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CAPITAL STRUCTURE (UNITED DOMINION REALTY, L.P.) - Ownership Interests (Details) $ / shares in Units, $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) class $ / shares shares | Dec. 31, 2019 USD ($) shares
Capital structure |  |
Limited partnership units owned | 184,836,000 | 184,064,000
Redeemable noncontrolling interests in the Operating Partnership | $ | $ 834,466 | $ 1,018,665
Number of classes of LTIP Units | class | 2 |
United Dominion Realty L.P. |  |
Capital structure |  |
General Partnership units outstanding | 100,000 |
Limited partnership units owned | 176.2 |
United Dominion Realty L.P. |  |
Capital structure |  |
General Partnership units outstanding | 110,883 | 110,883
Limited partnership units owned | 184,724,677 | 183,952,659
Required period to be outstanding before unit is redeemable (in years) | 1 year |
Redeemable noncontrolling interests in the Operating Partnership | $ | $ 322,000 | $ 366,400
UDR, Inc. |  |
Capital structure |  |
Limited partnership units owned | 176,100,000 | 176,100,000
Percentage of units | 95.30% | 95.70%
UDR, Inc. | United Dominion Realty L.P. |  |
Capital structure |  |
General Partnership units outstanding | 176.2 |
Percentage of units |  | 95.70%
Non-affiliated Partners |  |
Capital structure |  |
Limited partnership units owned | 8.6 |
Percentage of units | 4.70% |
Non-affiliated Partners | United Dominion Realty L.P. |  |
Capital structure |  |
Limited partnership units owned | 8.6 |
Percentage of units | 4.70% | 4.30%
Class A Limited Partner |  |
Capital structure |  |
Cumulative, annual, non-compounded preferred return on Class A Partnership units | 8.00% |
Value of Class A Partnership units (in dollars per share) | $ / shares | $ 16.61 |
Class A Limited Partner | United Dominion Realty L.P. |  |
Capital structure |  |
Limited partnership units owned | 1,900,000 | 1,900,000
Class A Limited Partner | UDR, Inc. |  |
Capital structure |  |
Limited partnership units owned | 100,000 | 100,000
Non-affiliated Partners | United Dominion Realty L.P. |  |
Capital structure |  |
Limited partnership units owned | 8,600,000 | 7,900,000
Percentage of units | 4.70% | 4.30%
Non-affiliated Partners | Class A Limited Partner |  |
Capital structure |  |
Limited partnership units owned | 1,752,000 | 1,752,000
LTIP Units One |  |
Capital structure |  |
Vesting period | 4 years |
Minimum | LTIP Units |  |
Capital structure |  |
Vesting period | 1 year |
Period of time LTIP units have been outstanding | 2 years |
Minimum | Employee Director | LTIP Units Two |  |
Capital structure |  |
Vesting period | 1 year |
Maximum | LTIP Units |  |
Capital structure |  |
Vesting period | 3 years |
Maximum | Employee Director | LTIP Units Two |  |
Capital structure |  |
Vesting period | 3 years |

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