ACCUMULATED OTHER COMPREHENSIVE LOSS - Amounts Included in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss)
Beginning balance	$ 1,718,256	$ 1,562,696
Other comprehensive loss before reclassifications	62,557	(86,757)	$ (8,197)
Amounts reclassified from accumulated other comprehensive loss	31,392	1,275	9,322
Other comprehensive income (loss)	93,949	(85,482)	1,125
Ending balance	1,889,358	1,718,256	1,562,696
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(345,310)	(259,828)	(260,953)
Ending balance	(251,361)	(345,310)	(259,828)
Unrecognized Net Defined Benefit Plan Costs
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(156,733)	(119,474)	(168,604)
Other comprehensive loss before reclassifications	15,556	(39,174)	41,422
Amounts reclassified from accumulated other comprehensive loss	7,654	1,915	7,708
Other comprehensive income (loss)	23,210	(37,259)	49,130
Ending balance	(133,523)	(156,733)	(119,474)
Change in Fair Value of Derivatives
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(772)	(2,327)	(4,656)
Other comprehensive loss before reclassifications	852	2,195	715
Amounts reclassified from accumulated other comprehensive loss	(296)	(640)	1,614
Other comprehensive income (loss)	556	1,555	2,329
Ending balance	(216)	(772)	(2,327)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss)
Beginning balance	(187,805)	(138,027)	(87,693)
Other comprehensive loss before reclassifications	46,149	(49,778)	(50,334)
Amounts reclassified from accumulated other comprehensive loss	24,034	0	0
Other comprehensive income (loss)	70,183	(49,778)	(50,334)
Ending balance	$ (117,622)	$ (187,805)	$ (138,027)