Income Taxes (Remaining Tax Years Subject to Examination) (Details)	12 Months Ended
	Dec. 31, 2012
Minimum [Member] | United States
Income Tax Examination [Line Items]
Tax years subject to examination	2010
Minimum [Member] | United Kingdom
Income Tax Examination [Line Items]
Tax years subject to examination	2011
Minimum [Member] | Canada
Income Tax Examination [Line Items]
Tax years subject to examination	2008
Minimum [Member] | Korea
Income Tax Examination [Line Items]
Tax years subject to examination	2007
Minimum [Member] | Australia
Income Tax Examination [Line Items]
Tax years subject to examination	2008
Maximum [Member] | United States
Income Tax Examination [Line Items]
Tax years subject to examination	2013
Maximum [Member] | United Kingdom
Income Tax Examination [Line Items]
Tax years subject to examination	2013
Maximum [Member] | Canada
Income Tax Examination [Line Items]
Tax years subject to examination	2013
Maximum [Member] | Korea
Income Tax Examination [Line Items]
Tax years subject to examination	2013
Maximum [Member] | Australia
Income Tax Examination [Line Items]
Tax years subject to examination	2013