Property, Plant and Equipment, at Cost (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 684,933	$ 740,421
Less: Accumulated depreciation	(384,942)	(367,954)
Total property, plant and equipment, net	299,991	372,467
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	26,652	68,562
Buildings and Leasehold Improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	204,579	205,534
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 453,702	$ 466,325