Goodwill (Schedule Of Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Balance	$ 91,234
Additions (note 23)	23,972
Impairment of Goodwill (note 8)	(23,574)
Foreign exchange movement	675
Goodwill, Balance	$ 92,307