Goodwill (Tables)

9 Months Ended

Sep. 30, 2011

Goodwill [Abstract]

Changes In Goodwill

Goodwill, as at December 31, 2010	$	1,450,273
Impairment charges during the period		(546,930	)
Acquisitions during the period		269,555
Foreign exchange impact		(108,169	)
Goodwill, as at September 30, 2011	$	1,064,729