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Earnings Per Share | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Earnings Per Share And Earnings Per Unit [Text Block] | 10. Earning Per Share and Earnings Per Unit Equity Residential The following tables set forth the computation of net income per share – basic and net income per share – diluted for the Company (amounts in thousands except per share amounts):
|  | Six Months Ended June 30, |  | Quarter Ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Numerator for net income per share – basic: |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 488,573 |  |  | $ | 198,890 |  |  | $ | 298,504 |  |  | $ | 117,210 |
Allocation to Noncontrolling Interests – Operating Partnership, net |  | (18,403 | ) |  | (7,475 | ) |  | (11,350 | ) |  | (4,422 | )
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties |  | (1,487 | ) |  | (1,092 | ) |  | (844 | ) |  | (588 | )
Preferred distributions |  | (1,724 | ) |  | (2,072 | ) |  | (833 | ) |  | (1,036 | )
Premium on redemption of Preferred Shares |  | (2,789 | ) |  | — |  |  | — |  |  | — |
Income from continuing operations available to Common Shares, net of Noncontrolling Interests |  | 464,170 |  |  | 188,251 |  |  | 285,477 |  |  | 111,164 |
Discontinued operations, net of Noncontrolling Interests |  | 259 |  |  | 1,502 |  |  | 110 |  |  | 490 |
Numerator for net income per share – basic |  | $ | 464,429 |  |  | $ | 189,753 |  |  | $ | 285,587 |  |  | $ | 111,654 |
Numerator for net income per share – diluted: |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 488,573 |  |  | $ | 198,890 |  |  | $ | 298,504 |  |  | $ | 117,210 |
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties |  | (1,487 | ) |  | (1,092 | ) |  | (844 | ) |  | (588 | )
Preferred distributions |  | (1,724 | ) |  | (2,072 | ) |  | (833 | ) |  | (1,036 | )
Premium on redemption of Preferred Shares |  | (2,789 | ) |  | — |  |  | — |  |  | — |
Income from continuing operations available to Common Shares |  | 482,573 |  |  | 195,726 |  |  | 296,827 |  |  | 115,586 |
Discontinued operations, net |  | 269 |  |  | 1,562 |  |  | 114 |  |  | 510 |
Numerator for net income per share – diluted |  | $ | 482,842 |  |  | $ | 197,288 |  |  | $ | 296,941 |  |  | $ | 116,096 |
Denominator for net income per share – basic and diluted: |  |  |  |  |  |  |  |
Denominator for net income per share – basic |  | 363,288 |  |  | 360,641 |  |  | 363,476 |  |  | 360,809 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
OP Units |  | 13,592 |  |  | 13,736 |  |  | 13,587 |  |  | 13,742 |
Long-term compensation shares/units |  | 3,466 |  |  | 2,403 |  |  | 3,428 |  |  | 2,567 |
Denominator for net income per share – diluted |  | 380,346 |  |  | 376,780 |  |  | 380,491 |  |  | 377,118 |
Net income per share – basic |  | $ | 1.28 |  |  | $ | 0.53 |  |  | $ | 0.79 |  |  | $ | 0.31 |
Net income per share – diluted |  | $ | 1.27 |  |  | $ | 0.52 |  |  | $ | 0.78 |  |  | $ | 0.31 |
Net income per share – basic: |  |  |  |  |  |  |  |
Income from continuing operations available to Common Shares, net of Noncontrolling Interests |  | $ | 1.28 |  |  | $ | 0.52 |  |  | $ | 0.79 |  |  | $ | 0.31 |
Discontinued operations, net of Noncontrolling Interests |  | — |  |  | 0.01 |  |  | — |  |  | — |
Net income per share – basic |  | $ | 1.28 |  |  | $ | 0.53 |  |  | $ | 0.79 |  |  | $ | 0.31 |
Net income per share – diluted: |  |  |  |  |  |  |  |
Income from continuing operations available to Common Shares |  | $ | 1.27 |  |  | $ | 0.52 |  |  | $ | 0.78 |  |  | $ | 0.31 |
Discontinued operations, net |  | — |  |  | — |  |  | — |  |  | — |
Net income per share – diluted |  | $ | 1.27 |  |  | $ | 0.52 |  |  | $ | 0.78 |  |  | $ | 0.31 |
ERP Operating Limited Partnership The following tables set forth the computation of net income per Unit – basic and net income per Unit – diluted for the Operating Partnership (amounts in thousands except per Unit amounts):
|  | Six Months Ended June 30, |  | Quarter Ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Numerator for net income per Unit – basic and diluted: |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 488,573 |  |  | $ | 198,890 |  |  | $ | 298,504 |  |  | $ | 117,210 |
Net (income) attributable to Noncontrolling Interests – Partially Owned Properties |  | (1,487 | ) |  | (1,092 | ) |  | (844 | ) |  | (588 | )
Allocation to Preference Units |  | (1,724 | ) |  | (2,072 | ) |  | (833 | ) |  | (1,036 | )
Allocation to premium on redemption of Preference Units |  | (2,789 | ) |  | — |  |  | — |  |  | — |
Income from continuing operations available to Units |  | 482,573 |  |  | 195,726 |  |  | 296,827 |  |  | 115,586 |
Discontinued operations, net |  | 269 |  |  | 1,562 |  |  | 114 |  |  | 510 |
Numerator for net income per Unit – basic and diluted |  | $ | 482,842 |  |  | $ | 197,288 |  |  | $ | 296,941 |  |  | $ | 116,096 |
Denominator for net income per Unit – basic and diluted: |  |  |  |  |  |  |  |
Denominator for net income per Unit – basic |  | 376,880 |  |  | 374,377 |  |  | 377,063 |  |  | 374,551 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Dilution for Units issuable upon assumed exercise/vesting of the Company’s long-term compensation shares/units |  | 3,466 |  |  | 2,403 |  |  | 3,428 |  |  | 2,567 |
Denominator for net income per Unit – diluted |  | 380,346 |  |  | 376,780 |  |  | 380,491 |  |  | 377,118 |
Net income per Unit – basic |  | $ | 1.28 |  |  | $ | 0.53 |  |  | $ | 0.79 |  |  | $ | 0.31 |
Net income per Unit – diluted |  | $ | 1.27 |  |  | $ | 0.52 |  |  | $ | 0.78 |  |  | $ | 0.31 |
Net income per Unit – basic: |  |  |  |  |  |  |  |
Income from continuing operations available to Units |  | $ | 1.28 |  |  | $ | 0.52 |  |  | $ | 0.79 |  |  | $ | 0.31 |
Discontinued operations, net |  | — |  |  | 0.01 |  |  | — |  |  | — |
Net income per Unit – basic |  | $ | 1.28 |  |  | $ | 0.53 |  |  | $ | 0.79 |  |  | $ | 0.31 |
Net income per Unit – diluted: |  |  |  |  |  |  |  |
Income from continuing operations available to Units |  | $ | 1.27 |  |  | $ | 0.52 |  |  | $ | 0.78 |  |  | $ | 0.31 |
Discontinued operations, net |  | — |  |  | — |  |  | — |  |  | — |
Net income per Unit – diluted |  | $ | 1.27 |  |  | $ | 0.52 |  |  | $ | 0.78 |  |  | $ | 0.31 |

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