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Property Plant And Equipment (Details Textual) (USD $)	12 Months Ended
Property Plant And Equipment (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property Plant and Equipment (Textual) [Abstract]
Property, Plant and Equipment, Gross	$ 301,250,000	$ 306,720,000
Depreciation expense	16,500,000	18,400,000	19,600,000
Construction in process [Member]
Property Plant and Equipment (Textual) [Abstract]
Property, Plant and Equipment, Gross	$ 1,855,000	$ 2,425,000

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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