CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Cumulative Dividends In Excess Of Earnings	Accumulated Other Comprehensive Income (Loss)	Total Stockholders’ Equity	Total Noncontrolling Interests	Cumulative Effect, Period of Adoption, Adjustment		Cumulative Effect, Period of Adoption, Adjustment Cumulative Dividends In Excess Of Earnings		Cumulative Effect, Period of Adoption, Adjustment Total Stockholders’ Equity		Cumulative Effect, Period of Adoption, Adjusted Balance	Cumulative Effect, Period of Adoption, Adjusted Balance Common Stock	Cumulative Effect, Period of Adoption, Adjusted Balance Additional Paid-In Capital	Cumulative Effect, Period of Adoption, Adjusted Balance Cumulative Dividends In Excess Of Earnings	Cumulative Effect, Period of Adoption, Adjusted Balance Accumulated Other Comprehensive Income (Loss)	Cumulative Effect, Period of Adoption, Adjusted Balance Total Stockholders’ Equity	Cumulative Effect, Period of Adoption, Adjusted Balance Total Noncontrolling Interests
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Balance at Dec. 31, 2018	$ 6,512,591	$ 477,496	$ 8,398,847	$ (2,927,196)	$ (4,708)	$ 5,944,439	$ 568,152	$ 590	[1]	$ 590	[1]	$ 590	[1]	$ 6,513,181	$ 477,496	$ 8,398,847	$ (2,926,606)	$ (4,708)	$ 5,945,029	$ 568,152
Balance (in shares) at Dec. 31, 2018		477,496													477,496
Increase (Decrease) in Stockholders' Equity
Net income (loss)	55,010			47,873		47,873	7,137
Other comprehensive income (loss)	249				249	249
Issuance of common stock, net	406,813	$ 13,569	393,244			406,813
Issuance of common stock, net (in shares)		13,569
Conversion of DownREIT units to common stock	0	$ 184	3,890			4,074	(4,074)
Conversion of DownREIT units to common stock (in shares)		184
Repurchase of common stock	(4,582)	$ (149)	(4,433)			(4,582)
Repurchase of common stock (in shares)		(149)
Exercise of stock options	219	$ 9	210			219
Exercise of stock options (in shares)		9
Amortization of deferred compensation	10,358		10,358			10,358
Common dividends (usd per share)	(354,550)			(354,550)		(354,550)
Distributions to noncontrolling interests	(9,823)						(9,823)
Issuances of noncontrolling interests	3,615						3,615
Purchase of noncontrolling interests	(1,218)		(1,079)			(1,079)	(139)
Balance at Jun. 30, 2019	$ 6,619,272	$ 491,109	8,801,037	(3,233,283)	(4,459)	6,054,404	564,868
Balance (in shares) at Jun. 30, 2019		491,109
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance at Dec. 31, 2018	$ 6,512,591	$ 477,496	8,398,847	(2,927,196)	(4,708)	5,944,439	568,152	590	[1]	590	[1]	590	[1]	6,513,181	$ 477,496	8,398,847	(2,926,606)	(4,708)	5,945,029	568,152
Balance (in shares) at Dec. 31, 2018		477,496													477,496
Balance at Dec. 31, 2019	6,667,474	$ 505,222	9,183,892	(3,601,199)	(2,857)	6,085,058	582,416	(1,524)	[2]	(1,524)	[2]	(1,524)	[2]	6,665,950	$ 505,222	9,183,892	(3,602,723)	(2,857)	6,083,534	582,416
Balance (in shares) at Dec. 31, 2019		505,222													505,222
Balance at Mar. 31, 2019	6,399,065	$ 477,929	8,405,258	(3,042,422)	(3,883)	5,836,882	562,183
Balance (in shares) at Mar. 31, 2019		477,929
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(9,980)			(13,597)		(13,597)	3,617
Other comprehensive income (loss)	(576)				(576)	(576)
Issuance of common stock, net	405,281	$ 13,227	392,054			405,281
Issuance of common stock, net (in shares)		13,227
Repurchase of common stock	(1,663)	$ (54)	(1,609)			(1,663)
Repurchase of common stock (in shares)		(54)
Exercise of stock options	173	$ 7	166			173
Exercise of stock options (in shares)		7
Amortization of deferred compensation	6,247		6,247			6,247
Common dividends (usd per share)	(177,264)			(177,264)		(177,264)
Distributions to noncontrolling interests	(4,408)						(4,408)
Issuances of noncontrolling interests	3,615						3,615
Purchase of noncontrolling interests	(1,218)		(1,079)			(1,079)	(139)
Balance at Jun. 30, 2019	6,619,272	$ 491,109	8,801,037	(3,233,283)	(4,459)	6,054,404	564,868
Balance (in shares) at Jun. 30, 2019		491,109
Balance at Dec. 31, 2019	6,667,474	$ 505,222	9,183,892	(3,601,199)	(2,857)	6,085,058	582,416	(1,524)	[2]	(1,524)	[2]	(1,524)	[2]	6,665,950	$ 505,222	9,183,892	(3,602,723)	(2,857)	6,083,534	582,416
Balance (in shares) at Dec. 31, 2019		505,222													505,222
Balance at Mar. 31, 2020	$ 7,813,443	$ 538,135	10,213,011	(3,512,143)	(2,495)	7,236,508	576,935
Balance (in shares) at Mar. 31, 2020		538,135
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Balance at Dec. 31, 2019	$ 6,667,474	$ 505,222	9,183,892	(3,601,199)	(2,857)	6,085,058	582,416	$ (1,524)	[2]	$ (1,524)	[2]	$ (1,524)	[2]	$ 6,665,950	$ 505,222	$ 9,183,892	$ (3,602,723)	$ (2,857)	$ 6,083,534	$ 582,416
Balance (in shares) at Dec. 31, 2019		505,222													505,222
Increase (Decrease) in Stockholders' Equity
Net income (loss)	337,589			330,586		330,586	7,003
Other comprehensive income (loss)	671				671	671
Issuance of common stock, net	1,065,389	$ 33,201	1,032,188			1,065,389
Issuance of common stock, net (in shares)		33,201
Conversion of DownREIT units to common stock	0	$ 120	3,957			4,077	(4,077)
Conversion of DownREIT units to common stock (in shares)		120
Repurchase of common stock	(9,998)	$ (279)	(9,719)			(9,998)
Repurchase of common stock (in shares)		(279)
Exercise of stock options	1,806	$ 54	1,752			1,806
Exercise of stock options (in shares)		54
Amortization of deferred compensation	10,658		10,658			10,658
Common dividends (usd per share)	(388,050)			(388,050)		(388,050)
Distributions to noncontrolling interests	(15,294)						(15,294)
Balance at Jun. 30, 2020	7,668,721	$ 538,318	10,222,728	(3,660,187)	(2,186)	7,098,673	570,048
Balance (in shares) at Jun. 30, 2020		538,318
Balance at Mar. 31, 2020	7,813,443	$ 538,135	10,213,011	(3,512,143)	(2,495)	7,236,508	576,935
Balance (in shares) at Mar. 31, 2020		538,135
Increase (Decrease) in Stockholders' Equity
Net income (loss)	55,049			51,506		51,506	3,543
Other comprehensive income (loss)	309				309	309
Issuance of common stock, net	767	$ 97	670			767
Issuance of common stock, net (in shares)		97
Conversion of DownREIT units to common stock	0	$ 97	3,471			3,568	(3,568)
Conversion of DownREIT units to common stock (in shares)		97
Repurchase of common stock	(261)	$ (11)	(250)			(261)
Repurchase of common stock (in shares)		(11)
Amortization of deferred compensation	5,826		5,826			5,826
Common dividends (usd per share)	(199,550)			(199,550)		(199,550)
Distributions to noncontrolling interests	(6,862)						(6,862)
Balance at Jun. 30, 2020	$ 7,668,721	$ 538,318	$ 10,222,728	$ (3,660,187)	$ (2,186)	$ 7,098,673	$ 570,048
Balance (in shares) at Jun. 30, 2020		538,318

[1] On January 1, 2019, the Company adopted a series of ASUs related to accounting for leases and recognized the cumulative-effect of adoption to beginning retained earnings. Refer to Note 2 for a detailed impact of adoption.

[2] On January 1, 2020, the Company adopted a series of Accounting Standards Updates (“ASUs”) related to accounting for credit losses and recognized the cumulative-effect of adoption to beginning retained earnings. Refer to Note 2 for a detailed impact of adoption.