PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Property, plant and equipment
Property, plant and equipment, gross	$ 105,752		$ 104,034
Less accumulated depreciation	(52,779)		(51,026)
Property, plant and equipment, net	52,973		53,008
Depreciation expense	2,309	$ 2,227
Land
Property, plant and equipment
Property, plant and equipment, gross	972		977
Building and improvements
Property, plant and equipment
Property, plant and equipment, gross	13,502		13,366
Machinery, equipment, tools and dies
Property, plant and equipment
Property, plant and equipment, gross	75,077		73,894
Furniture, fixtures and other
Property, plant and equipment
Property, plant and equipment, gross	$ 16,201		$ 15,797

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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