NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Noncontrolling interests
Minimum holding period prior to redemption (in years)	1 year
Redeemable noncontrolling interests in the Operating Partnership
Redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership, at beginning of year	$ 961,087
Mark-to-market adjustment to redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership	(14,629)	$ 67,749
Conversion of OP Units/DownREIT Units to Common Stock or Cash	(7,288)
Net income/(loss) attributable to redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership	3,149	1,953
Distributions to redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership	(10,712)
Redeemable Long-Term and Short-Term Incentive Plan Units	5,356
Allocation of other comprehensive income/(loss)	348
Redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership, at end of year	937,311
Net (income)/loss attributable to noncontrolling interests	(12)	(8)
Maximum
Redeemable noncontrolling interests in the Operating Partnership
Net (income)/loss attributable to noncontrolling interests	$ (100)	$ (100)