Property, Plant and Equipment - Summary of Carrying Values of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 944,459	$ 907,562
Accumulated depreciation	(578,489)	(570,240)
Net property, plant and equipment	365,970	337,322
Land and land improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	30,173	31,963
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	141,009	148,598
Machinery and equipment
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	569,359	543,594
Computer equipment and software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	139,773	136,509
Construction in process
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 64,145	$ 46,898