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Organization, Basis of Presentation and Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 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 six months ended
| 6/30/2015 |  | 6/30/2014 |  | 6/30/2015 |  | 6/30/2014
Basic and diluted shares outstanding |  |  |  |  |  |  |  |  |
Weighted average common shares - basic | 131,977,578 |  |  | 129,856,335 |  |  | 131,930,916 |  |  | 129,574,118 |
Weighted average DownREIT units outstanding | 7,500 |  |  | 7,500 |  |  | 7,500 |  |  | 7,500 |
Effect of dilutive securities | 1,101,361 |  |  | 384,486 |  |  | 1,192,947 |  |  | 356,614 |
Weighted average common shares - diluted | 133,086,439 |  |  | 130,248,321 |  |  | 133,131,363 |  |  | 129,938,232 |
Calculation of Earnings per Share - basic |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 172,324 |  |  | $ | 158,086 |  |  | $ | 380,469 |  |  | $ | 299,825 |
Net income allocated to unvested restricted shares | (445 | ) |  | (254 | ) |  | (975 | ) |  | (487 | )
Net income attributable to common stockholders, adjusted | $ | 171,879 |  |  | $ | 157,832 |  |  | $ | 379,494 |  |  | $ | 299,338 |
Weighted average common shares - basic | 131,977,578 |  |  | 129,856,335 |  |  | 131,930,916 |  |  | 129,574,118 |
Earnings per common share - basic | $ | 1.30 |  |  | $ | 1.22 |  |  | $ | 2.88 |  |  | $ | 2.31 |
Calculation of Earnings per Share - diluted |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 172,324 |  |  | $ | 158,086 |  |  | $ | 380,469 |  |  | $ | 299,825 |
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations | 9 |  |  | 9 |  |  | 19 |  |  | 17 |
Adjusted net income available to common stockholders | $ | 172,333 |  |  | $ | 158,095 |  |  | $ | 380,488 |  |  | $ | 299,842 |
Weighted average common shares - diluted | 133,086,439 |  |  | 130,248,321 |  |  | 133,131,363 |  |  | 129,938,232 |
Earnings per common share - diluted | $ | 1.29 |  |  | $ | 1.21 |  |  | $ | 2.86 |  |  | $ | 2.31 |

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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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