Earnings Per Share - Summary of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Numerator for basic earnings per share - net income (loss) attributable to common stockholders		$ 103,040	$ 89,784	$ 128,713	$ 151,709
Adjustment for net income (loss) attributable to OP Units and DownREIT Units		(157)	228	(167)	106
Numerator for diluted earnings per share		$ 102,883	$ 90,012	$ 128,546	$ 151,815
Denominator for basic earnings per share - weighted average shares (in shares)		499,023,000	454,327,000	495,561,000	450,865,000
Effect of dilutive securities:
Employee stock options (in shares)		28,000	40,000	16,000	36,000
Non-vested restricted shares and units (in shares)		1,044,000	1,166,000	882,000	1,070,000
OP units and DownREIT Units (in shares)		1,850,000	1,526,000	1,818,000	1,461,000
Employee stock purchase program (in shares)		25,000	23,000	28,000	23,000
Dilutive potential common shares (in shares)		2,947,000	2,755,000	2,744,000	2,590,000
Denominator for diluted earnings per share - adjusted weighted average shares (in shares)		501,970,000	457,082,000	498,305,000	453,455,000
Basic earnings per share (in dollars per share)		$ 0.21	$ 0.20	$ 0.26	$ 0.34
Diluted earnings per share (in dollars per share)	[1]	$ 0.20	$ 0.20	$ 0.26	$ 0.33
Forward sales agreement
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)				0	17,636,290

[1] Includes adjustment to the numerator for income (loss) attributable to OP Units and DownREIT Units.