Income Taxes - NOL, foreign earnings (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Income Tax [Line Items]
Uncertain tax benefit recorded	$ 2.4
Uncertain tax benefit recorded, increase from prior years	1.5
Uncertain tax benefit recorded, increase from deferred tax asset	0.4
Uncertain tax benefit recorded, increase from current year	0.5
Internal Revenue Service (IRS)
Income Tax [Line Items]
Net operating loss carryforward	13.5
Net operating loss carryforward, subject to expiration	0.4
Canada Revenue Agency
Income Tax [Line Items]
Net operating loss carryforward	41.7
Australian Taxation Office
Income Tax [Line Items]
Net operating loss carryforward	14.6
Mexican Tax Authority
Income Tax [Line Items]
Net operating loss carryforward, subject to expiration	$ 9.5
Carryforward period	10 years
Spanish Tax Agency
Income Tax [Line Items]
Net operating loss carryforward, not subject to expiration	$ 13.9