Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income Taxes
Balance at the beginning of the period, unrecognized tax benefits			$ 36,846
Additions based on current year positions			3,920
Reductions based on prior year positions			1,336
Decreases due to settlements and/or reduction in liabilities			(9,569)
Currency translation adjustments			(778)
Balance at the end of the period, Goodwill gross unrecognized tax benefits	$ 31,755		$ 31,755
Effective income tax rate (as a percent)	35.10%	41.60%	36.70%	42.30%

The gross amount of increases in unrecognized tax benefits resulting from foreign currency translation adjustments.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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-Glossary Unrecognized Tax Benefit

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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