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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, 2019
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, 2019 |  | Three Months Ended June 30, 2018
| 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 | $ | 92,275 |  |  | 65,718,806 |  |  | $ | 1.40 |  |  | $ | 100,440 |  |  | 66,047,751 |  |  | $ | 1.52 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 103,009 |  |  |  |  | — |  |  | 48,598 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 92,275 |  |  | 65,821,815 |  |  | $ | 1.40 |  |  | $ | 100,440 |  |  | 66,096,349 |  |  | $ | 1.52 |
| Six Months Ended June 30, 2019 |  | Six Months Ended June 30, 2018
| 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 | $ | 211,133 |  |  | 65,710,842 |  |  | $ | 3.21 |  |  | $ | 191,358 |  |  | 66,045,897 |  |  | $ | 2.90 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 91,575 |  |  |  |  | — |  |  | 42,906 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders | $ | 211,133 |  |  | 65,802,417 |  |  | $ | 3.21 |  |  | $ | 191,358 |  |  | 66,088,803 |  |  | $ | 2.90 |
Essex Portfolio, L.P. [Member] |
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, 2019 |  | Three Months Ended June 30, 2018
| 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 | $ | 95,503 |  |  | 68,018,090 |  |  | $ | 1.40 |  |  | $ | 103,900 |  |  | 68,320,849 |  |  | $ | 1.52 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 103,009 |  |  |  |  | — |  |  | 48,598 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common unitholders | $ | 95,503 |  |  | 68,121,099 |  |  | $ | 1.40 |  |  | $ | 103,900 |  |  | 68,369,447 |  |  | $ | 1.52 |
| Six Months Ended June 30, 2019 |  | Six Months Ended June 30, 2018
| 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 | $ | 218,532 |  |  | 68,012,999 |  |  | $ | 3.21 |  |  | $ | 197,950 |  |  | 68,319,151 |  |  | $ | 2.90 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |
Stock options | — |  |  | 91,575 |  |  |  |  | — |  |  | 42,906 |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common unitholders | $ | 218,532 |  |  | 68,104,574 |  |  | $ | 3.21 |  |  | $ | 197,950 |  |  | 68,362,057 |  |  | $ | 2.90 |

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