PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 100,829	$ 86,867
Less: Accumulated depreciation	48,104	42,585
Property, plant and equipment, net	52,725	44,282
Depreciation expense	5,672	5,323	4,644
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,998	1,971
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,526	15,680
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	70,859	66,584
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 11,446	$ 2,632

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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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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- Definition

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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