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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Taxes [Abstract]
Unrecognized tax benefits that would impact effective tax rate	$ 3,258
Accrued interest and penalties	406
Reduction of unrecognized tax benefits for the expiration of statute of limitations in various jurisdictions and settlements of foreign audits	61
Income Tax benefits relating to stock plans	612	377
Unrecognized Tax Benefits	$ 3,476

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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