ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Equity, beginning balance			$ 1,268,610
Net other comprehensive income/(loss)	$ 47,817	$ 9,122	87,540	$ (7,525)
Equity, ending balance	1,321,402		1,321,402
Income tax expense related to items of other comprehensive income/(loss)	14,068	137	14,270	423
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Equity, beginning balance			(215,000)	(179,300)
Other comprehensive income/(loss) before reclassifications			43,600	(8,800)
Amounts reclassified from accumulated other comprehensive income/(loss) (1)			0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax			0
Net other comprehensive income/(loss)			43,600	(8,800)
Equity, ending balance	(171,400)	(188,100)	(171,400)	(188,100)
Pension and Post-Retirement Plan Benefit Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Equity, beginning balance			(39,000)	(41,800)
Other comprehensive income/(loss) before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive income/(loss) (1)			2,200	1,300
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax			41,700
Net other comprehensive income/(loss)			43,900	1,300
Equity, ending balance	4,900	(40,500)	4,900	(40,500)
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Equity, beginning balance			(254,000)	(221,100)
Other comprehensive income/(loss) before reclassifications			43,600	(8,800)
Amounts reclassified from accumulated other comprehensive income/(loss) (1)			2,200	1,300
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax			(41,700)
Net other comprehensive income/(loss)			87,500	(7,500)
Equity, ending balance	$ (166,500)	$ (228,600)	$ (166,500)	$ (228,600)