v3.26.1
PENSION AND POST-RETIREMENT BENEFIT PLANS - Changes in Benefit Obligation and Changes in Plan Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
United States      
Change in benefit obligation      
Service cost $ 1    
U.K.      
Change in plan assets      
Fair value of plan assets, beginning of year 419,963    
Fair value of plan assets, end of year 464,929 $ 419,963  
Pension      
Change in plan assets      
Transfer to QRP   (16,000)  
Pension | United States      
Change in benefit obligation      
Benefit obligation, beginning of year 3,632 56,722  
Service cost 0 202 $ 211
Interest cost 138 1,816 3,140
Net actuarial loss (gain) 66 (7,357)  
Benefits paid (including lump sums) (666) (496)  
Settlements 0 (46,856)  
Curtailment gain 0 (399)  
Foreign currency exchange rate impact 0 0  
Benefit obligation, end of year 3,170 3,632 56,722
Change in plan assets      
Fair value of plan assets, beginning of year 0 62,008  
Actual return on plan assets 0 823  
Employer contributions 666 489  
Benefits paid (including lump sums) (666) (496)  
Settlements 0 (46,856)  
Transfer to QRP 0 (15,968)  
Foreign currency exchange rate impact 0 0  
Fair value of plan assets, end of year 0 0 62,008
(Under) funded status, end of year (3,170) (3,632)  
Pension | U.K.      
Change in benefit obligation      
Benefit obligation, beginning of year 420,626 488,269  
Service cost 0 0 0
Interest cost 21,589 19,288 19,610
Net actuarial loss (gain) 12,559 (62,955)  
Benefits paid (including lump sums) (18,296) (18,822)  
Settlements 0 0  
Curtailment gain 0 0  
Foreign currency exchange rate impact 32,201 (5,154)  
Benefit obligation, end of year 468,679 420,626 488,269
Change in plan assets      
Fair value of plan assets, beginning of year 419,963 488,701  
Actual return on plan assets 30,922 (45,117)  
Employer contributions 186 172  
Benefits paid (including lump sums) (18,296) (18,822)  
Settlements 0 0  
Transfer to QRP 0 0  
Foreign currency exchange rate impact 32,154 (4,971)  
Fair value of plan assets, end of year 464,929 419,963 488,701
(Under) funded status, end of year (3,750) (663)  
Post-Retirement | United States      
Change in benefit obligation      
Benefit obligation, beginning of year 4,042 4,248  
Service cost 0 1 4
Interest cost 212 206 231
Net actuarial loss (gain) (480) (370)  
Benefits paid (including lump sums) (65) (43)  
Settlements 0 0  
Curtailment gain 0 0  
Foreign currency exchange rate impact 0 0  
Benefit obligation, end of year 3,709 4,042 4,248
Change in plan assets      
Fair value of plan assets, beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 65 0  
Benefits paid (including lump sums) (65) 0  
Settlements 0 0  
Transfer to QRP 0 0  
Foreign currency exchange rate impact 0 0  
Fair value of plan assets, end of year 0 0 $ 0
(Under) funded status, end of year $ (3,709) $ (4,042)