Income Taxes - Unrecognized Tax Benefits and Open Tax Years (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
United States [Member]
Income Tax Contingency [Line Items]
Tax years open for examination, by major tax jurisdiction	2007
The Netherlands [Member]
Income Tax Contingency [Line Items]
Tax years open for examination, by major tax jurisdiction	2011
Czech Republic [Member]
Income Tax Contingency [Line Items]
Tax years open for examination, by major tax jurisdiction	2010
Minimum [Member]
Income Tax Contingency [Line Items]
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 0
Maximum [Member]
Income Tax Contingency [Line Items]
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 3.0