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Restructuring (Narrative) (Details) (USD $)	3 Months Ended			6 Months Ended
Restructuring (Narrative) (Details) (USD $)	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Restructuring
Separation agreement expense		$ 4,200,000
Restructuring charges	$ 5,926,000		$ 1,158,000	$ 10,402,000	$ 2,698,000

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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