Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 973,150	$ 928,038
Accumulated depreciation	(420,998)	(391,352)
Property, plant and equipment, net	552,152	536,686
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	144,325	136,918
Production Machinery and Technical Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	755,148	720,175
Leasehold Improvements and Others [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,447	12,192
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 61,230	$ 58,753