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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Property, plant and equipment
Property, plant and equipment, gross	$ 119,381		$ 118,040
Less accumulated depreciation	(64,573)		(62,612)
Property, plant and equipment, net	54,808		55,428
Depreciation expense	2,919	$ 2,309
Land
Property, plant and equipment
Property, plant and equipment, gross	987		999
Building and improvements
Property, plant and equipment
Property, plant and equipment, gross	$ 14,086		14,169
Building and improvements | Minimum
Property, plant and equipment
Useful lives	5 years
Building and improvements | Maximum
Property, plant and equipment
Useful lives	39 years
Machinery, equipment, tools and dies
Property, plant and equipment
Property, plant and equipment, gross	$ 79,150		79,738
Machinery, equipment, tools and dies | Minimum
Property, plant and equipment
Useful lives	3 years
Machinery, equipment, tools and dies | Maximum
Property, plant and equipment
Useful lives	15 years
Construction work in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 6,235		6,821
Furniture, fixtures and other
Property, plant and equipment
Property, plant and equipment, gross	$ 18,923		$ 16,313
Furniture, fixtures and other | Minimum
Property, plant and equipment
Useful lives	3 years
Furniture, fixtures and other | Maximum
Property, plant and equipment
Useful lives	10 years

X

- Definition

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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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