Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	$ 406,068	$ 418,322
Accumulated depreciation and amortization	(234,689)	(232,661)
Property, plant and equipment, net	171,379	185,661
Land and Land Improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	9,941	10,207
Buildings [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	62,001	65,425
Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	322,979	332,378
Construction-in-Process [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	4,333	3,499
Other [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, Gross	$ 6,814	$ 6,813