Income Taxes - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Investments, Owned, Federal Income Tax Note [Line Items]
Research and development credit carryforwards		$ 2.2	$ 2.1
Undistributed earnings of foreign subsidiaries		70.9
Scenario, Forecast
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards	$ 9.2
Foreign Tax Authority
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards, not subject to expiration		6.7
Net operating loss carryforwards, subject to expiration		$ 2.4
Adjustments for New Accounting Pronouncement
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred income tax asset, current			(23.2)
Deferred income tax liability, current			$ (4.1)