EARNINGS PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Common Share

The following table sets forth the computation of basic and diluted earnings per share:

In thousands, except share and per share data
	Three Months Ended March 31,
	2013		2012
Numerator:
Numerator for basic earnings per share Net income attributable to Stericycle, Inc.	$	74,617	$	64,857
Denominator:
Denominator for basic earnings per share weighted average shares	86,093,301		84,828,280
Effect of diluted securities:
Employee stock options	1,366,196		1,759,664
Denominator for diluted earnings per share-adjusted weighted average shares and after assumed conversions	87,459,497		86,587,944
Earnings per share – Basic	$	0.87	$	0.76
Earnings per share – Diluted	$	0.85	$	0.75