XML 107 R115.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

COMMITMENTS AND CONTINGENCIES (UNITED DOMINION REALTY, L.P.) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Loss Contingencies [Line Items] |
Summary of real estate commitments | The following summarizes the Company’s real estate commitments at December 31, 2019 (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number | ​ | UDR's | ​ | UDR's Remaining | ​
​ | ​ | Properties | ​ | Investment (a) | ​ | Commitment | ​
Wholly-owned — under development |  | 3 | ​ | $ | 69,754 | ​ | $ | 208,723 |
Wholly-owned — redevelopment |  | 2 | ​ | ​ | 15,744 | ​ | ​ | 19,756 |
Joint ventures: |  |  | ​ |  |  | ​ |  |  |
Preferred equity investments |  | 2 | ​ | ​ | 73,868 | (b) | ​ | 9,121 | (c)
Other investments | ​ | - | ​ | ​ | 13,598 | ​ | ​ | 8,100 | (d)
Total |  |  | ​ | $ | 172,964 | ​ | $ | 245,700 |
(a) | Represents UDR’s investment as of December 31, 2019.
(b) | Represents UDR’s investment in 1300 Fairmount and Modera Lake Merritt, which were under development as of December 31, 2019.
(c) | Represents UDR’s remaining commitment for 1300 Fairmount and Modera Lake Merritt.
(d) | Represents UDR’s remaining commitment for other investment ventures.
​
United Dominion Realty L.P. |
Loss Contingencies [Line Items] |
Summary of real estate commitments | The following summarizes the Operating Partnership’s real estate commitments at December 31, 2019 (dollars in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number | ​ | ​ | ​ | Operating Partnership's
​ | ​ | Properties | ​ | Investment | ​ | Remaining Commitment
Real estate communities - redevelopment |  | 1 | ​ | $ | 8,073 | ​ | $ | 16,927

X
- Definition Tabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=udr_UnitedDominionRealityLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |