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CAPITAL STRUCTURE (UNITED DOMINION REALTY, L.P.) - Units Rollforward (Details) - shares shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Capital structure |  |  |
Balance | 183,637 | 183,351 | 183,279
Vesting of LTIP Units | 427 | 286 | 72
Balance | 184,064 | 183,637 | 183,351
UDR, Inc. |  |  |
Capital structure |  |  |
Balance | 174,100 |  |
Balance | 176,100 | 174,100 |
Non-affiliated Partners |  |  |
Capital structure |  |  |
Balance | 7,900 |  |
Class A Limited Partner | UDR, Inc. |  |  |
Capital structure |  |  |
Balance | 121 | 121 | 121
Balance | 121 | 121 | 121
Non-affiliated Partners | Class A Limited Partner |  |  |
Capital structure |  |  |
Balance | 1,752 | 1,752 | 1,752
Balance | 1,752 | 1,752 | 1,752
Limited Partner |  |  |
Capital structure |  |  |
Balance | 7,636 | 7,361 | 7,297
Vesting of LTIP Units | 427 | 286 | 72
OP redemptions for UDR stock | (1,969) | (11) | (8)
Balance | 6,094 | 7,636 | 7,361
Limited Partner | UDR, Inc. |  |  |
Capital structure |  |  |
Balance | 174,017 | 174,006 | 173,998
OP redemptions for UDR stock | 1,969 | 11 | 8
Balance | 175,986 | 174,017 | 174,006
General Partner | UDR, Inc. |  |  |
Capital structure |  |  |
Balance | 111 | 111 | 111
Balance | 111 | 111 | 111

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