Net Income Per Share Information

12 Months Ended

Dec. 31, 2011

Net Income Per Share Information [Abstract]

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, 2011, 2010 and 2009:

	Years Ended December 31,
	2011		2010		2009
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$	165,239	$	135,104	$	109,825
Denominator:
Basic shares outstanding		112,720,444		115,646,173		119,119,601
Dilutive effect of stock options and warrants		425,085		833,502		1,158,094
Dilutive effect of restricted stock units		437,957		414,529		228,467
Diluted shares outstanding		113,583,486		116,894,204		120,506,162

The 2026 Notes were not dilutive during the year ended December 31, 2009. On April 1, 2010, the Company redeemed the aggregate principal amount of its 2026 Notes.

Additionally, as of December 31, 2011, 2010 and 2009, warrants to purchase 5,301, 18,712 and 38,240 shares of common stock, respectively, were excluded from the computation of diluted earnings per share as they were anti-dilutive. As of December 31, 2011, 2010 and 2009, all outstanding stock options were dilutive and included in the computation of diluted earnings per share.