CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL (UNITED DOMINION REALTY, L.P.) (Unaudited). - United Dominion Realty L.P. - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Beginning Balance	$ 1,365,886	$ 1,485,889
Net income/(loss)	24,640	24,334
Distributions	(66,658)	(63,469)
Long Term Incentive Plan Unit grants	5,534	10,032
Ending Balance	1,329,402	1,456,786
Total Partner's Capital
Beginning Balance	1,348,481	1,472,070
Net income/(loss)	24,118	23,946
Distributions	(66,658)	(63,469)
Long Term Incentive Plan Unit grants	5,534	10,032
Ending Balance	1,311,475	1,442,579
Noncontrolling Interests
Beginning Balance	17,405	13,819
Net income/(loss)	522	388
Ending Balance	17,927	14,207
Class A Limited Partner
Beginning Balance	81,803	69,401
Net income/(loss)	229	228
Distributions	(631)	(599)
Adjustment to reflect limited partners' capital at redemption value	(17,395)	10,601
Ending Balance	64,006	79,631
Limited Partners and LTIP Units
Beginning Balance	284,580	302,545
Net income/(loss)	896	812
Distributions	(2,588)	(2,570)
OP Unit redemptions for common shares of UDR		(71,673)
Adjustment to reflect limited partners' capital at redemption value	(37,545)	44,716
Long Term Incentive Plan Unit grants	5,534	10,032
Ending Balance	250,877	283,862
Limited Partner
Beginning Balance	981,239	1,099,174
Net income/(loss)	22,979	22,892
Distributions	(63,399)	(60,262)
OP Unit redemptions for common shares of UDR		71,673
Adjustment to reflect limited partners' capital at redemption value	54,940	(55,317)
Ending Balance	995,759	1,078,160
General Partner
Beginning Balance	859	950
Net income/(loss)	14	14
Distributions	(40)	(38)
Ending Balance	$ 833	$ 926