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Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Taxes (Textual) [Abstract]
Estimated annual effective tax rate			36.30%	36.90%
Discrete tax item	$ 0.3		$ 0.9
Effective tax rate	32.70%	41.60%	31.70%	37.00%

- 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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