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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Income Taxes [Abstract]
U.S. federal tax rate	35.00%	35.00%
Unrecognized income tax benefits	$ 5.4		$ 5.0
Recognized additional liabilities	$ 0.4	$ 0.1

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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