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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]      
Unrecognized tax benefits that would impact effective tax rate $ 0.0 $ 0.1 $ 0.3
Unrecognized tax benefits, income tax penalties and interest expense 0.0 0.0 0.0
Undistributed earnings of foreign subsidiaries 108.6 92.6 83.1
Deferred tax liability not recognized, amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries 1.2 1.3 1.2
Tax losses and tax credit carryforward, amount 74.5 75.8 74.8
Tax losses and tax credit carryforward, valuation allowance 17.4 17.0 16.5
Tax losses and tax credits carryforward, expire Between 2023 and 2033      
Operating Loss Carryforwards [Line Items]      
Tax losses and tax credit carryforward, amount 8.5    
Tax losses and tax credits carryforward, indefinite      
Operating Loss Carryforwards [Line Items]      
Tax losses and tax credit carryforward, amount 61.0    
U.K.      
Operating Loss Carryforwards [Line Items]      
Tax losses and tax credit carryforward, amount 15.4 16.5 15.6
Tax losses and tax credit carryforward, valuation allowance 3.8 3.9 3.5
Non-U.K.      
Operating Loss Carryforwards [Line Items]      
Tax losses and tax credit carryforward, amount 59.1 59.3 59.2
Tax losses and tax credit carryforward, valuation allowance $ 13.6 $ 13.1 $ 13.0