Property, Plant & Equipment, Net - Schedule of Property, Plant & Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant & Equipment [Line Items]
Property, plant and equipment, gross	$ 196,583	$ 208,152
Less: accumulated depreciation and amortization	(76,412)	(91,655)
Property, plant and equipment, net	120,171	116,497
Land
Property, Plant & Equipment [Line Items]
Property, plant and equipment, gross	13,450	13,450
Buildings
Property, Plant & Equipment [Line Items]
Property, plant and equipment, gross	70,381	75,654
Machinery, equipment and fixtures
Property, Plant & Equipment [Line Items]
Property, plant and equipment, gross	77,854	87,763
Computer software
Property, Plant & Equipment [Line Items]
Property, plant and equipment, gross	23,644	20,739
Construction in progress
Property, Plant & Equipment [Line Items]
Property, plant and equipment, gross	$ 11,254	$ 10,546

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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