Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 421,168	$ 350,049
Less: accumulated depreciation	(231,356)	(184,521)
Property, plant and equipment, net	205,903	179,793
Buildings and Related Structures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	69,958	64,939
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	308,713	255,618
Others [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	42,497	29,492
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 16,091	$ 14,265