RETIREMENT BENEFITS - Schedule of Changes in Benefit Obligations and Plan Assets as Well as Funded Status of Retirement Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Change in plan assets
Fair value of plan assets at beginning of year	$ 769,630
Fair value of plan assets at end of year	780,505	$ 769,630
Pension Benefits
Change in benefit obligation
Obligation at beginning of year	653,971	698,726
Service cost	7,467	8,415	$ 8,573
Interest cost	32,559	33,868	34,725
Actuarial losses (gains)	8,000	(18,748)
Special termination benefits	0	0
Plan amendments	36	0
Curtailment gain	(1,346)	(239)
Benefits paid	(49,494)	(62,056)
Participants’ contributions	0	0
Foreign currency exchange rate changes	12,231	(5,995)
Obligation at end of year	663,424	653,971	698,726
Change in plan assets
Fair value of plan assets at beginning of year	769,630	807,016
Actual return on plan assets	57,200	21,689
Employer contributions	3,169	2,981
Participants’ contributions	0	0
Benefits paid	(49,494)	(62,056)
Fair value of plan assets at end of year	780,505	769,630	807,016
Funded status	117,081	115,659
Amounts recognized in the consolidated balance sheets
Non-current assets	208,100	206,800
Current liabilities	(3,735)	(3,009)
Non-current liabilities	(87,284)	(88,132)
Net amount recognized	117,081	115,659
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss (gain)	155,043	170,649
Prior service cost (credit)	101	234
Net amount recognized	155,144	170,883
Other Postretirement Benefits
Change in benefit obligation
Obligation at beginning of year	11,955	13,373
Service cost	13	27	50
Interest cost	428	644	745
Actuarial losses (gains)	(2,529)	(65)
Special termination benefits	0	0
Plan amendments	(38)	(339)
Curtailment gain	0	0
Benefits paid	(1,247)	(1,703)
Participants’ contributions	1	18
Foreign currency exchange rate changes	0	0
Obligation at end of year	8,583	11,955	13,373
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	1,246	1,685
Participants’ contributions	1	18
Benefits paid	(1,247)	(1,703)
Fair value of plan assets at end of year	0	0	$ 0
Funded status	(8,583)	(11,955)
Amounts recognized in the consolidated balance sheets
Non-current assets	0	0
Current liabilities	(1,643)	(1,299)
Non-current liabilities	(6,940)	(10,656)
Net amount recognized	(8,583)	(11,955)
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss (gain)	(6,192)	(4,443)
Prior service cost (credit)	(318)	(340)
Net amount recognized	$ (6,510)	$ (4,783)