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Net Income Per Common Share and Net Income Per Common Unit (Tables) | 6 Months Ended
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Jun. 30, 2021
Net Income Per Share and Net Income Per Unit [Line Items] |
Schedule of Net Income Per Common Share | Essex Property Trust, Inc.
| Three Months Ended June 30, 2021 |  | Three Months Ended June 30, 2020
| Income |  | Weighted- average Common Shares |  | Per Common Share Amount |  | Income |  | Weighted- average Common Shares |  | Per Common Share Amount
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 64,846 |  |  | 65,001,677 |  |  | $ | 1.00 |  |  | $ | 84,458 |  |  | 65,412,407 |  |  | $ | 1.29 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 79,069 |  |  |  |  | — |  |  | 15,528 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 64,846 |  |  | 65,080,746 |  |  | $ | 1.00 |  |  | $ | 84,458 |  |  | 65,427,935 |  |  | $ | 1.29 |
| Six Months Ended June 30, 2021 |  | Six Months Ended June 30, 2020
| Income |  | Weighted- average Common Shares |  | Per Common Share Amount |  | Income |  | Weighted- average Common Shares |  | Per Common Share Amount
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 233,290 |  |  | 64,995,682 |  |  | $ | 3.59 |  |  | $ | 399,464 |  |  | 65,728,119 |  |  | $ | 6.08 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 52,334 |  |  |  |  | — |  |  | 32,981 |  |  |
DownREIT units | — |  |  | — |  |  |  |  | 392 |  |  | 94,247 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 233,290 |  |  | 65,048,016 |  |  | $ | 3.59 |  |  | $ | 399,856 |  |  | 65,855,347 |  |  | $ | 6.07 |
Essex Portfolio, L.P. |
Net Income Per Share and Net Income Per Unit [Line Items] |
Schedule of Net Income Per Common Share | Essex Portfolio, L.P.
| Three Months Ended June 30, 2021 |  | Three Months Ended June 30, 2020
| Income |  | Weighted- average Common Units |  | Per Common Unit Amount |  | Income |  | Weighted- average Common Units |  | Per Common Unit Amount
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income available to common unitholders | $ | 67,134 |  |  | 67,295,437 |  |  | $ | 1.00 |  |  | $ | 87,422 |  |  | 67,708,157 |  |  | $ | 1.29 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 79,069 |  |  |  |  | — |  |  | 15,528 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income available to common unitholders | $ | 67,134 |  |  | 67,374,506 |  |  | $ | 1.00 |  |  | $ | 87,422 |  |  | 67,723,685 |  |  | $ | 1.29 |
| Six Months Ended June 30, 2021 |  | Six Months Ended June 30, 2020
| Income |  | Weighted- average Common Units |  | Per Common Unit Amount |  | Income |  | Weighted- average Common Units |  | Per Common Unit Amount
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income available to common unitholders | $ | 241,525 |  |  | 67,289,464 |  |  | $ | 3.59 |  |  | $ | 413,414 |  |  | 68,026,084 |  |  | $ | 6.08 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 52,334 |  |  |  |  | — |  |  | 32,981 |  |  |
DownREIT units | — |  |  | — |  |  |  |  | 392 |  |  | 94,247 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income available to common unitholders | $ | 241,525 |  |  | 67,341,798 |  |  | $ | 3.59 |  |  | $ | 413,806 |  |  | 68,153,312 |  |  | $ | 6.07 |

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