Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Change in tax rate, income tax expense		$ 0.3
GILTI, income tax expense	$ 1.9	3.1
FDII decrease in income tax expense	$ 0.8	$ 0.6
Deferred tax asset cumulative loss position term	3 years	3 years
Reversal of valuation allowance		$ 6.3
Deferred tax assets, income tax benefit		3.0
Unrecognized tax benefits, if recognized, would affect the effective tax rate	$ 1.0	0.8
Interest and penalties expense (benefit)	0.1	(0.1)
Payment of interest and penalties accrued	0.2	$ 0.1
Decrease in unrecognized tax benefits is reasonably possible	0.1
Undistributed earnings	194.9
Undistributed earnings, subject to transition tax	146.8
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	1.5
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	26.5
Operating loss carryforward, subject to expiration	12.4
Tax credit carryforward	0.1
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	$ 2.3