Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 0.2		$ 0.2		$ 0.2
Effective Income Tax Rate, Continuing Operations	32.80%	25.60%	33.10%	43.20%
Unrecognized Tax Benefits, Decreases Resulting from Current Period Tax Positions		$ 0		$ 0