CONSOLIDATED BALANCE SHEETS (UNITED DOMINION REALTY, L.P.) (Parenthetical) - shares	Jun. 30, 2019	Dec. 31, 2018
Partners' capital:
Operating Partnership units outstanding related to limited partner	184,063,542	183,636,543
United Dominion Reality 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