Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective tax rate	39.50%	40.90%	39.60%	40.20%
Total gross amount of unrecognized tax benefits that would impact effective tax rate	$ 0.6		$ 0.6		$ 0.6
Potential impact on total gross amount of unrecognized tax benefits due to expiration of statute of limitations	$ 0.2		$ 0.2