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Consolidation and Basis of Presentation (Details)	Jun. 30, 2012	Dec. 31, 2011
Consolidation And Basis Of Presentation (Textual) [Abstract]
Operating Partnership outstanding units	184,281,253
OP units outstanding related to general partner	174,865,430	174,749,068
Percentage of units owned by UDR	94.90%	94.90%
OP units outstanding related to limited partner		9,421,302
Percentage of units outstanding in Heritage OP		5.10%

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General Partners Capital Account Units Owned Percentage.

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