Property, Plant and Equipment - Schedule 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	$ 379,288	$ 337,117
Less-Accumulated depreciation	(187,370)	(160,074)
Property, plant and equipment, net	191,918	177,043
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	31,228	28,098
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	79,468	69,350
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 268,592	$ 239,669