ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Equity, beginning balance			$ 1,268,610
Net other comprehensive income/(loss)	$ 26,364	$ (9,865)	39,723	$ (16,647)
Equity, ending balance	1,265,062		1,265,062
Income tax expense related to items of other comprehensive income/(loss)	100	143	202	286
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			39,000	(17,500)
Amounts reclassified from accumulated other comprehensive income/(loss) (1)			0	0
Net other comprehensive income/(loss)			39,000	(17,500)
Equity, ending balance	(176,000)	(196,800)	(176,000)	(196,800)
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)			600	900
Net other comprehensive income/(loss)			600	900
Equity, ending balance	(38,400)	(40,900)	(38,400)	(40,900)
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			39,000	(17,500)
Amounts reclassified from accumulated other comprehensive income/(loss) (1)			600	900
Net other comprehensive income/(loss)			39,600	(16,600)
Equity, ending balance	$ (214,400)	$ (237,700)	$ (214,400)	$ (237,700)