Net Income Per Share Information (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Per Share Information [Abstract]

Basic and Diluted net income per common share

	Three months ended				Nine months ended
	September 30,				September 30,
	2011		2010		2011		2010
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$	46,329	$	40,986	$	127,281	$	98,959
Denominator:
Basic shares outstanding		112,327,410		115,594,327		113,130,314		116,129,247
Dilutive effect of stock options and warrants		407,555		731,763		445,117		930,747
Dilutive effect of restricted stock units		457,919		452,763		403,734		361,704
Diluted shares outstanding		113,192,884		116,778,853		113,979,165		117,421,698