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Defined Benefit Pension Plans - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]    
Net periodic benefit cost, non-service cost $ 2,523,000 $ 2,145,000
Contributions by employer 0 0
U.K. Plan    
Defined Benefit Plan Disclosure [Line Items]    
Contributions by employer $ 602,000 $ 502,000