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Defined Benefit Pension Plans - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]        
Net periodic benefit cost, non-service cost $ 2,194,000 $ (465,000) $ 6,531,000 $ (1,478,000)
Contributions by employer     0  
U.K. Plan        
Defined Benefit Plan Disclosure [Line Items]        
Contributions by employer     $ 1,795,000 $ 487,000