CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL (UNITED DOMINION REALTY, L.P.) (Unaudited). - United Dominion Realty L.P. - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Beginning Balance	$ 1,329,402	$ 1,456,786	$ 1,365,886	$ 1,485,889
Net income/(loss)	19,861	27,810	44,501	52,144
Distributions	(66,635)	(63,060)	(133,293)	(126,529)
Long Term Incentive Plan Unit grants	3,130	5,385	8,664	15,417
Unrealized gain/(loss) on derivative financial investments	(43)		(43)
Net contributions/(distributions) to/(from) noncontrolling interests	(1,258)	2,817	(1,258)	2,817
Ending Balance	1,284,457	1,429,738	1,284,457	1,429,738
Accumulated Other Comprehensive Income/(Loss), net
Unrealized gain/(loss) on derivative financial investments	(43)		(43)
Ending Balance	(43)		(43)
Total Partner's Capital
Beginning Balance	1,311,475	1,442,579	1,348,481	1,472,070
Net income/(loss)	19,373	27,394	43,491	51,340
Distributions	(66,635)	(63,060)	(133,293)	(126,529)
Long Term Incentive Plan Unit grants	3,130	5,385	8,664	15,417
Unrealized gain/(loss) on derivative financial investments	(43)		(43)
Ending Balance	1,267,300	1,412,298	1,267,300	1,412,298
Noncontrolling Interests
Beginning Balance	17,927	14,207	17,405	13,819
Net income/(loss)	488	416	1,010	804
Net contributions/(distributions) to/(from) noncontrolling interests	(1,258)	2,817	(1,258)	2,817
Ending Balance	17,157	17,440	17,157	17,440
Class A Limited Partner
Beginning Balance	64,006	79,631	81,803	69,401
Net income/(loss)	184	260	413	488
Distributions	(631)	(599)	(1,262)	(1,198)
Adjustment to reflect limited partners' capital at redemption value	1,918	(659)	(15,477)	9,942
Ending Balance	65,477	78,633	65,477	78,633
Limited Partners and LTIP Units
Beginning Balance	250,877	283,862	284,580	302,545
Net income/(loss)	719	908	1,615	1,720
Distributions	(2,565)	(2,109)	(5,153)	(4,679)
OP Unit redemptions for common shares of UDR	(110)	(6,949)	(110)	(78,622)
Adjustment to reflect limited partners' capital at redemption value	4,485	(7,187)	(33,060)	37,529
Long Term Incentive Plan Unit grants	3,130	5,385	8,664	15,417
Ending Balance	256,536	273,910	256,536	273,910
Limited Partner
Beginning Balance	995,759	1,078,160	981,239	1,099,174
Net income/(loss)	18,458	26,209	41,437	49,101
Distributions	(63,399)	(60,314)	(126,798)	(120,576)
OP Unit redemptions for common shares of UDR	110	6,949	110	78,622
Adjustment to reflect limited partners' capital at redemption value	(6,403)	7,846	48,537	(47,471)
Ending Balance	944,525	1,058,850	944,525	1,058,850
General Partner
Beginning Balance	833	926	859	950
Net income/(loss)	12	17	26	31
Distributions	(40)	(38)	(80)	(76)
Ending Balance	$ 805	$ 905	$ 805	$ 905