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Income Taxes Income Tax Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Taxes [Line Items]
Effective income tax rate	16.07%	2.22%
Statutory tax rate	35.00%	35.00%
Undistributed earnings of foreign subsidiaries	$ 2.3
Undistributed Earnings of Foreign Subsidiaries
Income Taxes [Line Items]
Tax effect if undistributed foreign earnings were repatriated	$ 0.3

The amount of the deferred tax liability which was not recognized because of the exceptions to comprehensive recognition of deferred taxes.

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- 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 domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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