Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	$ 401,886	$ 418,322
Accumulated depreciation and amortization	(237,307)	(232,661)
Property, plant and equipment, net	164,579	185,661
Land and Land Improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	9,340	10,207
Buildings [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	60,922	65,425
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	319,264	332,378
Construction-in-Process [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	5,545	3,499
Other [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	$ 6,815	$ 6,813