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Income Taxes (Narrative) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Valuation allowances	$ 9.9	$ 6.6
Tunisia [Member]
Valuation allowances		$ 26.5

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

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