Income Taxes - Narratives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Increase in unrecognized tax benefit	$ 1.3
Unrecognized tax benefits	3.4	$ 2.1
Accrued interest for uncertain tax positions	0.6	0.2
Income taxes paid	5.2	1.5	$ 1.7
Deferred tax assets, gross	22.1	24.2
Deferred tax liability, net	45.0	50.2
Deferred tax assets, valuation allowance	19.9	21.8
Operating loss carryforwards, foreign	$ 40.9	$ 42.7