Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive (Loss) by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ 3,790,363
Other comprehensive (loss) income before reclassifications	48,229	$ (215,148)
Amounts reclassified from accumulated other comprehensive loss	7,441	40,345
Net current period other comprehensive (loss) income	55,670	(174,803)
Ending balance	4,401,047	3,790,363
Pension and Other Post-Retirement Benefits
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(506,610)	(463,227)
Other comprehensive (loss) income before reclassifications	(18,965)	(71,258)
Amounts reclassified from accumulated other comprehensive loss	7,634	27,875
Net current period other comprehensive (loss) income	(11,331)	(43,383)
Ending balance	(517,941)	(506,610)
Cash Flow Hedges
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(2,572)	(15,042)
Other comprehensive (loss) income before reclassifications	2,765	0
Amounts reclassified from accumulated other comprehensive loss	(193)	12,470
Net current period other comprehensive (loss) income	2,572	12,470
Ending balance	0	(2,572)
Foreign Currency Translation
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(523,360)	(379,470)
Other comprehensive (loss) income before reclassifications	64,429	(143,890)
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current period other comprehensive (loss) income	64,429	(143,890)
Ending balance	(458,931)	(523,360)
Total
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(1,032,542)	(857,739)
Ending balance	$ (976,872)	$ (1,032,542)