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	$ 371,649	$ 314,073
Less-accumulated depreciation	112,369	83,980
Property, plant and equipment, net	259,280	230,093
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	54,833	51,992
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	302,470	251,295
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 14,346	$ 10,786