Consolidated Statements of Operations (UNITED DOMINION REALTY, L.P) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES
Rental income	$ 691,263	$ 574,084	$ 547,820
Non-property income:
Other income	17,422	12,502	14,274
Total revenues	708,685	586,586	562,094
Rental expenses:
Real estate taxes and insurance	84,007	70,762	67,533
Personnel	56,617	51,696	47,121
Utilities	37,405	31,564	29,153
Repair and maintenance	37,155	32,386	29,095
Administrative and marketing	15,411	14,643	12,920
Property management	19,009	15,788	15,066
Other operating expenses	5,990	5,773	6,473
Real estate depreciation and amortization	356,011	275,615	252,952
Interest expenses:
Interest on secured debt	151,144	140,869	135,317
General and administrative	45,915	45,243	39,035
Total expenses	819,616	700,719	640,598
Loss from continuing operations	(111,636)	(115,804)	(97,480)
Income from discontinued operations	132,221	9,216	5,857
Consolidated net income/(loss)	20,585	(106,588)	(91,623)
Net income/(loss) attributable to UDR, Inc.	20,023	(102,899)	(87,532)
United Dominion Realty L.P
REVENUES
Rental income	367,245	319,089	322,456
Non-property income:
Other income			5,695
Total revenues	367,245	319,089	328,151
Rental expenses:
Real estate taxes and insurance	41,233	39,389	39,436
Personnel	28,240	26,239	25,288
Utilities	19,540	16,676	16,034
Repair and maintenance	18,220	16,762	15,908
Administrative and marketing	7,521	6,737	6,906
Property management	10,099	8,775	8,868
Other operating expenses	5,317	4,949	4,868
Real estate depreciation and amortization	191,926	152,789	152,807
Interest expenses:
Interest on secured debt	51,827	48,716	43,282
Interest on note payable due to General Partner	990	424	5,028
General and administrative	26,370	23,291	16,886
Total expenses	401,283	344,747	335,311
Loss from continuing operations	(34,038)	(25,658)	(7,160)
Income from discontinued operations	64,267	4,964	3,115
Consolidated net income/(loss)	30,229	(20,694)	(4,045)
Net income attributable to non-controlling interests	(70)	(41)	(131)
Net income/(loss) attributable to UDR, Inc.	$ 30,159	$ (20,735)	$ (4,176)
Earnings per OP unit- basic and diluted:
Loss from continuing operations attributable to OP unitholders	$ (0.19)	$ (0.14)	$ (0.04)
Income from discontinued operations	$ 0.35	$ 0.03	$ 0.02
Income/(loss) attributable to OP unitholders	$ 0.17	$ (0.12)	$ (0.02)
Weighted average OP units outstanding	182,448	179,909	178,817