PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 110,798	$ 109,687
Less: accumulated depreciation	56,404	54,771
Net property, plant and equipment	54,394	54,916
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,053	2,054
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	19,741	19,732
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	86,498	86,147
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,506	$ 1,754

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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