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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Property and equipment - net (Details) (USD $) In Thousands, unless otherwise specified							9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Land [Member]	Dec. 31, 2011 Land [Member]	Sep. 30, 2012 Building [Member]	Dec. 31, 2011 Building [Member]	Sep. 30, 2012 Building [Member] Maximum [Member]	Sep. 30, 2012 Building [Member] Minimum [Member]	Sep. 30, 2012 Building Improvements [Member]	Dec. 31, 2011 Building Improvements [Member]	Sep. 30, 2012 Building Improvements [Member] Maximum [Member]	Sep. 30, 2012 Building Improvements [Member] Minimum [Member]	Sep. 30, 2012 Machinery and Equipment [Member]	Dec. 31, 2011 Machinery and Equipment [Member]	Sep. 30, 2012 Machinery and Equipment [Member] Maximum [Member]	Sep. 30, 2012 Machinery and Equipment [Member] Minimum [Member]	Sep. 30, 2012 Furniture, fixtures and office equipment [Member]	Dec. 31, 2011 Furniture, fixtures and office equipment [Member]	Sep. 30, 2012 Furniture, fixtures and office equipment [Member] Maximum [Member]	Sep. 30, 2012 Furniture, fixtures and office equipment [Member] Minimum [Member]	Sep. 30, 2012 Computer equipment and software [Member]	Dec. 31, 2011 Computer equipment and software [Member]	Sep. 30, 2012 Computer equipment and software [Member] Maximum [Member]	Sep. 30, 2012 Leasehold Improvements [Member]	Dec. 31, 2011 Leasehold Improvements [Member]	Sep. 30, 2012 Construction in progress [Member]	Dec. 31, 2011 Construction in progress [Member]
Property and equipment - net
Estimated Useful Life							40 years	39 years			40 years	5 years			15 years	3 years			10 years	5 years			3 years
Property, Plant and Equipment, Gross	$ 286,084	$ 284,793	$ 5,273	$ 5,273	$ 54,948	$ 54,948			$ 114,245	$ 114,247			$ 82,402	$ 83,476			$ 5,199	$ 5,249			$ 12,177	$ 13,049		$ 48	$ 53	$ 11,792	$ 8,498
Less accumulated depreciation and amortization	(99,473)	(91,764)
Property and equipment - net	$ 186,611	$ 193,029