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Defined Pension Plans - Schedule of Net Periodic Pension Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2023
Dec. 31, 2022
Pension Plan            
Defined Benefit Plan Disclosure [Line Items]            
Interest cost on projected benefit obligation           $ 3,293
Expected return on plan assets           (5,857)
Net periodic pension (benefit) cost $ 129 $ 616 $ (402) $ (1,800)   (2,564)
Pension Plan | Forecast            
Defined Benefit Plan Disclosure [Line Items]            
Interest cost on projected benefit obligation         $ 4,375  
Expected return on plan assets         (3,977)  
Net periodic pension (benefit) cost         398  
Supplemental Employee Retirement Plan            
Defined Benefit Plan Disclosure [Line Items]            
Interest cost on projected benefit obligation           318
Net amortization           108
Net periodic pension (benefit) cost $ 118 $ 107 $ 354 $ 320   $ 426
Supplemental Employee Retirement Plan | Forecast            
Defined Benefit Plan Disclosure [Line Items]            
Interest cost on projected benefit obligation         472  
Net amortization         0  
Net periodic pension (benefit) cost         $ 472