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
Operating Loss Carryforwards [Line Items]
Effective income tax rates	20.80%	35.40%	7.00%	35.20%
Effective Income Tax Rate Reconciliation, Percent, Excluding Change In Valuation Allowance			35.70%
Unrecognized tax benefits	$ 2.2		$ 2.2
United States Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net deferred tax asset	$ 4.6		$ 4.6