PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property, plant and equipment
Property, plant and equipment, gross	$ 179,034	$ 174,584
Accumulated depreciation	(104,970)	(103,549)
Property, plant and equipment, net	74,064	71,035
Land, buildings and improvements
Property, plant and equipment
Property, plant and equipment, gross	83,267	83,032
Machinery, equipment and fixtures
Property, plant and equipment
Property, plant and equipment, gross	77,593	73,169
Office furniture, equipment and vehicles
Property, plant and equipment
Property, plant and equipment, gross	17,786	18,058
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 388	$ 325

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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