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Organization, Basis of Presentation, and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Schedule of reconciliation of income from book basis to tax basis | The following reconciles net income attributable to common stockholders to taxable net income for the years ended December 31, 2016, 2015 and 2014 (unaudited, dollars in thousands):
| 2016 Estimate |  | 2015 Actual |  | 2014 Actual
Net income attributable to common stockholders | $ | 1,034,002 |  |  | $ | 742,038 |  |  | $ | 683,567 |
GAAP gain on sale of communities (in excess of) less than tax gain | (204,767 | ) |  | (20,900 | ) |  | 22,127 |
Depreciation/amortization timing differences on real estate | (10,183 | ) |  | (24,657 | ) |  | (10,735 | )
Amortization of debt/mark to market interest | (19,763 | ) |  | (64,676 | ) |  | (38,202 | )
Tax compensation expense less than (in excess of) GAAP | 5,592 |  |  | (1,244 | ) |  | (5,252 | )
Casualty and impairment (gain) loss, net | (3,935 | ) |  | (10,542 | ) |  | — |
Other adjustments | (10 | ) |  | (12,829 | ) |  | 14,323 |
Taxable net income | $ | 800,936 |  |  | $ | 607,190 |  |  | $ | 665,828 |
Schedule of tax components of the entity's common dividends declared | The following summarizes the tax components of the Company's common dividends declared for the years ended December 31, 2016, 2015 and 2014 (unaudited):
| 2016 |  | 2015 |  | 2014
Ordinary income | 68 | % |  | 83 | % |  | 62 | %
20% capital gain | 26 | % |  | 12 | % |  | 29 | %
Unrecaptured §1250 gain | 6 | % |  | 5 | % |  | 9 | %
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 year ended
| 12/31/16 |  | 12/31/15 |  | 12/31/14
Basic and diluted shares outstanding |  |  |  |  |  |  |  |
Weighted average common shares—basic | 136,928,251 |  |  | 133,565,711 |  |  | 130,586,718 |
Weighted average DownREIT units outstanding | 7,500 |  |  | 7,500 |  |  | 7,500 |
Effect of dilutive securities | 525,886 |  |  | 1,019,966 |  |  | 643,284 |
Weighted average common shares—diluted | 137,461,637 |  |  | 134,593,177 |  |  | 131,237,502 |
Calculation of Earnings per Share—basic |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 1,034,002 |  |  | $ | 742,038 |  |  | $ | 683,567 |
Net income allocated to unvested restricted shares | (2,610 | ) |  | (1,774 | ) |  | (1,523 | )
Net income attributable to common stockholders, adjusted | $ | 1,031,392 |  |  | $ | 740,264 |  |  | $ | 682,044 |
Weighted average common shares—basic | 136,928,251 |  |  | 133,565,711 |  |  | 130,586,718 |
Earnings per common share—basic | $ | 7.53 |  |  | $ | 5.54 |  |  | $ | 5.22 |
Calculation of Earnings per Share—diluted |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 1,034,002 |  |  | $ | 742,038 |  |  | $ | 683,567 |
Add: noncontrolling interests of DownREIT unitholders in consolidated partnerships, including discontinued operations | 41 |  |  | 38 |  |  | 35 |
Adjusted net income attributable to common stockholders | $ | 1,034,043 |  |  | $ | 742,076 |  |  | $ | 683,602 |
Weighted average common shares—diluted | 137,461,637 |  |  | 134,593,177 |  |  | 131,237,502 |
Earnings per common share—diluted | $ | 7.52 |  |  | $ | 5.51 |  |  | $ | 5.21 |
Dividends per common share | $ | 5.40 |  |  | $ | 5.00 |  |  | $ | 4.64 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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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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