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Net Income Per Share Information (Tables) | 9 Months Ended
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Sep. 30, 2019
Net Income Per Share Information [Abstract] |
Basic and Diluted Net Income Per Common Share | The following table sets forth the calculation of the numerator and denominator used in the computation of basic and diluted net income per common share attributable to the Company’s shareholders for the three and nine months ended September 30, 2019 and 2018: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | September 30, | ​ | September 30, | ​
​ |  | 2019 |  | 2018 |  | 2019 |  | 2018 |
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income attributable to Waste Connections for basic and diluted earnings per share | ​ | $ | 159,109 | ​ | $ | 150,843 | ​ | $ | 433,579 | ​ | $ | 414,393 | ​
Denominator: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Basic shares outstanding | ​ |  | 263,853,681 | ​ |  | 263,628,838 | ​ |  | 263,768,258 | ​ |  | 263,657,274 | ​
Dilutive effect of equity-based awards | ​ |  | 733,775 | ​ |  | 765,919 | ​ |  | 705,087 | ​ |  | 719,046 | ​
Diluted shares outstanding | ​ |  | 264,587,456 | ​ |  | 264,394,757 | ​ |  | 264,473,345 | ​ |  | 264,376,320 | ​

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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://fasb.org/us-gaap/role/ref/legacyRef -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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