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CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL (UNITED DOMINION REALTY, L.P.) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Net income/(loss) | $ 105,237 | $ 26,602 | $ 89,615 | $ 89,225 | $ 199,579 | $ 221,542 | $ 132,655
Advances (to)/from General Partner |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  |  |  | 397,899 |  | 397,899 | 19,659
Conversion of Advances (to)/from the General Partner to notes payable |  |  |  |  |  | (257,204) |
Net change in advances (to)/from the General Partner |  |  |  |  |  | (140,695) | 378,240
Ending Balance |  |  |  |  |  |  | 397,899
Accumulated Other Comprehensive Income/(Loss), net |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  |  |  |  |  |  | (113)
Unrealized gain/(loss) on derivative financial investments |  |  |  |  |  |  | 113
United Dominion Realty L.P. |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | 1,485,889 |  | 1,875,130 | 1,485,889 | 1,875,130 | 1,618,499
Net income/(loss) | 24,568 | 24,334 | 86,324 | 91,845 | 103,995 | 231,485 | 107,855
Distributions |  |  |  |  | (252,818) | (237,827) | (228,090)
Long Term Incentive Plan Unit grants |  |  |  |  | 27,066 | 15,839 | 7,763
Unrealized gain/(loss) on derivative financial investments |  |  |  |  |  |  | 107
Conversion of Advances (to)/from the General Partner to notes payable |  |  |  |  |  | (257,204) |
Net change in advances (to)/from the General Partner |  |  |  |  |  | (141,534) | 368,996
Net contributions/(distributions) to/(from) noncontrolling interests |  |  |  |  | 1,754 |  |
Ending Balance | 1,365,886 |  | 1,485,889 |  | 1,365,886 | 1,485,889 | 1,875,130
United Dominion Realty L.P. | Total Partner's Capital |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | 1,472,070 |  | 1,464,295 | 1,472,070 | 1,464,295 | 1,578,202
Net income/(loss) |  |  |  |  | 102,163 | 229,763 | 106,307
Distributions |  |  |  |  | (252,818) | (237,827) | (228,090)
Long Term Incentive Plan Unit grants |  |  |  |  | 27,066 | 15,839 | 7,763
Unrealized gain/(loss) on derivative financial investments |  |  |  |  |  |  | 113
Ending Balance | 1,348,481 |  | 1,472,070 |  | 1,348,481 | 1,472,070 | 1,464,295
United Dominion Realty L.P. | Noncontrolling Interests |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | 13,819 |  | 12,936 | 13,819 | 12,936 | 20,638
Net income/(loss) |  |  |  |  | 1,832 | 1,722 | 1,548
Unrealized gain/(loss) on derivative financial investments |  |  |  |  |  |  | (6)
Net change in advances (to)/from the General Partner |  |  |  |  |  | (839) | (9,244)
Net contributions/(distributions) to/(from) noncontrolling interests |  |  |  |  | 1,754 |  |
Ending Balance | 17,405 |  | 13,819 |  | 17,405 | 13,819 | 12,936
United Dominion Realty L.P. | Class A Limited Partner |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | 69,401 |  | 67,474 | 69,401 | 67,474 | 63,901
Net income/(loss) |  |  |  |  | 971 | 2,221 | 1,015
Distributions |  |  |  |  | (2,396) | (2,328) | (2,328)
Adjustment to reflect limited partners' capital at redemption value |  |  |  |  | 13,827 | 2,034 | 4,886
Ending Balance | 81,803 |  | 69,401 |  | 81,803 | 69,401 | 67,474
United Dominion Realty L.P. | Limited Partners and LTIP Units |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | 302,545 |  | 283,568 | 302,545 | 283,568 | 269,928
Net income/(loss) |  |  |  |  | 3,404 | 9,977 | 4,270
Distributions |  |  |  |  | (9,063) | (10,718) | (9,704)
OP Unit redemptions for common shares of UDR |  |  |  |  | (79,010) | (416) | (288)
Adjustment to reflect limited partners' capital at redemption value |  |  |  |  | 39,638 | 4,295 | 11,599
Long Term Incentive Plan Unit grants |  |  |  |  | 27,066 | 15,839 | 7,763
Ending Balance | 284,580 |  | 302,545 |  | 284,580 | 302,545 | 283,568
United Dominion Realty L.P. | Limited Partner |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | 1,099,174 |  | 1,112,298 | 1,099,174 | 1,112,298 | 1,243,460
Net income/(loss) |  |  |  |  | 97,727 | 217,426 | 100,957
Distributions |  |  |  |  | (241,207) | (224,637) | (215,922)
OP Unit redemptions for common shares of UDR |  |  |  |  | 79,010 | 416 | 288
Adjustment to reflect limited partners' capital at redemption value |  |  |  |  | (53,465) | (6,329) | (16,485)
Ending Balance | 981,239 |  | 1,099,174 |  | 981,239 | 1,099,174 | 1,112,298
United Dominion Realty L.P. | General Partner |  |  |  |  |  |  |
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |  |  |  |
Beginning Balance |  | $ 950 |  | $ 955 | 950 | 955 | 1,026
Net income/(loss) |  |  |  |  | 61 | 139 | 65
Distributions |  |  |  |  | (152) | (144) | (136)
Ending Balance | $ 859 |  | $ 950 |  | $ 859 | $ 950 | $ 955

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