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Net Income per Common Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share Reconciliation [Abstract] |
Net Income per Common Share | Net Income per Common Share Basic net income per common share is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during each period. Diluted net income per common share is computed by dividing net income available to common stockholders, plus income attributable to dilutive shares and convertible common units, for the period by the weighted average number of common shares that would have been outstanding assuming the issuance of common shares for all potentially dilutive common shares outstanding during the reporting period. The following is a reconciliation of the denominator of the basic net income per common share computation to the denominator of the diluted net income per common share computation.
| Three months ended September 30, |  |  |  | Nine months ended September 30, |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
Weighted average shares used for the basic net income per share computation | 290,664,368 |  | 275,511,870 |  | 286,599,191 |  | 270,584,365
Incremental shares from share-based compensation | 225,796 |  | 221,779 |  | 189,072 |  | 224,727
Weighted average partnership common units convertible to common shares that were dilutive | 317,022 |  | 317,022 |  | 317,022 |  | 317,022
Weighted average shares used for diluted net income per share computation | 291,207,186 |  | 276,050,671 |  | 287,105,285 |  | 271,126,114
Unvested shares from share-based compensation that were anti-dilutive | 261 |  | 15,798 |  | 1,378 |  | 17,719
Weighted average partnership common units convertible to common shares that were anti-dilutive | 397,690 |  | 88,182 |  | 271,890 |  | 88,182

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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