CONSOLIDATED BALANCE SHEETS (UNITED DOMINION REALTY, L.P.) (Parenthetical) - shares	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Partners' capital:
Operating Partnership units outstanding related to limited partner	184,064,000	183,637,000	183,351,000	183,279,000
United Dominion Realty L.P.
Partners' capital:
OP units outstanding related to general partner	110,883	110,883
Operating Partnership units outstanding related to limited partner	183,952,659	183,525,660