Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 678,848	$ 740,421
Less: Accumulated depreciation	(391,177)	(367,954)
Total property, plant and equipment, net	287,671	372,467
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	26,652	68,562
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	203,920	205,534
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 448,276	$ 466,325