Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive (Loss) by Component (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
AOCI Attributable to Parent [Roll Forward]
Beginning balance	$ 3,804,447	$ 3,503,290
Other comprehensive income (loss) before reclassifications	17,052	(116,946)
Amounts reclassified from accumulated other comprehensive loss	3,633	21,457
Other comprehensive income (loss), net of income taxes	20,685	(95,489)
Ending balance	4,085,794	3,653,563
Pension and Other Post-Retirement Benefits
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(506,610)	(463,227)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	3,826	13,975
Other comprehensive income (loss), net of income taxes	3,826	13,975
Ending balance	(502,784)	(449,252)
Cash Flow Hedges
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(2,572)	(15,042)
Other comprehensive income (loss) before reclassifications	2,765	0
Amounts reclassified from accumulated other comprehensive loss	(193)	7,482
Other comprehensive income (loss), net of income taxes	2,572	7,482
Ending balance	0	(7,560)
Foreign Currency Translation
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(523,360)	(379,470)
Other comprehensive income (loss) before reclassifications	14,287	(116,946)
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive income (loss), net of income taxes	14,287	(116,946)
Ending balance	(509,073)	(496,416)
Total
AOCI Attributable to Parent [Roll Forward]
Beginning balance	(1,032,542)	(857,739)
Ending balance	$ (1,011,857)	$ (953,228)