Net Income Per Share Information (Tables)

3 Months Ended

Mar. 31, 2012

Net Income Per Share Information [Abstract]

Basic and Diluted net income per common share

	Three months ended March 31,
	2012		2011
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$	31,303	$	36,539
Denominator:
Basic shares outstanding		115,188,134		113,519,266
Dilutive effect of stock options and warrants		339,747		476,624
Dilutive effect of restricted stock units		348,580		405,414
Diluted shares outstanding		115,876,461		114,401,304