Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,053,962	$ 1,058,220
Accumulated depreciation	(546,925)	(528,938)
Property, plant and equipment, net	507,037	529,282
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	168,758	158,907
Production Machinery and Technical Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	829,983	856,961
Leasehold Improvements and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,176	12,173
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 44,045	$ 30,179