Income Taxes - Tax Credit Carryforwards (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2031
Alternative minimum tax credit carryforwards	$ 0.7
Cumulative undistributed foreign earnings	331.3
Research and development tax credit carryforward [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration dates	Dec. 31, 2014
Research and development tax credit carryforward [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration dates	Dec. 31, 2033
Domestic Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	0.2
Domestic Tax Authority [Member] | Research and development tax credit carryforward [Member]
Tax Credit Carryforward [Line Items]
Research and development tax credit carryforwards	2.9
Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	14.6
Foreign Tax Authority [Member] | Research and development tax credit carryforward [Member]
Tax Credit Carryforward [Line Items]
Research and development tax credit carryforwards	$ 0.2