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Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
Income Taxes (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Taxes
Income tax expense (benefit)	$ (7,805,000)	$ 1,805,000	$ (6,798,000)	$ 3,891,000
Effective tax rate (as a percent)			(150.90%)	37.40%
Income tax benefit related to extraterritorial income			$ 8,600,000

- Definition

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 sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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