Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 416,072	$ 411,538
Accumulated depreciation and amortization	(202,893)	(197,130)
Property, plant and equipment, Net	213,179	214,408
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	11,806	11,747
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	66,317	66,017
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	325,733	323,684
Construction-in-Process [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	4,450	2,595
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 7,766	$ 7,495