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Pension and Other Postretirement Benefits - Plan Assets and Funded Status (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Benefits      
Change in projected benefit obligation ("PBO")      
Service cost $ 4,983 $ 5,321 $ 5,679
Interest cost 11,286 10,714 11,316
Change in plan assets      
Fair value of plan assets at beginning of year 163,136    
Fair value of plan assets at end of year 155,185 163,136  
Postretirement Benefits      
Change in projected benefit obligation ("PBO")      
Projected benefit obligation at beginning of year 11,298 11,428  
Service cost 322 333 429
Interest cost 549 519 662
Actuarial loss (gain) (103) (208)  
Curtailments 0 0  
Settlements 0 0  
Participants’ contributions 741 745  
Benefit payments (1,295) (1,519)  
Deconsolidation of VIE gain 0    
Foreign currency translation 0 0  
Projected benefit obligation at end of year 11,512 11,298 11,428
Accumulated benefit obligation at end of year 11,512 11,298  
Change in plan assets      
Fair value of plan assets at beginning of year 0 0  
Return on plan assets 0 0  
Employer contributions 554 774  
Participants’ contributions 741 745  
Settlements 0 0  
Benefit payments (1,295) (1,519)  
Deconsolidation of VIE gain 0    
Foreign currency translation 0 0  
Fair value of plan assets at end of year 0 0 0
Funded status (fair value of plan assets less PBO) (11,512) (11,298)  
Pension Benefits (Underfunded) | Pension Benefits      
Change in projected benefit obligation ("PBO")      
Projected benefit obligation at beginning of year 211,984 219,642  
Service cost 4,983 5,321  
Interest cost 10,239 9,761  
Actuarial loss (gain) 2,916 (946)  
Curtailments 0 (176)  
Settlements (27,344) (16,046)  
Participants’ contributions 0 0  
Benefit payments (4,472) (4,404)  
Deconsolidation of VIE gain (233)    
Foreign currency translation 848 (1,168)  
Projected benefit obligation at end of year 198,921 211,984 219,642
Accumulated benefit obligation at end of year 184,945 195,080  
Change in plan assets      
Fair value of plan assets at beginning of year 140,288 154,216  
Return on plan assets 11,280 (3,533)  
Employer contributions 11,883 10,183  
Participants’ contributions 0 0  
Settlements (27,344) (16,046)  
Benefit payments (4,472) (4,404)  
Deconsolidation of VIE gain (175)    
Foreign currency translation 31 (128)  
Fair value of plan assets at end of year 131,491 140,288 154,216
Funded status (fair value of plan assets less PBO) (67,430) (71,696)  
Pension Benefits (Overfunded) | Pension Benefits      
Change in projected benefit obligation ("PBO")      
Projected benefit obligation at beginning of year 18,555 20,559  
Service cost 0 0  
Interest cost 1,047 953  
Actuarial loss (gain) (338) (1,678)  
Curtailments (309) 0  
Settlements 0 0  
Participants’ contributions 0 0  
Benefit payments (1,236) (986)  
Deconsolidation of VIE gain 0    
Foreign currency translation 1,403 (293)  
Projected benefit obligation at end of year 19,122 18,555 20,559
Accumulated benefit obligation at end of year 19,122 18,308  
Change in plan assets      
Fair value of plan assets at beginning of year 22,848 26,557  
Return on plan assets 103 (2,367)  
Employer contributions 247 0  
Participants’ contributions 0 0  
Settlements 0 0  
Benefit payments (1,236) (986)  
Deconsolidation of VIE gain 0    
Foreign currency translation 1,732 (356)  
Fair value of plan assets at end of year 23,694 22,848 $ 26,557
Funded status (fair value of plan assets less PBO) $ 4,572 $ 4,293