Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Effective income tax rate	31.80%	18.60%	26.00%	17.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%
Tax credit carryforward					$ 21.8
Liability for uncertain tax positions from continuing operations	$ 1.2		$ 1.2		1.3
Liability for uncertain tax positions from discontinued operations	1.0		1.0		1.1
Liability for uncertain tax positions	$ 2.2		$ 2.2		2.4
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward expiration period			10 years
Tax credit carryforward					$ 12.7