PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property, plant and equipment
Property, plant and equipment, gross	$ 170,830	$ 168,162
Accumulated depreciation	(100,579)	(99,958)
Property, plant and equipment, net	70,251	68,204
Land, buildings and improvements
Property, plant and equipment
Property, plant and equipment, gross	80,530	73,657
Machinery, equipment and fixtures
Property, plant and equipment
Property, plant and equipment, gross	69,040	68,303
Office furniture, equipment and vehicles
Property, plant and equipment
Property, plant and equipment, gross	16,629	16,990
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 4,631	$ 9,212

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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