Property Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Land	$ 6,791	$ 6,800
Buildings and Improvements, Gross	91,593	81,628
Machinery and Equipment, Gross	213,095	196,254
Property, Plant and Equipment, Gross	311,479	284,682
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(186,061)	(169,387)
Property, Plant and Equipment, Net	$ (125,418)	$ (115,295)	$ (104,223)

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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