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Consolidated Statements of Changes in Capital (UNITED DOMINION REALTY, L.P) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Other comprehensive income (loss)	$ 1,492	$ 4,420
United Dominion Reality L.P. [Member]
Balance, December 31, 2013		1,803,097
Net income/(loss)		64,293
Distributions		(143,362)
Adjustment to reflect limited partners' capital at redemption value	0
Other comprehensive income (loss)	585	1,590
Net change in amount due to/(from) General Partner		10,711
Partners' Capital Account, Exchanges and Conversions	0
Balance, June 30, 2014	1,736,329	1,736,329
Payable/(Receivable) due to/(from) General Partner [Member] [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		(9,916)
Net change in amount due to/(from) General Partner		10,711
Balance, June 30, 2014	795	795
Accumulated Other Comprehensive Income (Loss) [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		(3,065)
Other comprehensive income (loss)		1,590
Balance, June 30, 2014	(1,475)	(1,475)
Total Partner's Capital [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		1,795,934
Net income/(loss)		63,596
Distributions		(143,362)
Adjustment to reflect limited partners' capital at redemption value	0
Other comprehensive income (loss)		1,590
Balance, June 30, 2014	1,717,758	1,717,758
Noncontrolling Interests [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		17,079
Net income/(loss)		697
Balance, June 30, 2014	17,776	17,776
Partnership Capital [Member] | United Dominion Reality L.P. [Member]
Partners' Capital Account, Exchanges and Conversions	0
Class A Limited Partner [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		40,902
Net income/(loss)		608
Distributions		(1,746)
Adjustment to reflect limited partners' capital at redemption value		7,969
Balance, June 30, 2014	47,733	47,733
Limited Partners [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		176,695
Net income/(loss)		2,618
Distributions		(5,861)
Adjustment to reflect limited partners' capital at redemption value		32,946
Partners' Capital Account, Exchanges and Conversions		(4,317)
Balance, June 30, 2014	202,081	202,081
Limited Partner [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		1,580,239
Net income/(loss)		60,332
Distributions		(135,668)
Adjustment to reflect limited partners' capital at redemption value		(40,915)
Partners' Capital Account, Exchanges and Conversions		4,317
Balance, June 30, 2014	1,468,305	1,468,305
General Partner [Member] | United Dominion Reality L.P. [Member]
Balance, December 31, 2013		1,163
Net income/(loss)		38
Distributions		(87)
Balance, June 30, 2014	$ 1,114	$ 1,114

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Net change in amount due to/(from) General Partner.

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The consolidated profit or loss for the period including the portion attributable to the noncontrolling interest.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners.

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Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

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