Organization, Basis of Presentation and Significant Accounting Policies - Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic and diluted shares outstanding
Weighted average common shares - basic (in shares)	139,766,727	139,559,904
Weighted average DownREIT units outstanding (in shares)	7,500	7,500
Effect of dilutive securities (in shares)	249,583	408,678
Weighted average common shares - diluted (in shares)	140,023,810	139,976,082
Calculation of Earnings per Share - basic
Net income attributable to common stockholders	$ 146,902	$ 262,044
Net income allocated to unvested restricted shares	(267)	(523)
Net income attributable to common stockholders - basic	$ 146,635	$ 261,521
Weighted average common shares - basic (in shares)	139,766,727	139,559,904
Earnings per common share - basic (in dollars per share)	$ 1.05	$ 1.87
Calculation of Earnings per Share - diluted
Net income attributable to common stockholders	$ 146,902	$ 262,044
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations	12	12
Net income attributable to common stockholders - diluted	$ 146,914	$ 262,056
Weighted average common shares - diluted (in shares)	140,023,810	139,976,082
Earnings per common share - diluted (in dollars per share)	$ 1.05	$ 1.87
Antidilutive securities excluded from the computation of earnings per share (in shares)	307,625	9,793