Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Change in tax rate, income tax expense (benefit)	$ 0.3
GILTI, income tax expense (benefit)	3.1
FDII income tax expense (benefit)	$ 0.6
Deferred tax asset cumulative loss position term	3 years	3 years
Valuation allowances	$ 5.3	$ 11.6
Deferred tax assets, income tax expense	3.0
Deferred tax assets, deferred taxes	3.3
Unrecognized tax benefits, if recognized, would affect the effective tax rate	0.8	0.9
Net interest and penalties	(0.1)	(0.3)
Payment of interest and penalties accrued	0.1	0.2
Decrease in unrecognized tax benefits is reasonably possible	0.1
Undistributed earnings	183.5
Undistributed earnings, subject to transition tax	176.5
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	26.5
Tax credit carryforward	0.1
Operating loss carryforward, subject to expiration	8.9
Valuation allowances	6.3	$ 6.3
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	2.2
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	$ 1.4