11. PROPERTY AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant and Equipment Income Statement Disclosures [Abstract]
Facilities and plant equipment		$ 169,229	$ 168,036
Land		2,570	2,570
Other equipment, vehicles and furniture		5,280	4,918
Construction in progress		4,014	3,328
Property, Plant and Equipment, Gross		181,093	178,852
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		(30,684)	(19,235)
Property, Plant and Equipment, Net	$ 147,863	$ 150,409	$ 159,617

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, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

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Gross amount, at the balance sheet date, of long-lived, depreciable assets commonly used in offices and stores. Examples include desks, chairs, and store fixtures.

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Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.

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Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services.

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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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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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