Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Reductions due to expiry of statute of limitations, gross	$ 1.1
Reductions due to expiry of statute of limitations may be recognized by the end of 2021	0.3
Unrecognized tax benefits that would impact effective tax rate	0.4	$ 0.5	$ 0.5
Unrecognized tax benefits, income tax penalties and interest expense	0.0	0.1	0.0
Undistributed earnings of foreign subsidiaries	70.3	56.4	47.2
Deferred tax liability not recognized, amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries	1.0	0.8	0.7
Tax losses and tax credit carryforward, amount	106.3	104.2	94.9
Tax losses and tax credit carryforward, valuation allowance	18.0	19.3	14.9
Tax Losses And Tax Credits Carryforward, Expire Between 2023 and 2034
Operating Loss Carryforwards [Line Items]
Tax losses and tax credit carryforward, amount	13.4
Tax Losses And Tax Credits Carryforward, Indefinite
Operating Loss Carryforwards [Line Items]
Tax losses and tax credit carryforward, amount	99.2
U.K.
Operating Loss Carryforwards [Line Items]
Tax losses and tax credit carryforward, amount	43.0	30.0	32.8
Tax losses and tax credit carryforward, valuation allowance	4.1	3.2	2.8
Non-U.K.
Operating Loss Carryforwards [Line Items]
Tax losses and tax credit carryforward, amount	63.3	74.2	62.1
Tax losses and tax credit carryforward, valuation allowance	$ 13.9	$ 16.1	$ 12.1