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Organization, Basis of Presentation and Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2015
Accounting Policies [Abstract] |
Schedule of earnings per common share | The Company’s earnings per common share are determined as follows (dollars in thousands, except per share data):
| For the three months ended |  | For the nine months ended
| 9/30/2015 |  | 9/30/2014 |  | 9/30/2015 |  | 9/30/2014
Basic and diluted shares outstanding |  |  |  |  |  |  |  |  |
Weighted average common shares - basic | 133,669,584 |  |  | 131,330,078 |  |  | 132,516,847 |  |  | 130,165,873 |
Weighted average DownREIT units outstanding | 7,500 |  |  | 7,500 |  |  | 7,500 |  |  | 7,500 |
Effect of dilutive securities | 1,032,376 |  |  | 568,417 |  |  | 1,139,423 |  |  | 554,627 |
Weighted average common shares - diluted | 134,709,460 |  |  | 131,905,995 |  |  | 133,663,770 |  |  | 130,728,000 |
Calculation of Earnings per Share - basic |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 206,142 |  |  | $ | 241,100 |  |  | $ | 586,610 |  |  | $ | 540,929 |
Net income allocated to unvested restricted shares | (467 | ) |  | (366 | ) |  | (1,444 | ) |  | (858 | )
Net income attributable to common stockholders, adjusted | $ | 205,675 |  |  | $ | 240,734 |  |  | $ | 585,166 |  |  | $ | 540,071 |
Weighted average common shares - basic | 133,669,584 |  |  | 131,330,078 |  |  | 132,516,847 |  |  | 130,165,873 |
Earnings per common share - basic | $ | 1.54 |  |  | $ | 1.83 |  |  | $ | 4.42 |  |  | $ | 4.15 |
Calculation of Earnings per Share - diluted |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 206,142 |  |  | $ | 241,100 |  |  | $ | 586,610 |  |  | $ | 540,929 |
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations | 9 |  |  | 9 |  |  | 28 |  |  | 26 |
Adjusted net income available to common stockholders | $ | 206,151 |  |  | $ | 241,109 |  |  | $ | 586,638 |  |  | $ | 540,955 |
Weighted average common shares - diluted | 134,709,460 |  |  | 131,905,995 |  |  | 133,663,770 |  |  | 130,728,000 |
Earnings per common share - diluted | $ | 1.53 |  |  | $ | 1.83 |  |  | $ | 4.39 |  |  | $ | 4.14 |

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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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