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
Increase (Decrease) in Stockholders' Equity
Impact of adoption of ASUs	[1]	$ 590			$ 590		$ 590
Adjusted balance, January 1		6,513,181	$ 477,496	$ 8,398,847	(2,926,606)	$ (4,708)	5,945,029	$ 568,152
Balance at Dec. 31, 2018		6,512,591	$ 477,496	8,398,847	(2,927,196)	(4,708)	5,944,439	568,152
Balance (in shares) at Dec. 31, 2018			477,496
Increase (Decrease) in Stockholders' Equity
Net income (loss)		64,990			61,470		61,470	3,520
Other comprehensive income (loss)		825				825	825
Issuance of common stock, net		1,532	$ 342	1,190			1,532
Issuance of common stock, net (in shares)			342
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		(2,919)	$ (95)	(2,824)			(2,919)
Repurchase of common stock (in shares)			(95)
Exercise of stock options		46	$ 2	44			46
Exercise of stock options (in shares)			2
Amortization of deferred compensation		4,111		4,111			4,111
Common dividends (usd per share)		(177,286)			(177,286)		(177,286)
Distributions to noncontrolling interests		(5,415)						(5,415)
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
Balance at Dec. 31, 2018		6,512,591	$ 477,496	8,398,847	(2,927,196)	(4,708)	5,944,439	568,152
Balance (in shares) at Dec. 31, 2018			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
Balance (in shares) at Dec. 31, 2019			505,222
Increase (Decrease) in Stockholders' Equity
Impact of adoption of ASUs	[2]	(1,524)			(1,524)		(1,524)
Adjusted balance, January 1		6,665,950	$ 505,222	9,183,892	(3,602,723)	(2,857)	6,083,534	582,416
Net income (loss)		282,540			279,080		279,080	3,460
Other comprehensive income (loss)		362				362	362
Issuance of common stock, net		1,064,622	$ 33,104	1,031,518			1,064,622
Issuance of common stock, net (in shares)			33,104
Conversion of DownREIT units to common stock		0	$ 23	486			509	(509)
Conversion of DownREIT units to common stock (in shares)			23
Repurchase of common stock		(9,737)	$ (268)	(9,469)			(9,737)
Repurchase of common stock (in shares)			(268)
Exercise of stock options		1,806	$ 54	1,752			1,806
Exercise of stock options (in shares)			54
Amortization of deferred compensation		4,832		4,832			4,832
Common dividends (usd per share)		(188,500)			(188,500)		(188,500)
Distributions to noncontrolling interests		(8,432)						(8,432)
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

[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.