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 assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

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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 of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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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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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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 165,654		$ 165,654			$ 163,804
Accumulated depreciation	(123,310)		(123,310)			(119,872)
Property, plant and equipment, net	42,344		42,344			43,932
Depreciation expense	2,500	$ 2,900	5,000	$ 6,100
Assets held for sale					$ 1,500
Net proceeds	5,800		5,784	53
Pretax gain on sale	4,257	$ 0	4,257	$ 0
Land [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	1,433		1,433			2,251
Buildings and Improvements [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	29,319		29,319			30,119
Machinery and Equipment [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	129,386		129,386			126,747
Construction in Progress [Member]
Property, plant and equipment [Abstract]
Property, plant and equipment, gross	$ 5,516		$ 5,516			$ 4,687