ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 2,533,574
Other comprehensive income (loss), net of tax	(20,216)	$ 18,938
Ending Balance	2,631,845		$ 2,533,574
Foreign currency translation adjustments, net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(99,129)	(167,193)	(167,193)
Other comprehensive income (loss) before reclassifications	(20,776)		68,064
Amounts reclassified from accumulated other comprehensive loss	0		0
Other comprehensive income (loss), net of tax	(20,776)		68,064
Ending Balance	(119,905)		(99,129)
Total pension and postretirement adjustments, net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(74,683)	(76,032)	(76,032)
Other comprehensive income (loss) before reclassifications	899		4,141
Amounts reclassified from accumulated other comprehensive loss	(339)		(2,792)
Other comprehensive income (loss), net of tax	560		1,349
Ending Balance	(74,123)		(74,683)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(173,812)	(243,225)	(243,225)
Other comprehensive income (loss) before reclassifications	(19,877)		72,205
Amounts reclassified from accumulated other comprehensive loss	(339)		(2,792)
Other comprehensive income (loss), net of tax	(20,216)	18,938	69,413
Ending Balance	$ (194,028)	$ (224,287)	$ (173,812)