Organization, Basis of Presentation, and Significant Accounting Policies - Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Basic and diluted shares outstanding
Weighted average common shares - basic (in shares)	142,000,934	141,307,186	139,634,294
Weighted average DownREIT units outstanding (in shares)	0	3,503	7,500
Effect of dilutive securities (in shares)	457,670	333,099	333,293
Weighted average common shares - diluted (in shares)	142,458,604	141,643,788	139,975,087
Calculation of Earnings per Common Share—basic
Net income attributable to common stockholders	$ 1,081,994	$ 928,825	$ 1,136,775
Net income allocated to unvested restricted shares	(2,069)	(1,663)	(2,091)
Net income attributable to common stockholders—basic	$ 1,079,925	$ 927,162	$ 1,134,684
Weighted average common shares - basic (in shares)	142,000,934	141,307,186	139,634,294
Earnings per common share - basic (in dollars per share)	$ 7.61	$ 6.56	$ 8.13
Calculation of Earnings per Common Share—diluted
Net income attributable to common stockholders	$ 1,081,994	$ 928,825	$ 1,136,775
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations	0	25	48
Net income attributable to common stockholders—diluted	$ 1,081,994	$ 928,850	$ 1,136,823
Weighted average common shares - diluted (in shares)	142,458,604	141,643,788	139,975,087
Earnings per common share - diluted (in dollars per share)	$ 7.60	$ 6.56	$ 8.12
Antidilutive securities excluded from computation of earnings per share	9,793	303,784	291,881