Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property and equipment
Total cost	$ 161,112	$ 154,761
Accumulated depreciation and amortization	(39,708)	(33,830)
Property and equipment, net	121,404	120,931
Land and land improvements [Member]
Property and equipment
Total cost	4,133	2,540
Buildings [Member]
Property and equipment
Total cost	28,527	26,915
Machinery, equipment and tooling [Member]
Property and equipment
Total cost	101,869	98,276
Leasehold improvements [Member]
Property and equipment
Total cost	7,696	7,712
Furniture and fixtures [Member]
Property and equipment
Total cost	941	834
Information systems [Member]
Property and equipment
Total cost	986	954
Construction in progress [Member]
Property and equipment
Total cost	$ 16,960	$ 17,530

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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