CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
REVENUES:
Rental income	$ 398,307	$ 356,181
Joint venture management and other fees	$ 1,242	$ 1,085
Type of revenue	udr:ManagementAndOtherFeesMember	udr:ManagementAndOtherFeesMember
Total revenues	$ 399,549	$ 357,266
OPERATING EXPENSES:
Property operating and maintenance	64,834	58,484
Real estate taxes and insurance	57,970	53,764
Property management	12,945	11,576
Other operating expenses	3,032	4,712
Real estate depreciation and amortization	169,300	163,622
General and administrative	17,480	14,908
Casualty-related charges/(recoveries), net	4,156	(765)
Other depreciation and amortization	3,649	3,075
Total operating expenses	333,366	309,376
Gain/(loss) on sale of real estate owned	1	0
Operating income	66,184	47,890
Income/(loss) from unconsolidated entities	9,707	5,412
Interest expense	(43,742)	(35,916)
Interest income and other income/(expense), net	1,010	(2,440)
Income/(loss) before income taxes	33,159	14,946
Tax (provision)/benefit, net	(234)	(343)
Net income/(loss)	32,925	14,603
Net (income)/loss attributable to redeemable noncontrolling interests in the Operating Partnership and DownREIT Partnership	(1,953)	(879)
Net income/(loss) attributable to noncontrolling interests	(8)	(19)
Net income/(loss) attributable to UDR, Inc.	30,964	13,705
Distributions to preferred stockholders - Series E (Convertible)	(1,183)	(1,092)
Net income/(loss) attributable to common stockholders	$ 29,781	$ 12,613
Income/(loss) per weighted average common share - basic	$ 0.09	$ 0.04
Income/(loss) per weighted average common share - diluted	$ 0.09	$ 0.04
Weighted average number of common shares outstanding - basic	328,789	318,009
Weighted average number of common shares outstanding - diluted	329,421	319,680