Segment Information (Income Loss Before Provision for Income Tax of Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Income Loss From Continuing Operations Before Provision For Income Tax [Line Items]
Income Loss From Continuing Operations Before Provision For Income Tax Segment	$ 201,695	$ 201,479	$ 405,764	$ 598,134
US Segment Reporting Information [Member]
Segment Income Loss From Continuing Operations Before Provision For Income Tax [Line Items]
Income Loss From Continuing Operations Before Provision For Income Tax Segment	105,867	156,678	450,719	390,009
Canada Segment Reporting Information [Member]
Segment Income Loss From Continuing Operations Before Provision For Income Tax [Line Items]
Income Loss From Continuing Operations Before Provision For Income Tax Segment	41,869	37,520	113,836	127,613
Europe And South Africa Segment Reporting Information [Member]
Segment Income Loss From Continuing Operations Before Provision For Income Tax [Line Items]
Income Loss From Continuing Operations Before Provision For Income Tax Segment	41,553	32,166	74,756	58,363
Asia Pacific Segment Reporting Information [Member]
Segment Income Loss From Continuing Operations Before Provision For Income Tax [Line Items]
Income Loss From Continuing Operations Before Provision For Income Tax Segment	17,112	(16,483)	(258,818)	39,443
Corporate And Other Segment Reporting Information [Member]
Segment Income Loss From Continuing Operations Before Provision For Income Tax [Line Items]
Income Loss From Continuing Operations Before Provision For Income Tax Segment	$ (4,706)	$ (8,402)	$ 25,271	$ (17,294)