PROPERTY, PLANT AND EQUIPMENT (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, plant and equipment
Property, plant and equipment, gross	$ 636,232,000	$ 540,034,000
Less accumulated depreciation	(173,508,000)	(125,792,000)
Property, plant and equipment, net	462,724,000	414,242,000
Depreciation expense	54,800,000	45,600,000	23,900,000
Land
Property, plant and equipment
Property, plant and equipment, gross	42,920,000	44,110,000
Buildings
Property, plant and equipment
Property, plant and equipment, gross	220,039,000	216,182,000
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	262,226,000	207,136,000
Other equipment and leasehold improvements
Property, plant and equipment
Property, plant and equipment, gross	55,207,000	49,114,000
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 55,840,000	$ 23,492,000

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 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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