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Restructuring Charges (Summary of Special Charges) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Special charges	$ 0	$ (84)	$ 2,498
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Special charges	0	197	566
Special Charges (Income)
Restructuring Cost and Reserve [Line Items]
Special charges	0	(281)	1,802
Other (Income) Expense
Restructuring Cost and Reserve [Line Items]
Special charges	$ 0	$ 0	$ 130

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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