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Capital (Tables) | 12 Months Ended
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Dec. 31, 2016
Stockholders' Equity Note Disclosure, Disclosure of Compensation Related Costs, Share-based Payments and Earnings Per Share [Abstract] |
Dividends Declared | The following table summarizes the dividends paid on our operating partnership units for the years ended December 31, 2016, 2015 and 2014:
Record Date |  | Payment Date |  | Amount per Operating Partnership Unit
December 15, 2016 |  | December 29, 2016 |  | $0.105
September 19, 2016 |  | September 30, 2016 |  | $0.105
June 15, 2016 |  | June 30, 2016 |  | $0.105
March 16, 2016 |  | March 31, 2016 |  | $0.085
December 15, 2015 |  | December 31, 2015 |  | $0.085
September 15, 2015 |  | September 30, 2015 |  | $0.085
June 15, 2015 |  | June 30, 2015 |  | $0.085
March 13, 2015 |  | March 31, 2015 |  | $0.085
December 15, 2014 |  | December 31, 2014 |  | $0.085
September 15, 2014 |  | September 30, 2014 |  | $0.085
June 13, 2014 |  | June 30, 2014 |  | $0.085
March 14, 2014 |  | March 31, 2014 |  | $0.085
Summary of Restricted Stock and Long-Term Incentive Plan Activity | The following is a summary of ESRT restricted stock and LTIP unit activity for the year ended December 31, 2016:
| ESRT Restricted Stock |  | LTIP Units |  | Weighted Average Grant Fair Value
Unvested balance at December 31, 2015 | 97,592 |  |  | 1,415,895 |  |  | $ | 11.04 |
Vested | (36,592 | ) |  | (402,895 | ) |  | 11.69 |
Granted | 47,071 |  |  | 1,868,629 |  |  | 9.58 |
Forfeited | (278 | ) |  | — |  |  | 17.97 |
Unvested balance at December 31, 2016 | 107,793 |  |  | 2,881,629 |  |  | $ | 10.01 |
Schedule of Earnings Per Unit, Basic and Diluted | Earnings per unit for the years ended December 31, 2016, 2015 and 2014 is computed as follows (amounts in thousands, except per share amounts):
| Year ended December 31, 2016 |  | Year ended December 31, 2015 |  | Year ended December 31, 2014
Numerator: |  |  |  |  |
Net income | $ | 107,250 |  |  | $ | 79,928 |  |  | $ | 70,210 |
Private perpetual preferred unit distributions | (936 | ) |  | (936 | ) |  | (476 | )
Earnings allocated to unvested shares | (747 | ) |  | (550 | ) |  | (482 | )
Net income attributable to common unitholders - basic and diluted | $ | 105,567 |  |  | $ | 78,442 |  |  | $ | 69,252 |
Denominator: |  |  |  |  |
Weighted average units outstanding - basic | 276,848 |  |  | 265,914 |  |  | 254,506 |
Effect of dilutive securities: |  |  |  |  |
Stock-based compensation plans | 454 |  |  | — |  |  | — |
Exchangeable senior notes | 266 |  |  | — |  |  | — |
Weighted average shares outstanding - diluted | 277,568 |  |  | 265,914 |  |  | 254,506 |
Earnings per unit - basic and diluted | $ | 0.38 |  |  | $ | 0.29 |  |  | $ | 0.27 |

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- Definition Stockholders' Equity Note Disclosure, Disclosure of Compensation Related Costs, Share-based Payments and Earnings Per Share [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + 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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