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Cascade [Domain]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 23,751,564
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	99,710,750
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	23,751,564
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	99,710,750
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	123,462,314
Accumulated Depreciation	0
Investment in Real Estate Net	123,462,314
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	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	10,056,055
Gross Amount Carried at close of period 12/31/2016, Land	9,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,136,433
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	89,836,433
Accumulated Depreciation	(33,705,547)
Investment in Real Estate Net	56,130,886
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Centre Club [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ontario, CA
Real Estate And Accumulated Depreciation Units	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	7,413,964
Gross Amount Carried at close of period 12/31/2016, Land	7,436,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,428,753
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	47,864,753
Accumulated Depreciation	(21,574,006)
Investment in Real Estate Net	26,290,747
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	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	2,266,923
Gross Amount Carried at close of period 12/31/2016, Land	5,220,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,011,566
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,231,566
Accumulated Depreciation	(8,540,355)
Investment in Real Estate Net	15,691,211
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	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	5,626,705
Gross Amount Carried at close of period 12/31/2016, Land	40,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	101,563,751
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	141,963,751
Accumulated Depreciation	(17,548,498)
Investment in Real Estate Net	124,415,253
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	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	857,946
Gross Amount Carried at close of period 12/31/2016, Land	6,863,792
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,334,154
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	44,197,946
Accumulated Depreciation	(11,712,818)
Investment in Real Estate Net	32,485,128
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	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	3,126,524
Gross Amount Carried at close of period 12/31/2016, Land	15,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,002,781
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,102,781
Accumulated Depreciation	(7,953,824)
Investment in Real Estate Net	52,148,957
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
CityView at Longwood [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units	295
Initial Cost to Company, Land	$ 14,704,898
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	79,195,102
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,574,412
Gross Amount Carried at close of period 12/31/2016, Land	14,704,898
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,769,514
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	104,474,412
Accumulated Depreciation	(25,961,856)
Investment in Real Estate Net	78,512,556
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	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	2,143,113
Gross Amount Carried at close of period 12/31/2016, Land	30,400,340
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	105,967,773
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	136,368,113
Accumulated Depreciation	(26,624,877)
Investment in Real Estate Net	109,743,236
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	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	3,832,717
Gross Amount Carried at close of period 12/31/2016, Land	6,615,467
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,662,052
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,277,519
Accumulated Depreciation	(8,171,402)
Investment in Real Estate Net	17,106,117
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	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	4,856,602
Gross Amount Carried at close of period 12/31/2016, Land	27,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	118,858,897
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	146,458,897
Accumulated Depreciation	(20,124,977)
Investment in Real Estate Net	126,333,920
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	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	1,796,515
Gross Amount Carried at close of period 12/31/2016, Land	13,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,709,628
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,209,628
Accumulated Depreciation	(5,801,661)
Investment in Real Estate Net	36,407,967
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	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	4,635,703
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	92,021,727
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,021,727
Accumulated Depreciation	(17,966,254)
Investment in Real Estate Net	74,055,473
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	192
Initial Cost to Company, Land	$ 9,606,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,193,231
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,013,129
Gross Amount Carried at close of period 12/31/2016, Land	9,606,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,206,360
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,812,960
Accumulated Depreciation	(15,771,922)
Investment in Real Estate Net	19,041,038
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	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	3,914,279
Gross Amount Carried at close of period 12/31/2016, Land	32,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	89,033,603
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	121,333,603
Accumulated Depreciation	(15,979,321)
Investment in Real Estate Net	105,354,282
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	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	3,157,515
Gross Amount Carried at close of period 12/31/2016, Land	17,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,076,490
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,276,490
Accumulated Depreciation	(9,260,208)
Investment in Real Estate Net	59,016,282
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	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	8,800,432
Gross Amount Carried at close of period 12/31/2016, Land	1,808,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,074,793
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,883,693
Accumulated Depreciation	(17,314,590)
Investment in Real Estate Net	9,569,103
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	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	1,125,457
Gross Amount Carried at close of period 12/31/2016, Land	13,092,552
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,032,905
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	58,125,457
Accumulated Depreciation	(10,423,583)
Investment in Real Estate Net	47,701,874
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Elevé [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Glendale, CA
Real Estate And Accumulated Depreciation Units	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	415,204
Gross Amount Carried at close of period 12/31/2016, Land	14,080,560
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,834,644
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	70,915,204
Accumulated Depreciation	(7,584,216)
Investment in Real Estate Net	63,330,988
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	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	22,690,975
Gross Amount Carried at close of period 12/31/2016, Land	14,855,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,257,611
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,112,611
Accumulated Depreciation	(52,167,424)
Investment in Real Estate Net	42,945,187
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Encinitas Heights (fka Encinitas) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Encinitas, CA
Real Estate And Accumulated Depreciation Units	120
Initial Cost to Company, Land	$ 12,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,207,497
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	617,199
Gross Amount Carried at close of period 12/31/2016, Land	12,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,824,696
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	41,824,696
Accumulated Depreciation	(5,889,783)
Investment in Real Estate Net	35,934,913
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	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	1,211,820
Gross Amount Carried at close of period 12/31/2016, Land	8,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,657,823
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,357,823
Accumulated Depreciation	(7,869,084)
Investment in Real Estate Net	27,488,739
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Fountains at Emerald Park (fka Emerald Park) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Dublin, CA
Real Estate And Accumulated Depreciation Units	324
Initial Cost to Company, Land	$ 25,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	83,986,217
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	927,144
Gross Amount Carried at close of period 12/31/2016, Land	25,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	84,913,361
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	110,813,361
Accumulated Depreciation	(15,751,998)
Investment in Real Estate Net	95,061,363
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	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	2,733,097
Gross Amount Carried at close of period 12/31/2016, Land	25,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,486,211
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	107,286,211
Accumulated Depreciation	(14,742,488)
Investment in Real Estate Net	92,543,723
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Gallery, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hermosa Beach, CA
Real Estate And Accumulated Depreciation Units	169
Initial Cost to Company, Land	$ 18,144,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	46,567,941
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,651,435
Gross Amount Carried at close of period 12/31/2016, Land	18,144,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,219,376
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	67,363,376
Accumulated Depreciation	(19,871,531)
Investment in Real Estate Net	47,491,845
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Garden Garage [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,917,373
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,917,373
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	4,917,373
Accumulated Depreciation	0
Investment in Real Estate Net	4,917,373
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	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	13,834,746
Gross Amount Carried at close of period 12/31/2016, Land	9,209,780
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,557,412
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,767,192
Accumulated Depreciation	(21,301,983)
Investment in Real Estate Net	27,465,209
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	164
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	4,477,710
Gross Amount Carried at close of period 12/31/2016, Land	1,722,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,949,139
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	21,671,539
Accumulated Depreciation	(12,574,169)
Investment in Real Estate Net	9,097,370
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Glen Meadow [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Franklin, MA
Real Estate And Accumulated Depreciation Units	288
Initial Cost to Company, Land	$ 2,339,331
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,133,588
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,347,422
Gross Amount Carried at close of period 12/31/2016, Land	2,339,331
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,481,010
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,820,341
Accumulated Depreciation	(12,813,162)
Investment in Real Estate Net	10,007,179
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	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	4,042,761
Gross Amount Carried at close of period 12/31/2016, Land	10,806,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,378,091
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,184,091
Accumulated Depreciation	(15,493,262)
Investment in Real Estate Net	29,690,829
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	758
Initial Cost to Company, Land	$ 59,387,158
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	20,957,019
Gross Amount Carried at close of period 12/31/2016, Land	59,387,158
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	179,786,451
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	239,173,609
Accumulated Depreciation	(73,216,856)
Investment in Real Estate Net	165,956,753
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Helios/1610 2nd Avenue [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 18,061,674
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	162,443,822
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	18,061,674
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	162,443,822
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	180,505,496
Accumulated Depreciation	0
Investment in Real Estate Net	180,505,496
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	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	1,839,852
Gross Amount Carried at close of period 12/31/2016, Land	10,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,648,187
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	44,448,187
Accumulated Depreciation	(14,133,220)
Investment in Real Estate Net	30,314,967
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	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	1,741,466
Gross Amount Carried at close of period 12/31/2016, Land	6,895,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,725,063
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,620,063
Accumulated Depreciation	(9,305,589)
Investment in Real Estate Net	18,314,474
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	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	323,337
Gross Amount Carried at close of period 12/31/2016, Land	23,299,892
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	103,023,445
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	126,323,337
Accumulated Depreciation	(13,208,612)
Investment in Real Estate Net	113,114,725
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Highlands at Cherry Hill [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cherry Hills, NJ
Real Estate And Accumulated Depreciation Units	170
Initial Cost to Company, Land	$ 6,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	21,459,108
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,219,837
Gross Amount Carried at close of period 12/31/2016, Land	6,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,678,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	29,478,945
Accumulated Depreciation	(9,622,596)
Investment in Real Estate Net	19,856,349
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	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	1,671,208
Gross Amount Carried at close of period 12/31/2016, Land	10,080,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,198,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,278,120
Accumulated Depreciation	(15,870,459)
Investment in Real Estate Net	33,407,661
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	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	623,527
Gross Amount Carried at close of period 12/31/2016, Land	9,435,760
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,187,767
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,623,527
Accumulated Depreciation	(8,254,511)
Investment in Real Estate Net	34,369,016
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	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	2,182,860
Gross Amount Carried at close of period 12/31/2016, Land	23,420,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	72,160,559
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	95,580,559
Accumulated Depreciation	(30,934,660)
Investment in Real Estate Net	64,645,899
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hudson Crossing Two [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 10,599,287
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,293,787
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	10,599,287
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	3,293,787
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	13,893,074
Accumulated Depreciation	0
Investment in Real Estate Net	13,893,074
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	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	4,844,133
Gross Amount Carried at close of period 12/31/2016, Land	5,350,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,958,207
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	51,308,207
Accumulated Depreciation	(20,241,451)
Investment in Real Estate Net	31,066,756
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Hunt Club II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Charlotte, NC
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 100,000
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 12/31/2016, Land	100,000
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	100,000
Accumulated Depreciation	0
Investment in Real Estate Net	100,000
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	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	992,859
Gross Amount Carried at close of period 12/31/2016, Land	2,732,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	14,881,141
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	17,613,941
Accumulated Depreciation	(6,865,471)
Investment in Real Estate Net	10,748,470
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Jia [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Los Angeles, CA
Real Estate And Accumulated Depreciation Units	280
Initial Cost to Company, Land	$ 14,791,831
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	76,417,368
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	160,373
Gross Amount Carried at close of period 12/31/2016, Land	14,791,831
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	76,577,741
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	91,369,572
Accumulated Depreciation	(11,450,392)
Investment in Real Estate Net	79,919,180
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	206
Initial Cost to Company, Land	$ 11,726,305
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	55,592,607
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,285
Gross Amount Carried at close of period 12/31/2016, Land	11,726,305
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,602,892
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	67,329,197
Accumulated Depreciation	(2,870,469)
Investment in Real Estate Net	64,458,728
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Kelvin, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units	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	140,201
Gross Amount Carried at close of period 12/31/2016, Land	15,521,552
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,993,649
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	80,515,201
Accumulated Depreciation	(5,226,037)
Investment in Real Estate Net	75,289,164
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Kendall Square II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Cambridge, MA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,361,587
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	2,361,587
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	2,361,587
Accumulated Depreciation	0
Investment in Real Estate Net	2,361,587
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	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	8,727,114
Gross Amount Carried at close of period 12/31/2016, Land	27,246,045
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,468,164
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,714,209
Accumulated Depreciation	(27,123,316)
Investment in Real Estate Net	46,590,893
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	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	12,900,751
Gross Amount Carried at close of period 12/31/2016, Land	5,928,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	46,496,013
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,424,413
Accumulated Depreciation	(32,166,271)
Investment in Real Estate Net	20,258,142
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	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	927,140
Gross Amount Carried at close of period 12/31/2016, Land	5,805,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,632,140
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,437,140
Accumulated Depreciation	(7,515,112)
Investment in Real Estate Net	24,922,028
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Loft 590 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units	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	593,626
Gross Amount Carried at close of period 12/31/2016, Land	20,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	68,502,649
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,602,649
Accumulated Depreciation	(11,467,543)
Investment in Real Estate Net	77,135,106
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	186
Initial Cost to Company, Land	$ 23,300,000
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	4,430,000
Gross Amount Carried at close of period 12/31/2016, Land	23,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	82,875,657
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	106,175,657
Accumulated Depreciation	(14,293,167)
Investment in Real Estate Net	91,882,490
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	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	1,952,072
Gross Amount Carried at close of period 12/31/2016, Land	73,170,045
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,914,582
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	129,084,627
Accumulated Depreciation	(20,862,433)
Investment in Real Estate Net	108,222,194
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	710
Initial Cost to Company, Land	$ 47,096,917
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	150,143,916
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	77,175,848
Gross Amount Carried at close of period 12/31/2016, Land	47,096,917
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	227,319,764
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	274,416,681
Accumulated Depreciation	(140,185,560)
Investment in Real Estate Net	134,231,121
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	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	726,983
Gross Amount Carried at close of period 12/31/2016, Land	22,346,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	62,228,141
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	84,574,654
Accumulated Depreciation	(11,547,865)
Investment in Real Estate Net	73,026,789
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	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	5,590,178
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	174,432,620
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	174,432,620
Accumulated Depreciation	(34,075,934)
Investment in Real Estate Net	140,356,686
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	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	4,874,252
Gross Amount Carried at close of period 12/31/2016, Land	60,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,185,734
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	155,085,734
Accumulated Depreciation	(17,348,528)
Investment in Real Estate Net	137,737,206
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	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	419,390
Gross Amount Carried at close of period 12/31/2016, Land	8,125,216
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,798,174
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,923,390
Accumulated Depreciation	(5,879,972)
Investment in Real Estate Net	30,043,418
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	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,539
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	11,539
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	11,539
Accumulated Depreciation	0
Investment in Real Estate Net	11,539
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	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	1,742,611
Gross Amount Carried at close of period 12/31/2016, Land	8,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	54,272,057
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	62,772,057
Accumulated Depreciation	(20,324,720)
Investment in Real Estate Net	42,447,337
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	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	5,632,060
Gross Amount Carried at close of period 12/31/2016, Land	75,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	108,337,461
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	184,137,461
Accumulated Depreciation	(21,534,636)
Investment in Real Estate Net	162,602,825
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	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	3,216,250
Gross Amount Carried at close of period 12/31/2016, Land	9,360,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,994,803
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,354,803
Accumulated Depreciation	(13,232,302)
Investment in Real Estate Net	20,122,501
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	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	12,538,178
Gross Amount Carried at close of period 12/31/2016, Land	38,607,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	90,010,395
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	128,617,395
Accumulated Depreciation	(29,143,721)
Investment in Real Estate Net	99,473,674
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Northridge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pleasant Hill, CA
Real Estate And Accumulated Depreciation Units	221
Initial Cost to Company, Land	$ 5,524,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,691,705
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,511,874
Gross Amount Carried at close of period 12/31/2016, Land	5,524,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,203,579
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,727,579
Accumulated Depreciation	(17,391,149)
Investment in Real Estate Net	13,336,430
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	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	9,746,651
Gross Amount Carried at close of period 12/31/2016, Land	3,390,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,263,925
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,654,625
Accumulated Depreciation	(28,656,591)
Investment in Real Estate Net	14,998,034
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	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	1,529,010
Gross Amount Carried at close of period 12/31/2016, Land	22,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	30,201,989
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,401,989
Accumulated Depreciation	(5,884,677)
Investment in Real Estate Net	46,517,312
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	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	2,425,184
Gross Amount Carried at close of period 12/31/2016, Land	15,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,899,520
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,299,520
Accumulated Depreciation	(6,786,525)
Investment in Real Estate Net	46,512,995
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
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	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	2,437,138
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	123,232,497
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	123,232,497
Accumulated Depreciation	(24,113,286)
Investment in Real Estate Net	99,119,211
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	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	5,042,217
Gross Amount Carried at close of period 12/31/2016, Land	23,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	66,062,655
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	89,462,655
Accumulated Depreciation	(31,804,000)
Investment in Real Estate Net	57,658,655
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	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	3,961,557
Gross Amount Carried at close of period 12/31/2016, Land	5,111,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,871,995
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	20,983,195
Accumulated Depreciation	(9,843,174)
Investment in Real Estate Net	11,140,021
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	301
Initial Cost to Company, Land	$ 16,807,519
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,703,105
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,853
Gross Amount Carried at close of period 12/31/2016, Land	16,807,519
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,707,958
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	80,515,477
Accumulated Depreciation	(3,220,384)
Investment in Real Estate Net	77,295,093
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	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	615,810
Gross Amount Carried at close of period 12/31/2016, Land	7,740,467
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,761,991
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,502,458
Accumulated Depreciation	(3,368,591)
Investment in Real Estate Net	49,133,867
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	241
Initial Cost to Company, Land	$ 30,224,393
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	132,422,943
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	30,224,393
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	132,422,943
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	162,647,336
Accumulated Depreciation	0
Investment in Real Estate Net	162,647,336
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	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	1,114,418
Gross Amount Carried at close of period 12/31/2016, Land	32,250,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	111,864,418
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	144,114,418
Accumulated Depreciation	(18,609,682)
Investment in Real Estate Net	125,504,736
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	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	25,690
Gross Amount Carried at close of period 12/31/2016, Land	5,911,041
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,980,649
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,891,690
Accumulated Depreciation	(1,315,590)
Investment in Real Estate Net	24,576,100
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	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	5,639,147
Gross Amount Carried at close of period 12/31/2016, Land	40,504,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	23,664,826
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	64,168,826
Accumulated Depreciation	(11,317,834)
Investment in Real Estate Net	52,850,992
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	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	6,917,858
Gross Amount Carried at close of period 12/31/2016, Land	37,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	16,773,455
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	54,373,455
Accumulated Depreciation	(9,519,277)
Investment in Real Estate Net	44,854,178
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	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	8,635,413
Gross Amount Carried at close of period 12/31/2016, Land	52,654,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,681,164
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	84,335,164
Accumulated Depreciation	(15,575,683)
Investment in Real Estate Net	68,759,481
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	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	8,841,139
Gross Amount Carried at close of period 12/31/2016, Land	102,163,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	117,830,541
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	219,993,541
Accumulated Depreciation	(44,109,145)
Investment in Real Estate Net	175,884,396
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	173
Initial Cost to Company, Land	$ 16,667,059
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,690,072
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	48,612
Gross Amount Carried at close of period 12/31/2016, Land	16,667,059
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	67,738,684
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	84,405,743
Accumulated Depreciation	(4,037,098)
Investment in Real Estate Net	80,368,645
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Park at Pentagon Row (fka Pentagon City) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units	298
Initial Cost to Company, Land	$ 28,300,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	78,838,184
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,353,525
Gross Amount Carried at close of period 12/31/2016, Land	28,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,191,709
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	108,491,709
Accumulated Depreciation	(14,341,704)
Investment in Real Estate Net	94,150,005
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	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	1,138,671
Gross Amount Carried at close of period 12/31/2016, Land	13,700,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,226,190
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	73,926,190
Accumulated Depreciation	(10,132,810)
Investment in Real Estate Net	63,793,380
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Park Hacienda (fka Hacienda) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pleasanton, CA
Real Estate And Accumulated Depreciation Units	540
Initial Cost to Company, Land	$ 43,200,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	128,753,359
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,303,861
Gross Amount Carried at close of period 12/31/2016, Land	43,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	130,057,220
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,257,220
Accumulated Depreciation	(24,868,371)
Investment in Real Estate Net	148,388,849
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	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	9,833,303
Gross Amount Carried at close of period 12/31/2016, Land	3,033,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,135,686
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	40,169,186
Accumulated Depreciation	(26,282,067)
Investment in Real Estate Net	13,887,119
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	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	4,057,554
Gross Amount Carried at close of period 12/31/2016, Land	6,246,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,885,007
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,131,707
Accumulated Depreciation	(11,039,298)
Investment in Real Estate Net	11,092,409
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Pearl, The [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	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	86,236
Gross Amount Carried at close of period 12/31/2016, Land	6,972,585
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,613,651
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,586,236
Accumulated Depreciation	(1,802,018)
Investment in Real Estate Net	31,784,218
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	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	4,353,371
Gross Amount Carried at close of period 12/31/2016, Land	18,094,052
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,259,319
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	104,353,371
Accumulated Depreciation	(23,034,817)
Investment in Real Estate Net	81,318,554
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Playa Pacifica [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Hermosa Beach, CA
Real Estate And Accumulated Depreciation Units	285
Initial Cost to Company, Land	$ 35,100,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,473,822
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	21,252,912
Gross Amount Carried at close of period 12/31/2016, Land	35,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	54,726,734
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	89,826,734
Accumulated Depreciation	(22,557,639)
Investment in Real Estate Net	67,269,095
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	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	3,619,935
Gross Amount Carried at close of period 12/31/2016, Land	3,572,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,280,929
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	21,853,329
Accumulated Depreciation	(12,064,192)
Investment in Real Estate Net	9,789,137
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	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	4,531,435
Gross Amount Carried at close of period 12/31/2016, Land	8,640,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,018,561
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,658,561
Accumulated Depreciation	(14,294,138)
Investment in Real Estate Net	20,364,423
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	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	20,261,246
Gross Amount Carried at close of period 12/31/2016, Land	22,487,006
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	117,104,159
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	139,591,165
Accumulated Depreciation	(75,662,868)
Investment in Real Estate Net	63,928,297
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	453
Initial Cost to Company, Land	$ 40,830,011
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	178,838,375
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,685
Gross Amount Carried at close of period 12/31/2016, Land	40,830,011
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	178,841,060
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	219,671,071
Accumulated Depreciation	(4,297,727)
Investment in Real Estate Net	215,373,344
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	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	2,474,023
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	70,451,336
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	70,451,336
Accumulated Depreciation	(12,649,164)
Investment in Real Estate Net	57,802,172
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	256
Initial Cost to Company, Land	$ 32,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	64,436,539
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,366,624
Gross Amount Carried at close of period 12/31/2016, Land	32,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	65,803,163
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	97,803,163
Accumulated Depreciation	(25,533,405)
Investment in Real Estate Net	72,269,758
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	269
Initial Cost to Company, Land	$ 76,292,169
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	171,532,416
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	40,159
Gross Amount Carried at close of period 12/31/2016, Land	76,292,169
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	171,572,575
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	247,864,744
Accumulated Depreciation	(12,053,844)
Investment in Real Estate Net	235,810,900
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	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	6,603,855
Gross Amount Carried at close of period 12/31/2016, Land	28,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	76,399,770
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	104,599,770
Accumulated Depreciation	(35,742,052)
Investment in Real Estate Net	68,857,718
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	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	1,276,264
Gross Amount Carried at close of period 12/31/2016, Land	26,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,687,426
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,587,426
Accumulated Depreciation	(15,916,309)
Investment in Real Estate Net	96,671,117
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	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	1,069,525
Gross Amount Carried at close of period 12/31/2016, Land	15,546,376
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	66,389,535
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	81,935,911
Accumulated Depreciation	(13,743,779)
Investment in Real Estate Net	68,192,132
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	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	828,734
Gross Amount Carried at close of period 12/31/2016, Land	10,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,317,479
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	44,617,479
Accumulated Depreciation	(6,900,171)
Investment in Real Estate Net	37,717,308
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	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	5,843,205
Gross Amount Carried at close of period 12/31/2016, Land	1,857,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,556,459
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,413,859
Accumulated Depreciation	(16,685,572)
Investment in Real Estate Net	7,728,287
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Renaissance Villas [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	34
Initial Cost to Company, Land	$ 2,458,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,542,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	157,541
Gross Amount Carried at close of period 12/31/2016, Land	2,458,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,699,541
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	7,157,541
Accumulated Depreciation	(1,716,722)
Investment in Real Estate Net	5,440,819
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	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	3,985,141
Gross Amount Carried at close of period 12/31/2016, Land	27,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,014,746
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	64,014,746
Accumulated Depreciation	(7,098,473)
Investment in Real Estate Net	56,916,273
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	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	10,012,055
Gross Amount Carried at close of period 12/31/2016, Land	11,918,917
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	78,874,696
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	90,793,613
Accumulated Depreciation	(34,843,070)
Investment in Real Estate Net	55,950,543
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	584
Initial Cost to Company, Land	$ 16,769,205
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	77,511,523
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,904,720
Gross Amount Carried at close of period 12/31/2016, Land	16,769,205
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	80,416,243
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	97,185,448
Accumulated Depreciation	(27,282,993)
Investment in Real Estate Net	69,902,455
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Residences at Westgate I (fka Westage II) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pasadena, CA
Real Estate And Accumulated Depreciation Units	252
Initial Cost to Company, Land	$ 17,859,785
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	108,596,287
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	152,142
Gross Amount Carried at close of period 12/31/2016, Land	17,859,785
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	108,748,429
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	126,608,214
Accumulated Depreciation	(11,706,631)
Investment in Real Estate Net	114,901,583
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Residences at Westgate II (fka Westgage III) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pasadena, CA
Real Estate And Accumulated Depreciation Units	88
Initial Cost to Company, Land	$ 12,118,248
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	40,458,283
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	28,122
Gross Amount Carried at close of period 12/31/2016, Land	12,118,248
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,486,405
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,604,653
Accumulated Depreciation	(2,670,021)
Investment in Real Estate Net	49,934,632
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rianna I [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	78
Initial Cost to Company, Land	$ 2,268,160
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,864,482
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	570,971
Gross Amount Carried at close of period 12/31/2016, Land	2,268,160
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,435,453
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	17,703,613
Accumulated Depreciation	(4,912,805)
Investment in Real Estate Net	12,790,808
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	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	5,443,381
Gross Amount Carried at close of period 12/31/2016, Land	11,809,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	39,447,429
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	51,256,929
Accumulated Depreciation	(23,108,949)
Investment in Real Estate Net	28,147,980
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	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	1,530,506
Gross Amount Carried at close of period 12/31/2016, Land	34,963,355
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	86,118,164
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	121,081,519
Accumulated Depreciation	(16,714,984)
Investment in Real Estate Net	104,366,535
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	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	1,833,334
Gross Amount Carried at close of period 12/31/2016, Land	17,136,645
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,369,865
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,506,510
Accumulated Depreciation	(7,532,830)
Investment in Real Estate Net	51,973,680
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	319
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	1,100,173
Gross Amount Carried at close of period 12/31/2016, Land	14,355,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,994,222
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	96,349,222
Accumulated Depreciation	(18,616,561)
Investment in Real Estate Net	77,732,661
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Rolling Green (Milford) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Milford, MA
Real Estate And Accumulated Depreciation Units	304
Initial Cost to Company, Land	$ 2,012,350
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,452,150
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,325,804
Gross Amount Carried at close of period 12/31/2016, Land	2,012,350
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,777,954
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,790,304
Accumulated Depreciation	(12,541,523)
Investment in Real Estate Net	10,248,781
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	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	873,630
Gross Amount Carried at close of period 12/31/2016, Land	4,922,840
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,075,790
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,998,630
Accumulated Depreciation	(7,963,684)
Investment in Real Estate Net	28,034,946
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	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	703,088
Gross Amount Carried at close of period 12/31/2016, Land	14,641,990
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	43,561,098
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	58,203,088
Accumulated Depreciation	(11,836,842)
Investment in Real Estate Net	46,366,246
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	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	3,798,267
Gross Amount Carried at close of period 12/31/2016, Land	663,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	9,773,070
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	10,436,870
Accumulated Depreciation	(7,029,871)
Investment in Real Estate Net	3,406,999
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	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	14,316,432
Gross Amount Carried at close of period 12/31/2016, Land	3,342,381
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,653,764
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,996,145
Accumulated Depreciation	(33,910,069)
Investment in Real Estate Net	15,086,076
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	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	3,079,215
Gross Amount Carried at close of period 12/31/2016, Land	10,560,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,653,672
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,213,672
Accumulated Depreciation	(16,045,953)
Investment in Real Estate Net	23,167,719
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	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	4,194,009
Gross Amount Carried at close of period 12/31/2016, Land	1,781,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,925,925
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,707,525
Accumulated Depreciation	(12,497,731)
Investment in Real Estate Net	10,209,794
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skyline Terrace [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Burlingame, CA
Real Estate And Accumulated Depreciation Units	138
Initial Cost to Company, Land	$ 16,836,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,414,000
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,638,329
Gross Amount Carried at close of period 12/31/2016, Land	16,836,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,052,329
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,888,329
Accumulated Depreciation	(11,663,739)
Investment in Real Estate Net	45,224,590
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Skyline Towers [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Falls Church, VA
Real Estate And Accumulated Depreciation Units	939
Initial Cost to Company, Land	$ 78,278,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	91,485,591
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	39,225,721
Gross Amount Carried at close of period 12/31/2016, Land	78,278,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	130,711,312
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	208,989,512
Accumulated Depreciation	(66,807,948)
Investment in Real Estate Net	142,181,564
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	0
Initial Cost to Company, Land	$ 29,406,606
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,589,891
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	29,406,606
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	3,589,891
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,996,497
Accumulated Depreciation	0
Investment in Real Estate Net	32,996,497
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	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	4,962,421
Gross Amount Carried at close of period 12/31/2016, Land	7,503,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,010,928
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,514,328
Accumulated Depreciation	(17,403,278)
Investment in Real Estate Net	19,111,050
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	360
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	2,331,779
Gross Amount Carried at close of period 12/31/2016, Land	68,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,808,640
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	150,708,640
Accumulated Depreciation	(15,596,819)
Investment in Real Estate Net	135,111,821
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	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	3,202,676
Gross Amount Carried at close of period 12/31/2016, Land	6,936,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,526,745
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,463,345
Accumulated Depreciation	(11,356,629)
Investment in Real Estate Net	13,106,716
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Springbrook Estates [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Riverside, CA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 18,200,000
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 12/31/2016, Land	18,200,000
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	18,200,000
Accumulated Depreciation	0
Investment in Real Estate Net	18,200,000
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Summerset Village II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chatsworth, CA
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 260,646
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 12/31/2016, Land	260,646
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	260,646
Accumulated Depreciation	0
Investment in Real Estate Net	260,646
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Summit at Sausalito (fka Sausalito) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Sausalito, CA
Real Estate And Accumulated Depreciation Units	198
Initial Cost to Company, Land	$ 26,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	28,435,024
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,586,242
Gross Amount Carried at close of period 12/31/2016, Land	26,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,021,266
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	58,021,266
Accumulated Depreciation	(7,628,434)
Investment in Real Estate Net	50,392,832
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	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	165,340
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	59,047,213
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	59,047,213
Accumulated Depreciation	(10,287,817)
Investment in Real Estate Net	48,759,396
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	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	982,446
Gross Amount Carried at close of period 12/31/2016, Land	14,087,610
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,296,597
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,384,207
Accumulated Depreciation	(5,171,269)
Investment in Real Estate Net	26,212,938
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	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	5,396,605
Gross Amount Carried at close of period 12/31/2016, Land	26,767,171
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	224,219,333
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	250,986,504
Accumulated Depreciation	(62,174,271)
Investment in Real Estate Net	188,812,233
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	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	703,110
Gross Amount Carried at close of period 12/31/2016, Land	7,030,766
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,708,872
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,739,638
Accumulated Depreciation	(4,264,421)
Investment in Real Estate Net	32,475,217
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Town Center South Commercial [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	St. Charles, MD
Real Estate And Accumulated Depreciation Units	0
Initial Cost to Company, Land	$ 1,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	9,394
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	1,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	9,394
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	1,509,394
Accumulated Depreciation	0
Investment in Real Estate Net	1,509,394
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Town Square at Mark Center II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units	272
Initial Cost to Company, Land	$ 15,568,464
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	55,029,607
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,117,754
Gross Amount Carried at close of period 12/31/2016, Land	15,568,464
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,147,361
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	72,715,825
Accumulated Depreciation	(17,050,654)
Investment in Real Estate Net	55,665,171
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	287
Initial Cost to Company, Land	$ 12,542,418
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	75,766,505
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	283,439
Gross Amount Carried at close of period 12/31/2016, Land	12,542,418
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	76,049,944
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,592,362
Accumulated Depreciation	(10,215,162)
Investment in Real Estate Net	78,377,200
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	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	724,720
Gross Amount Carried at close of period 12/31/2016, Land	8,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,913,008
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,713,008
Accumulated Depreciation	(10,116,792)
Investment in Real Estate Net	21,596,216
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Vantage Pointe [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units	679
Initial Cost to Company, Land	$ 9,403,960
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	190,596,040
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	8,156,057
Gross Amount Carried at close of period 12/31/2016, Land	9,403,960
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	198,752,097
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	208,156,057
Accumulated Depreciation	(52,465,809)
Investment in Real Estate Net	155,690,248
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	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	750,251
Gross Amount Carried at close of period 12/31/2016, Land	15,322,724
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	76,926,845
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,249,569
Accumulated Depreciation	(14,412,958)
Investment in Real Estate Net	77,836,611
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	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	4,206,652
Gross Amount Carried at close of period 12/31/2016, Land	5,190,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	13,885,761
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	19,076,461
Accumulated Depreciation	(9,342,080)
Investment in Real Estate Net	9,734,381
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	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	1,921,459
Gross Amount Carried at close of period 12/31/2016, Land	18,539,817
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	132,328,824
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	150,868,641
Accumulated Depreciation	(34,495,297)
Investment in Real Estate Net	116,373,344
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	272
Initial Cost to Company, Land	$ 1,665,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,985,678
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	9,397,116
Gross Amount Carried at close of period 12/31/2016, Land	1,665,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	24,382,794
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	26,047,894
Accumulated Depreciation	(18,569,428)
Investment in Real Estate Net	7,478,466
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	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	814,553
Gross Amount Carried at close of period 12/31/2016, Land	15,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	41,673,949
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,773,949
Accumulated Depreciation	(7,931,652)
Investment in Real Estate Net	48,842,297
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	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	2,598,732
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	88,538,735
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,538,735
Accumulated Depreciation	(15,463,270)
Investment in Real Estate Net	73,075,465
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	554
Initial Cost to Company, Land	$ 27,709,329
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	175,174,600
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	15,853
Gross Amount Carried at close of period 12/31/2016, Land	27,709,329
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	175,190,453
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	202,899,782
Accumulated Depreciation	(5,630,074)
Investment in Real Estate Net	197,269,708
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	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	16,333,057
Gross Amount Carried at close of period 12/31/2016, Land	4,525,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	57,069,350
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	61,595,150
Accumulated Depreciation	(43,829,076)
Investment in Real Estate Net	17,766,074
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Vista on Courthouse [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units	220
Initial Cost to Company, Land	$ 15,550,260
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	69,449,740
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,412,841
Gross Amount Carried at close of period 12/31/2016, Land	15,550,260
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	70,862,581
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	86,412,841
Accumulated Depreciation	(21,083,205)
Investment in Real Estate Net	65,329,636
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	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	4,033,426
Gross Amount Carried at close of period 12/31/2016, Land	12,448,888
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,077,874
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	68,526,762
Accumulated Depreciation	(15,551,486)
Investment in Real Estate Net	52,975,276
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	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	6,380,938
Gross Amount Carried at close of period 12/31/2016, Land	34,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	114,866,797
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	149,266,797
Accumulated Depreciation	(20,648,479)
Investment in Real Estate Net	128,618,318
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	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	1,145,350
Gross Amount Carried at close of period 12/31/2016, Land	16,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,219,406
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,019,406
Accumulated Depreciation	(6,303,140)
Investment in Real Estate Net	45,716,266
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	207
Initial Cost to Company, Land	$ 84,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	67,055,502
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,128,963
Gross Amount Carried at close of period 12/31/2016, Land	84,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	71,184,465
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	155,984,465
Accumulated Depreciation	(15,247,357)
Investment in Real Estate Net	140,737,108
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	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	2,430,837
Gross Amount Carried at close of period 12/31/2016, Land	469,546
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	165,553,859
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	166,023,405
Accumulated Depreciation	(50,041,771)
Investment in Real Estate Net	115,981,634
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	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	467,221
Gross Amount Carried at close of period 12/31/2016, Land	10,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,602,428
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,202,428
Accumulated Depreciation	(8,102,186)
Investment in Real Estate Net	47,100,242
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	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	2,222,721
Gross Amount Carried at close of period 12/31/2016, Land	64,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,365,980
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	128,265,980
Accumulated Depreciation	(12,146,404)
Investment in Real Estate Net	116,119,576
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	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	2,395,974
Gross Amount Carried at close of period 12/31/2016, Land	34,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	59,358,604
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	93,558,604
Accumulated Depreciation	(10,435,607)
Investment in Real Estate Net	83,122,997
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	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	839,038
Gross Amount Carried at close of period 12/31/2016, Land	3,060,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	6,377,909
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	9,437,909
Accumulated Depreciation	(3,354,957)
Investment in Real Estate Net	6,082,952
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	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	547,484
Gross Amount Carried at close of period 12/31/2016, Land	1,530,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	3,571,007
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	5,101,007
Accumulated Depreciation	(1,914,301)
Investment in Real Estate Net	3,186,706
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	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	589,475
Gross Amount Carried at close of period 12/31/2016, Land	1,785,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	3,822,729
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	5,607,729
Accumulated Depreciation	(2,090,807)
Investment in Real Estate Net	3,516,922
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	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	542,370
Gross Amount Carried at close of period 12/31/2016, Land	1,955,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,083,805
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	6,038,805
Accumulated Depreciation	(2,154,240)
Investment in Real Estate Net	3,884,565
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	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	838,212
Gross Amount Carried at close of period 12/31/2016, Land	3,060,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	6,377,602
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	9,437,602
Accumulated Depreciation	(3,356,464)
Investment in Real Estate Net	6,081,138
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	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	2,301,916
Gross Amount Carried at close of period 12/31/2016, Land	9,605,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,285,301
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,890,301
Accumulated Depreciation	(11,417,791)
Investment in Real Estate Net	20,472,510
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	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	9,609,243
Gross Amount Carried at close of period 12/31/2016, Land	2,662,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,594,740
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,257,640
Accumulated Depreciation	(24,492,262)
Investment in Real Estate Net	11,765,378
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Wood Creek I [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pleasant Hill, CA
Real Estate And Accumulated Depreciation Units	256
Initial Cost to Company, Land	$ 9,729,900
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,009,768
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,948,103
Gross Amount Carried at close of period 12/31/2016, Land	9,729,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,957,871
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,687,771
Accumulated Depreciation	(20,466,696)
Investment in Real Estate Net	19,221,075
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	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	110,281,527
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	110,281,527
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	110,281,527
Accumulated Depreciation	(86,786,203)
Investment in Real Estate Net	23,495,324
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	0
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,724
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	0
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,724
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,724
Accumulated Depreciation	0
Investment in Real Estate Net	25,724
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Other
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	N/A
Real Estate And Accumulated Depreciation Units	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	51,888
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	51,888
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	51,888
Accumulated Depreciation	(3,279)
Investment in Real Estate Net	48,609
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Investment in Real Estate - Wholly Owned Unencumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units	52,102
Initial Cost to Company, Land	$ 4,477,036,244
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,029,648,911
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	941,634,623
Gross Amount Carried at close of period 12/31/2016, Land	4,477,036,244
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	13,971,283,534
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	18,448,319,778
Accumulated Depreciation	(3,651,990,171)
Investment in Real Estate Net	14,796,329,607
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
101 West End [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units	506
Initial Cost to Company, Land	$ 190,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	131,374,708
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,789,525
Gross Amount Carried at close of period 12/31/2016, Land	190,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	135,164,233
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	325,764,233
Accumulated Depreciation	(29,116,644)
Investment in Real Estate Net	296,647,589
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 105,541,770
Joyce On Pentagon Row 1401 [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units	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	4,067,409
Gross Amount Carried at close of period 12/31/2016, Land	9,780,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	93,735,574
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	103,515,574
Accumulated Depreciation	(28,321,732)
Investment in Real Estate Net	75,193,842
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 57,324,952
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	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	2,836,196
Gross Amount Carried at close of period 12/31/2016, Land	13,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	78,107,375
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	91,107,375
Accumulated Depreciation	(13,691,308)
Investment in Real Estate Net	$ 77,416,067
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
300 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	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	2,284,116
Gross Amount Carried at close of period 12/31/2016, Land	48,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	98,458,755
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	147,358,755
Accumulated Depreciation	(18,157,350)
Investment in Real Estate Net	129,201,405
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 59,763,098
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	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	2,200,064
Gross Amount Carried at close of period 12/31/2016, Land	79,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,322,688
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	160,722,688
Accumulated Depreciation	(16,079,870)
Investment in Real Estate Net	$ 144,642,818
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
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	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	2,855,350
Gross Amount Carried at close of period 12/31/2016, Land	12,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,250,122
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,850,122
Accumulated Depreciation	(6,449,425)
Investment in Real Estate Net	$ 43,400,697
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
4701 Willard Ave [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chevy Chase, MD
Real Estate And Accumulated Depreciation Units	517
Initial Cost to Company, Land	$ 76,921,130
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	153,947,682
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	29,256,068
Gross Amount Carried at close of period 12/31/2016, Land	76,921,130
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	183,203,750
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	260,124,880
Accumulated Depreciation	(41,887,641)
Investment in Real Estate Net	218,237,239
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 92,377,799
55 West Fifth I & II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Mateo, CA
Real Estate And Accumulated Depreciation Units	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	11,437,590
Gross Amount Carried at close of period 12/31/2016, Land	21,041,710
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	83,368,913
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	104,410,623
Accumulated Depreciation	(17,523,868)
Investment in Real Estate Net	86,886,755
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 27,229,091
800 Sixth Ave (fka Chelsea) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	New York, NY
Real Estate And Accumulated Depreciation Units	266
Initial Cost to Company, Land	$ 59,900,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	155,861,605
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,300,274
Gross Amount Carried at close of period 12/31/2016, Land	59,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	157,161,879
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	217,061,879
Accumulated Depreciation	(27,296,410)
Investment in Real Estate Net	189,765,469
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 76,708,911
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	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	6,246,692
Gross Amount Carried at close of period 12/31/2016, Land	3,252,993
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,992,287
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,245,280
Accumulated Depreciation	(16,141,485)
Investment in Real Estate Net	15,103,795
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 1,007,468
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	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	8,049,828
Gross Amount Carried at close of period 12/31/2016, Land	25,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,643,022
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,643,022
Accumulated Depreciation	(16,858,183)
Investment in Real Estate Net	39,784,839
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 19,946,425
Acappella [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pasadena, CA
Real Estate And Accumulated Depreciation Units	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	1,816,839
Gross Amount Carried at close of period 12/31/2016, Land	5,839,548
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,177,291
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	37,016,839
Accumulated Depreciation	(8,938,860)
Investment in Real Estate Net	28,077,979
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 19,213,624
Alborada [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fremont, CA
Real Estate And Accumulated Depreciation Units	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	7,336,822
Gross Amount Carried at close of period 12/31/2016, Land	24,310,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	66,550,951
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	90,860,951
Accumulated Depreciation	(36,408,710)
Investment in Real Estate Net	$ 54,452,241
Real Estate And Accumulated Depreciation, Encumbrances Reference	(I)
Alcyone [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	161
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	560,007
Gross Amount Carried at close of period 12/31/2016, Land	11,379,497
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,920,510
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	61,300,007
Accumulated Depreciation	(5,595,873)
Investment in Real Estate Net	55,704,134
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,675,325
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	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	1,319,564
Gross Amount Carried at close of period 12/31/2016, Land	26,650,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	64,169,564
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	90,819,564
Accumulated Depreciation	(18,676,294)
Investment in Real Estate Net	$ 72,143,270
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	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	1,314,168
Gross Amount Carried at close of period 12/31/2016, Land	7,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,851,527
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	28,851,527
Accumulated Depreciation	(10,748,443)
Investment in Real Estate Net	18,103,084
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 22,749,081
Avanti [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Anaheim, CA
Real Estate And Accumulated Depreciation Units	162
Initial Cost to Company, Land	$ 12,960,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	18,497,682
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,706,778
Gross Amount Carried at close of period 12/31/2016, Land	12,960,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,204,460
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,164,460
Accumulated Depreciation	(8,619,700)
Investment in Real Estate Net	25,544,760
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 25,005,850
Avenir [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Boston, MA
Real Estate And Accumulated Depreciation Units	241
Initial Cost to Company, Land	$ 0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	114,321,618
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,416,319
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	115,737,937
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	115,737,937
Accumulated Depreciation	(20,055,604)
Investment in Real Estate Net	95,682,333
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 90,544,765
Bella Vista Apartments at Boca Del Mar [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Woodland Hills, CA
Real Estate And Accumulated Depreciation Units	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	4,165,480
Gross Amount Carried at close of period 12/31/2016, Land	31,682,754
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	125,261,266
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	156,944,020
Accumulated Depreciation	(49,400,072)
Investment in Real Estate Net	107,543,948
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 57,848,455
Berkeleyan [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	56
Initial Cost to Company, Land	$ 4,377,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,022,110
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	360,831
Gross Amount Carried at close of period 12/31/2016, Land	4,377,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	16,382,941
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	20,759,941
Accumulated Depreciation	(6,147,451)
Investment in Real Estate Net	14,612,490
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 8,188,077
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	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	1,869,918
Gross Amount Carried at close of period 12/31/2016, Land	12,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,397,297
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	57,997,297
Accumulated Depreciation	(8,314,350)
Investment in Real Estate Net	$ 49,682,947
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
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	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	11,662,759
Gross Amount Carried at close of period 12/31/2016, Land	2,288,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,259,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,547,340
Accumulated Depreciation	(25,490,481)
Investment in Real Estate Net	$ 9,056,859
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	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	2,167,212
Gross Amount Carried at close of period 12/31/2016, Land	3,397,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	11,456,286
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	14,853,386
Accumulated Depreciation	(7,244,601)
Investment in Real Estate Net	7,608,785
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 9,205,288
Citrus Suites [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Monica, CA
Real Estate And Accumulated Depreciation Units	70
Initial Cost to Company, Land	$ 9,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,950,326
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,623,844
Gross Amount Carried at close of period 12/31/2016, Land	9,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,574,170
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,574,170
Accumulated Depreciation	(3,264,484)
Investment in Real Estate Net	$ 24,309,686
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
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	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	3,359,210
Gross Amount Carried at close of period 12/31/2016, Land	18,300,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	69,751,624
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	88,051,624
Accumulated Depreciation	(12,463,465)
Investment in Real Estate Net	$ 75,588,159
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
Columbia Crossing [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Arlington, VA
Real Estate And Accumulated Depreciation Units	247
Initial Cost to Company, Land	$ 23,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	53,045,073
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,467,048
Gross Amount Carried at close of period 12/31/2016, Land	23,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,512,121
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	79,012,121
Accumulated Depreciation	(10,603,755)
Investment in Real Estate Net	$ 68,408,366
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
Deerwood (SD) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units	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	14,552,126
Gross Amount Carried at close of period 12/31/2016, Land	2,082,095
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	33,291,941
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	35,374,036
Accumulated Depreciation	(26,781,646)
Investment in Real Estate Net	$ 8,592,390
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
DelMarRidge [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	San Diego, CA
Real Estate And Accumulated Depreciation Units	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	3,554,417
Gross Amount Carried at close of period 12/31/2016, Land	7,801,824
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,502,593
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,304,417
Accumulated Depreciation	(13,227,515)
Investment in Real Estate Net	35,076,902
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 39,472,029
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	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	907,589
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	124,667,393
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	124,667,393
Accumulated Depreciation	(22,844,872)
Investment in Real Estate Net	$ 101,822,521
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
Fairchase [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units	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	791,751
Gross Amount Carried at close of period 12/31/2016, Land	23,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	88,514,072
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	112,014,072
Accumulated Depreciation	(15,478,802)
Investment in Real Estate Net	$ 96,535,270
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
Fairfield [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Stamford, CT
Real Estate And Accumulated Depreciation Units	263
Initial Cost to Company, Land	$ 6,510,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	39,690,120
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	7,374,368
Gross Amount Carried at close of period 12/31/2016, Land	6,510,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	47,064,488
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,574,688
Accumulated Depreciation	(30,942,121)
Investment in Real Estate Net	22,632,567
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 31,281,223
Fine Arts Building [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	100
Initial Cost to Company, Land	$ 7,817,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	26,462,772
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	335,849
Gross Amount Carried at close of period 12/31/2016, Land	7,817,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,798,621
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	34,615,621
Accumulated Depreciation	(9,960,485)
Investment in Real Estate Net	24,655,136
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 16,055,441
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	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	891,807
Gross Amount Carried at close of period 12/31/2016, Land	35,200,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	109,660,005
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	144,860,005
Accumulated Depreciation	(18,523,867)
Investment in Real Estate Net	$ 126,336,138
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
Gaia Building [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	91
Initial Cost to Company, Land	$ 7,113,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,623,826
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	253,313
Gross Amount Carried at close of period 12/31/2016, Land	7,113,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,877,139
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	32,990,139
Accumulated Depreciation	(9,605,521)
Investment in Real Estate Net	23,384,618
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 14,492,793
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	389
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	580,456
Gross Amount Carried at close of period 12/31/2016, Land	17,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	75,259,373
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,759,373
Accumulated Depreciation	(12,410,304)
Investment in Real Estate Net	80,349,069
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 96,542,458
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	201
Initial Cost to Company, Land	$ 16,047,022
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	1,928,600
Gross Amount Carried at close of period 12/31/2016, Land	16,047,022
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	50,579,563
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	66,626,585
Accumulated Depreciation	(12,285,651)
Investment in Real Estate Net	54,340,934
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 31,863,038
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	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	8,822,118
Gross Amount Carried at close of period 12/31/2016, Land	2,512,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,434,030
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,946,530
Accumulated Depreciation	(23,107,759)
Investment in Real Estate Net	10,838,771
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 46,464,853
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	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	561,221
Gross Amount Carried at close of period 12/31/2016, Land	5,425,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,699,249
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,124,249
Accumulated Depreciation	(8,325,174)
Investment in Real Estate Net	18,799,075
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 25,879,145
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	132
Initial Cost to Company, Land	$ 10,752,145
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,628,115
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	487,960
Gross Amount Carried at close of period 12/31/2016, Land	10,752,145
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,116,075
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,868,220
Accumulated Depreciation	(10,739,451)
Investment in Real Estate Net	35,128,769
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 26,218,004
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	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	3,432,035
Gross Amount Carried at close of period 12/31/2016, Land	14,100,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	28,094,918
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,194,918
Accumulated Depreciation	(11,624,548)
Investment in Real Estate Net	$ 30,570,370
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	153
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	759,840
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,010,884
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,010,884
Accumulated Depreciation	(15,478,760)
Investment in Real Estate Net	26,532,124
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 24,976,920
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	264
Initial Cost to Company, Land	$ 13,642,420
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	29,707,475
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,774,728
Gross Amount Carried at close of period 12/31/2016, Land	13,642,420
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	34,482,203
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,124,623
Accumulated Depreciation	(17,151,836)
Investment in Real Estate Net	$ 30,972,787
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	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	5,895,100
Gross Amount Carried at close of period 12/31/2016, Land	5,977,504
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	32,644,211
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	38,621,715
Accumulated Depreciation	(15,657,977)
Investment in Real Estate Net	22,963,738
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 24,947,516
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	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	1,647,551
Gross Amount Carried at close of period 12/31/2016, Land	16,382,822
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	85,464,629
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	101,847,451
Accumulated Depreciation	(23,410,128)
Investment in Real Estate Net	78,437,323
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 44,696,782
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	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	4,693,142
Gross Amount Carried at close of period 12/31/2016, Land	20,880,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	94,948,651
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	115,828,651
Accumulated Depreciation	(38,397,081)
Investment in Real Estate Net	77,431,570
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 70,777,791
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	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	1,957,762
Gross Amount Carried at close of period 12/31/2016, Land	13,740,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	42,715,063
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,455,063
Accumulated Depreciation	(16,545,350)
Investment in Real Estate Net	$ 39,909,713
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	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	1,040,629
Gross Amount Carried at close of period 12/31/2016, Land	8,540,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	13,250,610
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	21,790,610
Accumulated Depreciation	(5,406,375)
Investment in Real Estate Net	16,384,235
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 22,622,379
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	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	9,258,516
Gross Amount Carried at close of period 12/31/2016, Land	12,858,693
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	66,427,019
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	79,285,712
Accumulated Depreciation	(30,949,901)
Investment in Real Estate Net	48,335,811
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 69,242,252
Moda [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	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	875,933
Gross Amount Carried at close of period 12/31/2016, Land	12,649,228
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,717,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	50,367,173
Accumulated Depreciation	(11,291,703)
Investment in Real Estate Net	$ 39,075,470
Real Estate And Accumulated Depreciation, Encumbrances Reference	(L)
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	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	7,732,818
Gross Amount Carried at close of period 12/31/2016, Land	8,160,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,093,756
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	45,253,756
Accumulated Depreciation	(22,969,702)
Investment in Real Estate Net	$ 22,284,054
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	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	813,248
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	60,394,146
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	60,394,146
Accumulated Depreciation	(17,426,612)
Investment in Real Estate Net	42,967,534
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 42,327,373
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	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	3,486,749
Gross Amount Carried at close of period 12/31/2016, Land	4,000,159
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	97,777,339
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	101,777,498
Accumulated Depreciation	(42,656,500)
Investment in Real Estate Net	$ 59,120,998
Real Estate And Accumulated Depreciation, Encumbrances Reference	(I)
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	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	8,245,007
Gross Amount Carried at close of period 12/31/2016, Land	14,752,034
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	81,580,432
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	96,332,466
Accumulated Depreciation	(36,690,596)
Investment in Real Estate Net	59,641,870
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 49,754,197
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	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	9,695,764
Gross Amount Carried at close of period 12/31/2016, Land	71,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	221,602,905
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	293,502,905
Accumulated Depreciation	(39,044,321)
Investment in Real Estate Net	$ 254,458,584
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
Providence [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bothell, WA
Real Estate And Accumulated Depreciation Units	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	1,328,617
Gross Amount Carried at close of period 12/31/2016, Land	3,573,621
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	20,384,122
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,957,743
Accumulated Depreciation	(9,481,448)
Investment in Real Estate Net	$ 14,476,295
Real Estate And Accumulated Depreciation, Encumbrances Reference	(I)
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	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	4,133,203
Gross Amount Carried at close of period 12/31/2016, Land	10,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,946,138
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	67,446,138
Accumulated Depreciation	(26,559,665)
Investment in Real Estate Net	$ 40,886,473
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	226
Initial Cost to Company, Land	$ 6,500,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	34,585,060
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,771,158
Gross Amount Carried at close of period 12/31/2016, Land	6,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	37,356,218
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	43,856,218
Accumulated Depreciation	(17,817,428)
Investment in Real Estate Net	$ 26,038,790
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
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	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	2,674,707
Gross Amount Carried at close of period 12/31/2016, Land	16,345,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	75,755,377
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	92,100,377
Accumulated Depreciation	(31,075,305)
Investment in Real Estate Net	$ 61,025,072
Real Estate And Accumulated Depreciation, Encumbrances Reference	(I)
Reserve at Fairfax Corners [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Fairfax, VA
Real Estate And Accumulated Depreciation Units	652
Initial Cost to Company, Land	$ 15,804,057
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	63,129,051
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	10,544,380
Gross Amount Carried at close of period 12/31/2016, Land	15,804,057
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	73,673,431
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	89,477,488
Accumulated Depreciation	(35,713,995)
Investment in Real Estate Net	53,763,493
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 84,636,440
Rianna II [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	78
Initial Cost to Company, Land	$ 2,161,840
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	14,433,614
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	335,207
Gross Amount Carried at close of period 12/31/2016, Land	2,161,840
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	14,768,821
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	16,930,661
Accumulated Depreciation	(4,665,753)
Investment in Real Estate Net	12,264,908
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 9,179,918
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	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	6,960,564
Gross Amount Carried at close of period 12/31/2016, Land	8,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,043,588
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	39,943,588
Accumulated Depreciation	(18,827,023)
Investment in Real Estate Net	21,116,565
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 64,374,172
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	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	5,142,411
Gross Amount Carried at close of period 12/31/2016, Land	3,380,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	27,095,274
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,475,274
Accumulated Depreciation	(15,457,341)
Investment in Real Estate Net	15,017,933
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 47,170,890
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	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	5,784,763
Gross Amount Carried at close of period 12/31/2016, Land	79,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	183,101,740
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	263,001,740
Accumulated Depreciation	(31,584,442)
Investment in Real Estate Net	$ 231,417,298
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
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	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	18,949
Gross Amount Carried at close of period 12/31/2016, Land	7,222,544
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	26,296,405
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,518,949
Accumulated Depreciation	(3,222,469)
Investment in Real Estate Net	$ 30,296,480
Real Estate And Accumulated Depreciation, Encumbrances Reference	(L)
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	280
Initial Cost to Company, Land	$ 2,629,804
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	7,407,026
Gross Amount Carried at close of period 12/31/2016, Land	2,629,804
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	31,077,915
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	33,707,719
Accumulated Depreciation	(21,189,393)
Investment in Real Estate Net	12,518,326
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 37,994,251
Talleyrand [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Tarrytown, NY
Real Estate And Accumulated Depreciation Units	300
Initial Cost to Company, Land	$ 12,000,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	49,838,160
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,280,338
Gross Amount Carried at close of period 12/31/2016, Land	12,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	55,118,498
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	67,118,498
Accumulated Depreciation	(29,826,719)
Investment in Real Estate Net	37,291,779
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 34,794,181
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	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	3,924,692
Gross Amount Carried at close of period 12/31/2016, Land	28,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	65,841,362
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	94,441,362
Accumulated Depreciation	(27,199,505)
Investment in Real Estate Net	67,241,857
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 39,353,690
Toscana [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Irvine, CA
Real Estate And Accumulated Depreciation Units	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	13,015,608
Gross Amount Carried at close of period 12/31/2016, Land	39,410,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	63,821,680
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	103,231,680
Accumulated Depreciation	(35,049,666)
Investment in Real Estate Net	68,182,014
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 98,021,589
Touriel Building [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Berkeley, CA
Real Estate And Accumulated Depreciation Units	35
Initial Cost to Company, Land	$ 2,736,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,810,027
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	178,396
Gross Amount Carried at close of period 12/31/2016, Land	2,736,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	7,988,423
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	10,724,423
Accumulated Depreciation	(3,056,587)
Investment in Real Estate Net	7,667,836
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 4,965,054
Town Square at Mark Center I (fka Millbrook I) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Alexandria, VA
Real Estate And Accumulated Depreciation Units	406
Initial Cost to Company, Land	$ 24,360,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	86,178,714
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	5,090,465
Gross Amount Carried at close of period 12/31/2016, Land	24,360,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	91,269,179
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	115,629,179
Accumulated Depreciation	(37,802,676)
Investment in Real Estate Net	77,826,503
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 60,195,391
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	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	126,527
Gross Amount Carried at close of period 12/31/2016, Land	42,580,326
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	56,141,201
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	98,721,527
Accumulated Depreciation	(5,287,978)
Investment in Real Estate Net	93,433,549
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 42,297,038
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	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	6,676,131
Gross Amount Carried at close of period 12/31/2016, Land	12,650,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,332,423
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	52,982,423
Accumulated Depreciation	(19,770,723)
Investment in Real Estate Net	33,211,700
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 30,337,321
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	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	1,443,140
Gross Amount Carried at close of period 12/31/2016, Land	10,590,975
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,852,165
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	56,443,140
Accumulated Depreciation	(14,149,083)
Investment in Real Estate Net	42,294,057
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 45,950,109
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	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	651,436
Gross Amount Carried at close of period 12/31/2016, Land	10,350,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	36,084,873
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	46,434,873
Accumulated Depreciation	(13,516,691)
Investment in Real Estate Net	$ 32,918,182
Real Estate And Accumulated Depreciation, Encumbrances Reference	(J)
Vintage [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ontario, CA
Real Estate And Accumulated Depreciation Units	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	991,090
Gross Amount Carried at close of period 12/31/2016, Land	7,059,230
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	48,668,852
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	55,728,082
Accumulated Depreciation	(18,740,063)
Investment in Real Estate Net	36,988,019
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 32,972,257
Vintage at 425 Broadway (fka Promenade) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Santa Monica, CA
Real Estate And Accumulated Depreciation Units	58
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	1,059,233
Gross Amount Carried at close of period 12/31/2016, Land	9,000,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,020,756
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,020,756
Accumulated Depreciation	(2,968,658)
Investment in Real Estate Net	$ 21,052,098
Real Estate And Accumulated Depreciation, Encumbrances Reference	(K)
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	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	1,803,032
Gross Amount Carried at close of period 12/31/2016, Land	60,900,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	49,996,869
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	110,896,869
Accumulated Depreciation	(10,859,764)
Investment in Real Estate Net	100,037,105
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 47,159,623
Westgate (fka Westgate I) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pasadena, CA
Real Estate And Accumulated Depreciation Units	480
Initial Cost to Company, Land	$ 22,898,848
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	133,559,573
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,626,531
Gross Amount Carried at close of period 12/31/2016, Land	22,898,848
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	135,186,104
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	158,084,952
Accumulated Depreciation	(27,829,027)
Investment in Real Estate Net	130,255,925
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 95,942,439
Woodleaf [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Campbell, CA
Real Estate And Accumulated Depreciation Units	178
Initial Cost to Company, Land	$ 8,550,600
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,988,183
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	4,564,556
Gross Amount Carried at close of period 12/31/2016, Land	8,550,600
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	21,552,739
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,103,339
Accumulated Depreciation	(13,279,360)
Investment in Real Estate Net	16,823,979
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 17,803,590
Portfolio Entity Encumbrances [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units
Initial Cost to Company, Land
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures
Gross Amount Carried at close of period 12/31/2016, Land
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures
Accumulated Depreciation
Investment in Real Estate Net
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 1,645,978,887
Investment in Real Estate - Wholly Owned Encumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units	21,196
Initial Cost to Company, Land	$ 1,542,126,523
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,432,306,521
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	317,352,468
Gross Amount Carried at close of period 12/31/2016, Land	1,542,126,523
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	4,749,658,989
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	6,291,785,512
Accumulated Depreciation	(1,497,361,379)
Investment in Real Estate Net	4,794,424,133
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 3,818,071,013
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	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	6,364,098
Gross Amount Carried at close of period 12/31/2016, Land	796,800
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	13,537,823
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	14,334,623
Accumulated Depreciation	(10,501,930)
Investment in Real Estate Net	3,832,693
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	162
Initial Cost to Company, Land	$ 4,869,448
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,955,064
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	3,764,545
Gross Amount Carried at close of period 12/31/2016, Land	4,869,448
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	15,719,609
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	20,589,057
Accumulated Depreciation	(9,906,118)
Investment in Real Estate Net	10,682,939
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	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	6,382,976
Gross Amount Carried at close of period 12/31/2016, Land	6,105,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	35,944,841
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	42,049,841
Accumulated Depreciation	(18,330,095)
Investment in Real Estate Net	23,719,746
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Harrison Square (fka Elliot Bay) [Domain]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Seattle, WA
Real Estate And Accumulated Depreciation Units	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	4,889,669
Gross Amount Carried at close of period 12/31/2016, Land	7,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	40,734,014
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	48,334,014
Accumulated Depreciation	(7,462,882)
Investment in Real Estate Net	40,871,132
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Monterra in Mill Creek [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Mill Creek, WA
Real Estate And Accumulated Depreciation Units	139
Initial Cost to Company, Land	$ 2,800,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	13,255,123
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	935,693
Gross Amount Carried at close of period 12/31/2016, Land	2,800,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	14,190,816
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	16,990,816
Accumulated Depreciation	(6,101,965)
Investment in Real Estate Net	10,888,851
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	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	3,246,786
Gross Amount Carried at close of period 12/31/2016, Land	5,460,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	18,968,356
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	24,428,356
Accumulated Depreciation	(11,421,082)
Investment in Real Estate Net	13,007,274
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Strayhorse at Arrowhead Ranch [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Glendale, AZ
Real Estate And Accumulated Depreciation Units	136
Initial Cost to Company, Land	$ 4,400,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,968,002
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	699,374
Gross Amount Carried at close of period 12/31/2016, Land	4,400,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	13,667,376
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	18,067,376
Accumulated Depreciation	(5,724,191)
Investment in Real Estate Net	12,343,185
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Via Ventura (CA) (fka Ventura) [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Ventura, CA
Real Estate And Accumulated Depreciation Units	192
Initial Cost to Company, Land	$ 8,600,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,308,202
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	703,519
Gross Amount Carried at close of period 12/31/2016, Land	8,600,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	45,011,721
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	53,611,721
Accumulated Depreciation	(9,035,652)
Investment in Real Estate Net	44,576,069
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Wood Creek II (fka Willow Brook (CA))
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Pleasant Hill, CA
Real Estate And Accumulated Depreciation Units	228
Initial Cost to Company, Land	$ 5,055,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	38,388,672
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	6,380,861
Gross Amount Carried at close of period 12/31/2016, Land	5,055,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	44,769,533
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	49,824,533
Accumulated Depreciation	(20,343,063)
Investment in Real Estate Net	29,481,470
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 0
Investment in Real Estate - Partially Owned Unencumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units	1,527
Initial Cost to Company, Land	$ 45,686,248
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	209,176,568
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	33,367,521
Gross Amount Carried at close of period 12/31/2016, Land	45,686,248
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	242,544,089
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	288,230,337
Accumulated Depreciation	(98,826,978)
Investment in Real Estate Net	189,403,359
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	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	5,224,512
Gross Amount Carried at close of period 12/31/2016, Land	4,507,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,799,326
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	22,306,426
Accumulated Depreciation	(12,054,134)
Investment in Real Estate Net	10,252,292
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 16,493,902
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	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	7,124,649
Gross Amount Carried at close of period 12/31/2016, Land	5,425,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,936,769
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	31,361,769
Accumulated Depreciation	(14,964,999)
Investment in Real Estate Net	16,396,770
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,108,382
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	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	6,190,412
Gross Amount Carried at close of period 12/31/2016, Land	6,945,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	29,255,388
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	36,200,388
Accumulated Depreciation	(16,167,257)
Investment in Real Estate Net	20,033,131
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 36,395,508
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	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	5,003,636
Gross Amount Carried at close of period 12/31/2016, Land	5,345,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	25,394,254
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	30,739,254
Accumulated Depreciation	(14,020,421)
Investment in Real Estate Net	16,718,833
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 28,811,122
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	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	4,440,120
Gross Amount Carried at close of period 12/31/2016, Land	4,550,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	22,504,884
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	27,054,884
Accumulated Depreciation	(12,562,453)
Investment in Real Estate Net	14,492,431
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 26,116,380
Surrey Downs [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Bellevue, WA
Real Estate And Accumulated Depreciation Units	122
Initial Cost to Company, Land	$ 3,057,100
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,848,618
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	2,931,955
Gross Amount Carried at close of period 12/31/2016, Land	3,057,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	10,780,573
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	13,837,673
Accumulated Depreciation	(6,893,799)
Investment in Real Estate Net	6,943,874
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 9,801,248
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	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	2,761,807
Gross Amount Carried at close of period 12/31/2016, Land	5,500,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	17,978,420
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	23,478,420
Accumulated Depreciation	(7,925,733)
Investment in Real Estate Net	15,552,687
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 9,869,581
Wisconsin Place [Domain]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Description Of Location	Chevy Chase, MD
Real Estate And Accumulated Depreciation Units	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	1,021,679
Gross Amount Carried at close of period 12/31/2016, Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	173,111,034
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	173,111,034
Accumulated Depreciation	(27,622,092)
Investment in Real Estate Net	145,488,942
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 145,513,689
Investment in Real Estate - Partially Owned Encumbered [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units	1,688
Initial Cost to Company, Land	$ 35,329,200
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	288,061,878
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	34,698,770
Gross Amount Carried at close of period 12/31/2016, Land	35,329,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	322,760,648
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	358,089,848
Accumulated Depreciation	(112,210,888)
Investment in Real Estate Net	245,878,960
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 301,109,812
Total Consolidated Investment in Real Estate [Member]
Real Estate And Accumulated Depreciation Abstract
Real Estate And Accumulated Depreciation Units	76,513
Initial Cost to Company, Land	$ 6,100,178,215
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,959,193,878
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures	1,327,053,382
Gross Amount Carried at close of period 12/31/2016, Land	6,100,178,215
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures	19,286,247,260
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures	25,386,425,475
Accumulated Depreciation	(5,360,389,416)
Investment in Real Estate Net	20,026,036,059
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances	$ 4,119,180,825
Partially Owned Properties – Unconsolidated
Real Estate And Accumulated Depreciation Abstract
Partially Owned Properties	2
Apartment Units	945
Depreciable Property [Member]
Real Estate and Accumulated Depreciation [Line Items]
Furniture, fixtures and equipment	$ 1,346,300,284
Building [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	30
Renovations and Improvements Minimum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	5
Renovations and Improvements Maximum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	15
Replacements Minimum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	5
Replacements Maximum [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	10
Management Business Renovations and Improvements Minimum [Member] [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	3
Management Business Renovations and Improvements Maximum [Member] [Member]
Real Estate And Accumulated Depreciation Abstract
Property, Plant and Equipment, Estimated Useful Lives	7