Consolidated Statement Of Shareholders' Equity - USD ($) $ in Thousands	Total	downREIT OP units	Preferred Shares	Common Shares	Common Shares downREIT OP units	Additional Paid-in Capital	Additional Paid-in Capital downREIT OP units	Accumulated Dividends in Excess of Net Income	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Noncontrolling Interests downREIT OP units
Beginning balance (in shares) at Dec. 31, 2023			398,878	82,775,286
Beginning balance at Dec. 31, 2023	$ 3,042,159		$ 159,822	$ 833		$ 3,959,276		$ (1,160,474)	$ 4,052	$ 78,650
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests	230,953							229,671		1,282
Other comprehensive income (loss) - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(1,880)								(1,880)
Dividends declared to common shareholders	(275,006)							(275,006)
Dividends declared to preferred shareholders	(6,024)							(6,024)
Distributions declared to noncontrolling interests, excluding amounts attributable to redeemable noncontrolling interests	(3,183)									(3,183)
Common shares issued, net (in shares)				2,059,775
Common shares issued, net	222,319			$ 21		222,298
Shares issued under dividend reinvestment plan (in shares)				13,975
Shares issued under dividend reinvestment plan	1,323					1,323
Share-based compensation expense, net of forfeitures (in shares)				148,462
Share-based compensation expense, net of forfeitures	11,952			$ 1		11,951
Shares withheld for employee taxes (in shares)				(49,120)
Shares withheld for employee taxes	(4,972)					(4,972)
Conversion downREIT OP units (in Shares)					4,160
Conversion of downREIT OP units							$ 287
Purchase of noncontrolling interest	(12,358)	$ (960)				(10,264)				(2,094)	$ (1,247)
Contributions from noncontrolling interests	725									725
Purchase of capped calls	(19,448)					(19,448)
Ending balance (in shares) at Sep. 30, 2024			398,878	84,952,538
Ending balance at Sep. 30, 2024	3,185,600		$ 159,822	$ 855		4,160,451		(1,211,833)	2,172	74,133
Beginning balance (in shares) at Jun. 30, 2024			398,878	83,590,543
Beginning balance at Jun. 30, 2024	3,070,813		$ 159,822	$ 841		4,005,249		(1,177,336)	7,042	75,195
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests	61,719							60,953		766
Other comprehensive income (loss) - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(4,870)								(4,870)
Dividends declared to common shareholders	(93,442)							(93,442)
Dividends declared to preferred shareholders	(2,008)							(2,008)
Distributions declared to noncontrolling interests, excluding amounts attributable to redeemable noncontrolling interests	(1,293)									(1,293)
Common shares issued, net (in shares)				1,358,977
Common shares issued, net	151,389			$ 14		151,375
Shares issued under dividend reinvestment plan (in shares)				4,542
Shares issued under dividend reinvestment plan	476					476
Share-based compensation expense, net of forfeitures (in shares)				1,080
Share-based compensation expense, net of forfeitures	3,777					3,777
Shares withheld for employee taxes (in shares)				(2,604)
Shares withheld for employee taxes	(286)					(286)
Purchase of noncontrolling interest		$ (675)					$ (140)				$ (535)
Ending balance (in shares) at Sep. 30, 2024			398,878	84,952,538
Ending balance at Sep. 30, 2024	3,185,600		$ 159,822	$ 855		4,160,451		(1,211,833)	2,172	74,133
Beginning balance (in shares) at Dec. 31, 2024			398,878	85,666,220
Beginning balance at Dec. 31, 2024	3,244,144		$ 159,822	$ 862		4,248,824		(1,242,654)	4,740	72,550
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests	285,031							281,333		3,698
Other comprehensive income (loss) - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(2,508)								(2,508)
Dividends declared to common shareholders	(287,282)							(287,282)
Dividends declared to preferred shareholders	(6,024)							(6,024)
Distributions declared to noncontrolling interests, excluding amounts attributable to redeemable noncontrolling interests	(3,334)									(3,334)
Common shares issued, net (in shares)				476,665
Common shares issued, net	54,306			$ 5		54,301
Shares issued under dividend reinvestment plan (in shares)				14,288
Shares issued under dividend reinvestment plan	1,368					1,368
Share-based compensation expense, net of forfeitures (in shares)				151,729
Share-based compensation expense, net of forfeitures	11,634			$ 2		11,632
Shares withheld for employee taxes (in shares)				(44,497)
Shares withheld for employee taxes	(4,856)					(4,856)
Conversion downREIT OP units (in Shares)					1,158
Purchase of noncontrolling interest	(7,334)					(5,007)				(2,327)
Ending balance (in shares) at Sep. 30, 2025			398,878	86,265,563
Ending balance at Sep. 30, 2025	3,285,145		$ 159,822	$ 869		4,306,262		(1,254,627)	2,232	70,587
Beginning balance (in shares) at Jun. 30, 2025			398,878	86,261,214
Beginning balance at Jun. 30, 2025	3,320,100		$ 159,822	$ 869		4,302,220		(1,216,794)	2,912	71,071
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests	62,513							61,649		864
Other comprehensive income (loss) - change in fair value of interest rate swaps, excluding portion attributable to redeemable noncontrolling interests	(680)								(680)
Dividends declared to common shareholders	(97,474)							(97,474)
Dividends declared to preferred shareholders	(2,008)							(2,008)
Distributions declared to noncontrolling interests, excluding amounts attributable to redeemable noncontrolling interests	(1,110)									(1,110)
Common shares issued, net (in shares)				56
Common shares issued, net	(86)			$ 0		(86)
Shares issued under dividend reinvestment plan (in shares)				4,874
Shares issued under dividend reinvestment plan	461					461
Share-based compensation expense, net of forfeitures (in shares)				1,379
Share-based compensation expense, net of forfeitures	3,691			$ 0		3,691
Shares withheld for employee taxes (in shares)				(1,960)
Shares withheld for employee taxes	(181)					(181)
Purchase of noncontrolling interest	(81)					157				(238)
Ending balance (in shares) at Sep. 30, 2025			398,878	86,265,563
Ending balance at Sep. 30, 2025	$ 3,285,145		$ 159,822	$ 869		$ 4,306,262		$ (1,254,627)	$ 2,232	$ 70,587