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Net Income Per Share Information (Basic and Diluted Net Income Per Common Share) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$ 123,227	$ 88,617	$ 261,732	$ 160,948
Denominator:
Basic shares outstanding	263,443,064	263,005,450	263,298,839	219,321,828
Dilutive effect of equity-based awards	856,408	644,688	810,544	742,842
Diluted shares outstanding	264,299,472	263,650,138	264,109,383	220,064,670

X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

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Denominator used in the computation of basic and diluted net income per common.

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Numerator used in computation of basic and diluted net income per common share.

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