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UNAUDITED SUMMARIZED CONSOLIDATED QUARTERLY FINANCIAL DATA (UNITED DOMINION REALTY, L.P.) (Tables) | 12 Months Ended
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Dec. 31, 2019
Entity information |
Schedule of quarterly financial information | Selected consolidated quarterly financial data for the years ended December 31, 2019 and 2018 is summarized in the table below (dollars in thousands, except per share amounts):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31, | ​ | June 30, | ​ | September 30, | ​ | December 31,
2019 |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Rental income | ​ | $ | 267,922 | ​ | $ | 278,463 | ​ | $ | 289,008 | ​ | $ | 302,745
Net income/(loss) | ​ |  | 26,602 | ​ |  | 38,318 | ​ |  | 29,422 | ​ |  | 105,237
Net income/(loss) attributable to common stockholders (a) | ​ |  | 23,492 | ​ |  | 34,588 | ​ |  | 26,173 | ​ |  | 96,928
Income/(loss) attributable to common stockholders per weighted average common share (a): | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Basic | ​ | $ | 0.08 | ​ | $ | 0.12 | ​ | $ | 0.09 | ​ | $ | 0.33
Diluted | ​ | $ | 0.08 | ​ | $ | 0.12 | ​ | $ | 0.09 | ​ | $ | 0.33
Weighted average number of common shares outstanding: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Basic | ​ |  | 277,002 | ​ |  | 281,960 | ​ |  | 288,706 | ​ |  | 293,107
Diluted | ​ |  | 277,557 | ​ |  | 282,575 | ​ |  | 289,529 | ​ |  | 294,073
2018 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Rental income | ​ | $ | 250,483 | ​ | $ | 256,634 | ​ | $ | 263,256 | ​ | $ | 264,732
Net income/(loss) | ​ |  | 89,225 | ​ |  | 22,444 | ​ |  | 20,258 | ​ |  | 89,615
Net income/(loss) attributable to common stockholders (a) | ​ |  | 80,801 | ​ |  | 19,630 | ​ |  | 17,639 | ​ |  | 81,168
Income/(loss) attributable to common stockholders per weighted average common share (a): | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Basic | ​ | $ | 0.30 | ​ | $ | 0.07 | ​ | $ | 0.07 | ​ | $ | 0.30
Diluted | ​ | $ | 0.30 | ​ | $ | 0.07 | ​ | $ | 0.07 | ​ | $ | 0.30
Weighted average number of common shares outstanding: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Basic | ​ |  | 267,546 | ​ |  | 267,311 | ​ |  | 267,727 | ​ |  | 270,107
Diluted | ​ |  | 269,208 | ​ |  | 268,890 | ​ |  | 268,861 | ​ |  | 270,755
| (a) | Due to the quarterly pro-rata calculation of noncontrolling interest and rounding, the sum of the quarterly per share and/or dollar amounts may not equal the annual totals.
United Dominion Realty L.P. |
Entity information |
Schedule of quarterly financial information | Selected consolidated quarterly financial data for the years ended December 31, 2019 and 2018 is summarized in the table below (dollars in thousands, except per unit amounts):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ |  | March 31, |  | June 30, |  | September 30, |  | December 31,
2019 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Rental income | ​ | $ | 108,334 | ​ | $ | 110,350 | ​ | $ | 111,700 | ​ | $ | 111,389
Income/(loss) | ​ |  | 24,334 | ​ |  | 27,810 | ​ |  | 27,283 | ​ |  | 24,568
Income/(loss) attributable to OP unitholders | ​ |  | 23,946 | ​ |  | 27,394 | ​ |  | 26,835 | ​ |  | 23,988
Income/(loss) attributable to OP unitholders per weighted average OP Unit — basic and diluted (a) | ​ | $ | 0.13 | ​ | $ | 0.15 | ​ | $ | 0.15 | ​ | $ | 0.13
2018 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Rental income | ​ | $ | 106,592 | ​ | $ | 107,266 | ​ | $ | 109,539 | ​ | $ | 108,523
Income/(loss) | ​ |  | 91,845 | ​ |  | 25,181 | ​ |  | 28,135 | ​ |  | 86,324
Income/(loss) attributable to OP unitholders | ​ |  | 91,427 | ​ |  | 24,761 | ​ |  | 27,695 | ​ |  | 85,880
Income/(loss) attributable to OP unitholders per weighted average OP Unit — basic and diluted (a) | ​ | $ | 0.50 | ​ | $ | 0.13 | ​ | $ | 0.15 | ​ | $ | 0.47
(a) | Quarterly net income/(loss) per weighted average OP Unit amounts may not total to the annual amounts.

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