Property, Plant & Equipment (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 99,645,000		$ 99,645,000		$ 93,236,000
Accumulated depreciation	(47,307,000)		(47,307,000)		(43,892,000)
Property, plant and equipment — net	52,338,000		52,338,000		49,344,000
Capital expenditures in progress	3,217,000		3,217,000		7,271,000
Capitalized interest expense	34,000	35,000	174,000	35,000
Commitments for capital expenditures in progress	$ 1,403,000		$ 1,403,000		$ 4,356,000

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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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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