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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services 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 (Details) - 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 and equipment
Property, plant and equipment, gross	$ 108,977		$ 108,977		$ 104,034
Less accumulated depreciation	(55,512)		(55,512)		(51,026)
Property, plant and equipment, net	53,465		53,465		53,008
Depreciation expense	2,394	$ 2,238	4,703	$ 4,465
Land
Property, plant and equipment
Property, plant and equipment, gross	976		976		977
Building and improvements
Property, plant and equipment
Property, plant and equipment, gross	13,604		13,604		13,366
Machinery, equipment, tools and dies
Property, plant and equipment
Property, plant and equipment, gross	77,565		77,565		73,894
Furniture, fixtures and other
Property, plant and equipment
Property, plant and equipment, gross	$ 16,832		$ 16,832		$ 15,797