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Restructuring and Relocation (Other Severance) (Details) (Other severance, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Other severance
Restructuring Cost and Reserve
Amounts expensed	$ 3,000

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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