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Earning Per Share and Earnings Per Unit (Tables) | 12 Months Ended
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Dec. 31, 2017
Schedule of Calculation of Numerator and Denominator in Earning Per Share and Earnings Per Unit | 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):
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Numerator for net income per share – basic: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 628,381 |  |  | $ | 4,479,586 |  |  | $ | 907,621 |
Allocation to Noncontrolling Interests – Operating Partnership, net |  |  | (22,604 | ) |  |  | (171,491 | ) |  |  | (34,226 | )
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties |  |  | (2,323 | ) |  |  | (16,430 | ) |  |  | (3,657 | )
Preferred distributions |  |  | (3,091 | ) |  |  | (3,091 | ) |  |  | (3,357 | )
Premium on redemption of Preferred Shares |  |  | — |  |  |  | — |  |  |  | (3,486 | )
Income from continuing operations available to Common Shares, net of Noncontrolling Interests |  |  | 600,363 |  |  |  | 4,288,574 |  |  |  | 862,895 |
Discontinued operations, net of Noncontrolling Interests |  |  | — |  |  |  | 498 |  |  |  | 382 |
Numerator for net income per share – basic |  | $ | 600,363 |  |  | $ | 4,289,072 |  |  | $ | 863,277 |
Numerator for net income per share – diluted: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 628,381 |  |  | $ | 4,479,586 |  |  | $ | 907,621 |
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties |  |  | (2,323 | ) |  |  | (16,430 | ) |  |  | (3,657 | )
Preferred distributions |  |  | (3,091 | ) |  |  | (3,091 | ) |  |  | (3,357 | )
Premium on redemption of Preferred Shares |  |  | — |  |  |  | — |  |  |  | (3,486 | )
Income from continuing operations available to Common Shares |  |  | 622,967 |  |  |  | 4,460,065 |  |  |  | 897,121 |
Discontinued operations, net |  |  | — |  |  |  | 518 |  |  |  | 397 |
Numerator for net income per share – diluted |  | $ | 622,967 |  |  | $ | 4,460,583 |  |  | $ | 897,518 |
Denominator for net income per share – basic and diluted: |  |  |  |  |  |  |  |  |  |  |  |
Denominator for net income per share – basic |  |  | 366,968 |  |  |  | 365,002 |  |  |  | 363,498 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
OP Units |  |  | 12,901 |  |  |  | 13,827 |  |  |  | 13,576 |
Long-term compensation shares/units |  |  | 2,809 |  |  |  | 3,163 |  |  |  | 3,546 |
Denominator for net income per share – diluted |  |  | 382,678 |  |  |  | 381,992 |  |  |  | 380,620 |
Net income per share – basic |  | $ | 1.64 |  |  | $ | 11.75 |  |  | $ | 2.37 |
Net income per share – diluted |  | $ | 1.63 |  |  | $ | 11.68 |  |  | $ | 2.36 |
Net income per share – basic: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations available to Common Shares, net of Noncontrolling Interests |  | $ | 1.64 |  |  | $ | 11.75 |  |  | $ | 2.37 |
Discontinued operations, net of Noncontrolling Interests |  |  | — |  |  |  | — |  |  |  | — |
Net income per share – basic |  | $ | 1.64 |  |  | $ | 11.75 |  |  | $ | 2.37 |
Net income per share – diluted: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations available to Common Shares |  | $ | 1.63 |  |  | $ | 11.68 |  |  | $ | 2.36 |
Discontinued operations, net |  |  | — |  |  |  | — |  |  |  | — |
Net income per share – diluted |  | $ | 1.63 |  |  | $ | 11.68 |  |  | $ | 2.36 |
ERPOP [Member] |
Schedule of Calculation of Numerator and Denominator in Earning Per Share and Earnings Per Unit | 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):
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Numerator for net income per Unit – basic and diluted: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  | $ | 628,381 |  |  | $ | 4,479,586 |  |  | $ | 907,621 |
Net (income) loss attributable to Noncontrolling Interests – Partially Owned Properties |  |  | (2,323 | ) |  |  | (16,430 | ) |  |  | (3,657 | )
Allocation to Preference Units |  |  | (3,091 | ) |  |  | (3,091 | ) |  |  | (3,357 | )
Allocation to premium on redemption of Preference Units |  |  | — |  |  |  | — |  |  |  | (3,486 | )
Income from continuing operations available to Units |  |  | 622,967 |  |  |  | 4,460,065 |  |  |  | 897,121 |
Discontinued operations, net |  |  | — |  |  |  | 518 |  |  |  | 397 |
Numerator for net income per Unit – basic and diluted |  | $ | 622,967 |  |  | $ | 4,460,583 |  |  | $ | 897,518 |
Denominator for net income per Unit – basic and diluted: |  |  |  |  |  |  |  |  |  |  |  |
Denominator for net income per Unit – basic |  |  | 379,869 |  |  |  | 378,829 |  |  |  | 377,074 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Dilution for Units issuable upon assumed exercise/vesting of the Company’s long-term compensation shares/units |  |  | 2,809 |  |  |  | 3,163 |  |  |  | 3,546 |
Denominator for net income per Unit – diluted |  |  | 382,678 |  |  |  | 381,992 |  |  |  | 380,620 |
Net income per Unit – basic |  | $ | 1.64 |  |  | $ | 11.75 |  |  | $ | 2.37 |
Net income per Unit – diluted |  | $ | 1.63 |  |  | $ | 11.68 |  |  | $ | 2.36 |
Net income per Unit – basic: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations available to Units |  | $ | 1.64 |  |  | $ | 11.75 |  |  | $ | 2.37 |
Discontinued operations, net |  |  | — |  |  |  | — |  |  |  | — |
Net income per Unit – basic |  | $ | 1.64 |  |  | $ | 11.75 |  |  | $ | 2.37 |
Net income per Unit – diluted: |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations available to Units |  | $ | 1.63 |  |  | $ | 11.68 |  |  | $ | 2.36 |
Discontinued operations, net |  |  | — |  |  |  | — |  |  |  | — |
Net income per Unit – diluted |  | $ | 1.63 |  |  | $ | 11.68 |  |  | $ | 2.36 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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