COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	Jun. 30, 2024 USD ($) community
Real estate properties
Number of communities \| community	169
Costs Incurred to Date	$ 105,418
UDR's Remaining Commitment	147,622
Real estate technology investments
Real estate properties
Costs Incurred to Date	58,029
UDR's Remaining Commitment	$ 47,971
Wholly owned - redevelopment
Real estate properties
Number of communities \| community	9
Costs Incurred to Date	$ 47,389
UDR's Remaining Commitment	$ 99,651

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant