Consolidated Balance Sheets (UNITED DOMINION REALTY, L.P) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Real estate owned:
Real estate held for investment	$ 7,988,133	$ 6,398,630
Less: accumulated depreciation	(1,794,150)	(1,550,847)
Real estate held for investment, net	6,193,983	4,847,783
Real estate sold or held for sale (net of accumulated depreciation of $0 and $48,191)	36,366	297,326
Total real estate owned, net of accumulated depreciation	6,423,164	5,243,021
Cash and cash equivalents	13,482	9,486
Restricted cash	19,641	15,447
Deferred financing costs, net	23,709	27,267
Other assets	129,931	74,596
Total assets	6,804,903	5,529,540
LIABILITIES AND CAPITAL
Secured debt	2,004,525	1,840,872
Secured debt - real estate held for sale	17,159	122,798
Real estate taxes payable	28,729	14,585
Accrued interest payable	23,924	20,889
Security deposits and prepaid rent	37,685	26,046
Distributions payable	47,489	36,561
Deferred fees and gains on the sale of depreciable property	29,106	28,943
Accounts payable, accrued expenses, and other liabilities	109,066	105,925
Total liabilities	4,265,344	3,800,453
Partners' Capital:
Accumulated other comprehensive loss	(15,427)	(3,469)
Total capital		1,561,623
Total liabilities and equity	6,804,903	5,529,540
United Dominion Reality L.P [Member]
Real estate owned:
Real estate held for investment	4,322,461	3,516,918
Less: accumulated depreciation	(965,980)	(835,892)
Real estate held for investment, net	3,356,481	2,681,026
Real estate sold or held for sale (net of accumulated depreciation of $0 and $48,191)	0	141,075
Total real estate owned, net of accumulated depreciation	3,356,481	2,822,101
Cash and cash equivalents	4,080	920
Restricted cash	10,782	8,022
Deferred financing costs, net	9,000	7,465
Other assets	45,894	22,887
Total assets	3,426,237	2,861,395
LIABILITIES AND CAPITAL
Secured debt	1,260,891	1,014,459
Secured debt - real estate held for sale	0	55,602
Notes payable due to General Partner	83,771	78,271
Real estate taxes payable	12,943	5,245
Accrued interest payable	878	518
Security deposits and prepaid rent	18,735	13,158
Distributions payable	37,104	33,559
Deferred fees and gains on the sale of depreciable property	63,838	63,838
Accounts payable, accrued expenses, and other liabilities	37,754	35,122
Total liabilities	1,515,914	1,299,772
Partners' Capital:
Operating partnership units:184,281,254 OP units outstanding at September 30, 2011 and 179,909,408 at December 31, 2010
General partner: 110,883 OP units outstanding at September 30, 2011 and December 31, 2010	1,298	1,363
Limited partners: 184,170,371 OP units outstanding at September 30, 2011 and 179,798,525 OP units outstanding at December 31, 2010	2,048,887	2,046,380
Accumulated other comprehensive loss	(7,541)	(5,502)
Total partners' capital	2,042,644	2,042,241
Receivable due from General Partner	(144,503)	(492,709)
Non-controlling interest	12,182	12,091
Total capital	1,910,323	1,561,623
Total liabilities and equity	$ 3,426,237	$ 2,861,395