Income Taxes (Tax holidays) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
KOREA, REPUBLIC OF
Income Tax Holiday [Line Items]
Income Tax Holiday, Aggregate Dollar Amount	$ 3.0	$ 25.4
Foreign Operations Statutory Tax Rate	24.20%
PHILIPPINES
Income Tax Holiday [Line Items]
Income Tax Holiday, Aggregate Dollar Amount	$ 2.7	$ 5.9	$ 3.4
Foreign Operations Statutory Tax Rate		5.00%
CHINA
Income Tax Holiday [Line Items]
Income Tax Holiday Initial Tax Exemption Percentage	100.00%
Income Tax Holiday Reduced Tax Exemption Percentage	50.00%
Foreign Operations Statutory Tax Rate	24.00%
Foreign Operations Expected Statutory Tax Rate Percentage	25.00%
SINGAPORE
Income Tax Holiday [Line Items]
Income Tax Holiday Initial Tax Exemption Percentage	100.00%
TAIWAN, PROVINCE OF CHINA
Income Tax Holiday [Line Items]
Foreign Operations Statutory Tax Rate	17.00%
Tax Exemption Period Through 2010 [Member] | Gwangju [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Initial Tax Exemption Percentage	100.00%
Tax Exemption Period Through 2013 [Member] | Gwangju [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Reduced Tax Exemption Percentage	50.00%
Tax Exemption Period Through 2011 [Member] | Seoul [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Initial Tax Exemption Percentage	100.00%
Tax Exemption Period Through 2011 [Member] | Pupyong [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Initial Tax Exemption Percentage	100.00%
Tax Exemption Period Through 2014 [Member] | Seoul [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Reduced Tax Exemption Percentage	50.00%
Tax Exemption Period Through 2014 [Member] | Pupyong [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Reduced Tax Exemption Percentage	50.00%
Tax Exemption Period Through 2015 [Member] | Gwangju [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Initial Tax Exemption Percentage	100.00%
Tax Exemption Period Through 2017 [Member] | Gwangju [Member]
Income Tax Holiday [Line Items]
Income Tax Holiday Reduced Tax Exemption Percentage	50.00%