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Consolidated Statements of Comprehensive Income / (Loss) (UNITED DOMINION REALTY, L.P.) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income/(loss)	$ 89,884	$ 31,086	$ 166,301	$ 50,098
Other comprehensive income/(loss), including portion attributable to noncontrolling interests:
Unrealized holding gain/(loss)	6,186	304	(1,366)	249
Other comprehensive income/(loss), including portion attributable to noncontrolling interests	6,478	1,449	(337)	2,926
Comprehensive income/(loss)	96,362	32,535	165,964	53,024
Comprehensive (income)/loss attributable to noncontrolling interests	(3,253)	(1,129)	(5,623)	(1,836)
Comprehensive income/(loss) attributable to OP unitholders	93,109	31,406	160,341	51,188
United Dominion Reality L.P. [Member]
Net income/(loss)	47,730	24,604	84,470	55,417
Other comprehensive income/(loss), including portion attributable to noncontrolling interests:
Unrealized holding gain/(loss)	(26)	(140)	(77)	(191)
(Gain)/loss reclassifed into earnings from other comprehensive income/(loss)	267	573	553	1,196
Other comprehensive income/(loss), including portion attributable to noncontrolling interests	241	433	476	1,005
Comprehensive income/(loss)	47,971	25,037	84,946	56,422
Comprehensive (income)/loss attributable to noncontrolling interests	(347)	(178)	(741)	(458)
Comprehensive income/(loss) attributable to OP unitholders	$ 47,624	$ 24,859	$ 84,205	$ 55,964

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