Net Income Per Share Information

12 Months Ended

Dec. 31, 2012

Net Income Per Share Information

16. NET INCOME PER SHARE INFORMATION

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 common stockholders for the years ended December 31, 2012, 2011 and 2010:

	Years Ended December 31,
	2012		2011		2010
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$	159,093	$	165,239	$	135,104
Denominator:
Basic shares outstanding		121,172,381		112,720,444		115,646,173
Dilutive effect of stock options and warrants		308,681		425,085		833,502
Dilutive effect of restricted stock units		343,287		437,957		414,529
Diluted shares outstanding		121,824,349		113,583,486		116,894,204

As of December 31, 2012, 2011 and 2010, warrants to purchase 75,352, 5,301 and 18,712 shares of common stock, respectively, were excluded from the computation of diluted earnings per share as they were anti-dilutive. As of December 31, 2012, 2011 and 2010, all outstanding stock options were dilutive and included in the computation of diluted earnings per share.