Income Taxes - Open Tax Years by Major Jurisdiction (Detail)	12 Months Ended
	Dec. 31, 2017
China
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2012
Czech Republic
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2011
Germany
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2010
Italy
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2005
Korea
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2012
Luxembourg
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2012
Mexico
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2012
United States
Open Tax Years By Major Jurisdiction [Line Items]
Open tax years by major jurisdiction	2014