Consolidated Balance Sheets (UNITED DOMINION REALTY, L.P) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Real estate owned:
Real estate held for investment	$ 7,729,300	$ 7,564,780
Less: accumulated depreciation	(2,006,349)	(1,923,429)
Real estate held for investment, net	5,722,951	5,641,351
Real estate under development (net of accumulated depreciation)	451,683	489,795
Total real estate owned, net of accumulated depreciation	6,174,634	6,131,146
Cash and cash equivalents	7,121	12,115
Restricted cash	24,628	23,561
Deferred financing costs, net	23,654	24,990
Other assets	133,154	125,654
Total assets	6,890,781	6,859,103
LIABILITIES AND CAPITAL
Secured debt	1,425,663	1,430,135
Real estate taxes payable	11,132	14,076
Accrued interest payable	29,404	30,937
Security deposits and prepaid rent	48,448	42,589
Distributions payable	61,907	57,915
Deferred fees and gains on the sale of depreciable property	(29,379)
Accounts payable, accrued expenses, and other liabilities	83,060	87,003
Total liabilities	3,733,058	3,641,853
Partners' Capital:
Accumulated other comprehensive loss	(9,499)	(11,257)
Total liabilities and equity	6,890,781	6,859,103
United Dominion Reality L.P. [Member]
Real estate owned:
Real estate held for investment	4,111,598	4,095,528
Less: accumulated depreciation	(1,141,308)	(1,096,001)
Real estate held for investment, net	2,970,290	2,999,527
Real estate under development (net of accumulated depreciation)	97,750	86,260
Total real estate owned, net of accumulated depreciation	3,068,040	3,085,787
Cash and cash equivalents	2,951	2,804
Restricted cash	13,389	12,926
Deferred financing costs, net	5,745	6,072
Other assets	35,947	28,665
Total assets	3,126,072	3,136,254
LIABILITIES AND CAPITAL
Secured debt	964,989	967,239
Notes payable due to General Partner	88,696	88,696
Real estate taxes payable	4,370	5,783
Accrued interest payable	3,676	3,604
Security deposits and prepaid rent	20,550	18,190
Distributions payable	43,488	40,752
Deferred fees and gains on the sale of depreciable property	63,838	63,838
Accounts payable, accrued expenses, and other liabilities	26,296	29,396
Total liabilities	1,215,903	1,217,498
Partners' Capital:
General partner: 110,883 OP units outstanding at September 30, 2012 and December 31, 2011	1,202	1,223
Limited partners: 184,170,370 OP units outstanding at September 30, 2012 and December 31, 2011	1,885,707	1,921,445
Accumulated other comprehensive loss	(4,554)	(5,369)
Total partners' capital	1,882,355	1,917,299
Receivable due from General Partner	15,256	(11,056)
Non-controlling interest	12,558	12,513
Total capital	1,910,169	1,918,756
Total liabilities and equity	$ 3,126,072	$ 3,136,254

This element includes: 1) Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business; 2) Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities; 3) Carrying amount as of the balance sheet date of liabilities not otherwise specified in the taxonomy. Also serves as the sum of liabilities not individually reported in the financial statements, or not separately disclosed in notes.

No definition available.