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Stockholders' Equity - AOCI (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at beginning of period $ (22,100,000) $ 285,800,000 $ 504,600,000
Foreign currency translation adjustments 39,800,000 (80,100,000) (36,600,000)
Total other comprehensive income 400,000 2,400,000 2,900,000
Balance at end of period 323,400,000 (22,100,000) 285,800,000
Foreign Currency Translation      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at beginning of period (175,300,000) (95,200,000) (58,600,000)
Foreign currency translation adjustments 39,800,000 (80,100,000) (36,600,000)
Balance at end of period (135,500,000) (175,300,000) (95,200,000)
Tax expense 0 0 0
Net amount reclassified to earnings 0 0 0
Pension Benefits      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at beginning of period (1,600,000) (4,000,000.0) (6,900,000)
Net change from period revaluation 500,000 3,200,000 3,800,000
Tax expense (100,000) (800,000) (900,000)
Balance at end of period $ (1,200,000) $ (1,600,000) $ (4,000,000.0)