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 of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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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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Property, Plant and Equipment, Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Property, Plant & Equipment [Line Items]
Property, plant & equipment, gross	$ 208,287		$ 208,287		$ 208,152
Less: accumulated depreciation and amortization	(85,384)		(85,384)		(91,655)
Total property, plant and equipment, net	122,903		122,903		116,497
Depreciation and amortization expense	2,700	$ 2,500	5,700	$ 5,000
Impairment of long-lived assets			7,275	$ 0
Land
Property, Plant & Equipment [Line Items]
Property, plant & equipment, gross	13,450		13,450		13,450
Buildings
Property, Plant & Equipment [Line Items]
Property, plant & equipment, gross	69,643		69,643		75,654
Machinery, equipment and fixtures
Property, Plant & Equipment [Line Items]
Property, plant & equipment, gross	88,728		88,728		87,763
Computer software
Property, Plant & Equipment [Line Items]
Property, plant & equipment, gross	20,931		20,931		20,739
Construction in progress
Property, Plant & Equipment [Line Items]
Property, plant & equipment, gross	$ 15,535		$ 15,535		$ 10,546