Organization, Basis of Presentation and Significant Accounting Policies - Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Basic and diluted shares outstanding
Weighted average common shares - basic (in shares)	142,038,838			141,838,841			141,981,920	141,128,506
Weighted average DownREIT units outstanding (in shares)	0			0			0	4,670
Effect of dilutive securities (in shares)	477,846			359,258			394,514	315,499
Weighted average common shares - diluted (in shares)	142,516,684			142,198,099			142,376,434	141,448,675
Calculation of Earnings per Common Share - basic
Net income attributable to common stockholders	$ 372,519	$ 253,934	$ 173,449	$ 172,031	$ 367,923	$ 146,902	$ 799,902	$ 686,856
Net income allocated to unvested restricted shares	(706)			(309)			(1,537)	(1,229)
Net income attributable to common stockholders - basic	$ 371,813			$ 171,722			$ 798,365	$ 685,627
Weighted average common shares - basic (in shares)	142,038,838			141,838,841			141,981,920	141,128,506
Earnings per common share - basic (in dollars per share)	$ 2.62			$ 1.21			$ 5.62	$ 4.86
Calculation of Earnings per Common Share - diluted
Net income attributable to common stockholders	$ 372,519	$ 253,934	$ 173,449	$ 172,031	$ 367,923	$ 146,902	$ 799,902	$ 686,856
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations	0			0			0	25
Net income attributable to common stockholders - diluted	$ 372,519			$ 172,031			$ 799,902	$ 686,881
Weighted average common shares - diluted (in shares)	142,516,684			142,198,099			142,376,434	141,448,675
Earnings per common share - diluted (in dollars per share)	$ 2.61			$ 1.21			$ 5.62	$ 4.86
Common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of earnings per share (in shares)							9,793	25,537
Forward Contracts
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the computation of earnings per share (in shares)							3,757,922