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Income Taxes (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Income Taxes [Abstract]
Tax incentives	$ 3.9	$ 5.5
Net impact of holiday tax incentives, per diluted share	$ 0.07	$ 0.09
Unrecognized tax reserve	21.4
Interest on unrecognized tax	1.6
Penalty on unrecognized tax	$ 1.6
Income tax reconciliation tax holidays expiration date	2015

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position 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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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position 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.

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