Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Loss Carryforwards [Line Items]
Effective income tax rates	6.40%	40.00%
Effective Income Tax Rate Reconciliation, Percent, Excluding Change In Valuation Allowance	43.30%
Unrecognized tax benefits	$ 2.2
United States Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net deferred tax asset	$ 3.8