PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, plant and equipment
Property, plant and equipment, gross	$ 540,034,000	$ 404,463,000
Less accumulated depreciation	(125,792,000)	(122,711,000)
Property, plant and equipment, net	414,242,000	281,752,000
Depreciation expense	45,600,000	23,900,000	18,800,000
Land
Property, plant and equipment
Property, plant and equipment, gross	44,110,000	25,528,000
Buildings
Property, plant and equipment
Property, plant and equipment, gross	216,182,000	159,712,000
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	207,136,000	145,292,000
Other equipment and leasehold improvements
Property, plant and equipment
Property, plant and equipment, gross	49,114,000	65,597,000
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 23,492,000	$ 8,334,000

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, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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